This U.S. nonprovisional application claims priority under 35 U.S.C § 119 to Korean Patent Application No. 10-2022-0130895 filed on Oct. 12, 2022 in the Korean Intellectual Property Office, the subject matter of which is hereby incorporated by reference in its entirety.
The inventive concept relates generally to semiconductor packages and methods of fabricating same.
Semiconductor chips have gradually become more compact with the continuous development of various semiconductor technologies. However, more functions have been integrated into contemporary and emerging semiconductor chips. Accordingly, semiconductor chips must provide a large number of input/output (I/O) pads on a relatively small area.
A variety of semiconductor packages provide practical accessibility to, and functional utilization of corresponding semiconductor chip(s). In a typical semiconductor package, one or more semiconductor chip(s) is mounted (e.g., electrically connected and/or mechanically assembled) on a substrate (e.g., printed circuit board) using bonding wires and/or conductive bumps. Various studies have been conducted to improve the structural stability and electrical utility of semiconductor packages.
Unfortunately, as the size of contemporary and emerging semiconductor chips continues to decrease, it is difficult to adhere, handle, and test constituent solder balls. Additionally, problems have arisen in the acquisition of diversified mount board(s) in accordance with the size of corresponding semiconductor chip(s).
Embodiments of the inventive concept provide compact semiconductor packages exhibiting improved thermal radiation properties, increased integration and improved electrical properties.
According to some embodiments of the present inventive concepts, a semiconductor package may comprise: a first semiconductor substrate that has a device region and an edge region; a first semiconductor element on the device region, wherein the first semiconductor element is formed on an active surface of the first semiconductor substrate; a first circuit layer disposed on the active surface of the first semiconductor substrate; a first redistribution layer disposed on the first circuit layer; and a plurality of first through vias on the edge region, wherein the first through vias vertically penetrate the first semiconductor substrate and the first circuit layer and are connected to the first redistribution layer. The first circuit layer may include: a first device interlayer dielectric layer that covers the active surface of the first semiconductor substrate; and a first circuit wiring pattern on the device region, wherein the first circuit wiring pattern is provided in the first device interlayer dielectric layer and connected to the first semiconductor element. The first circuit wiring pattern and the first through vias may be electrically connected through the first redistribution layer. The first through vias may be arranged in at least two columns that extend along a lateral surface of the first semiconductor substrate and that are spaced apart from each other in a direction from the device region toward the lateral surface of the first semiconductor substrate.
According to some embodiments of the present inventive concepts, a semiconductor package may comprise: a first semiconductor chip that includes a first silicon substrate, a first semiconductor element formed on an active surface of the first silicon substrate, and a first circuit layer disposed on the active surface of the first silicon substrate; a first redistribution layer disposed on an active surface of the first semiconductor chip and coupled to the first circuit layer; a second redistribution layer disposed on an inactive surface of the first semiconductor chip; a first through via that vertically penetrates the first semiconductor chip and connects the first redistribution layer and the second redistribution layer to each other; and a plurality of pads disposed on the first redistribution layer. The first circuit layer may include: a first device interlayer dielectric layer that covers the active surface of the first silicon substrate; and a first circuit wiring pattern provided in the first device interlayer dielectric layer. The first through via may be spaced apart from the first circuit wiring pattern.
According to some embodiments of the present inventive concepts, a semiconductor package may comprise: a package substrate; and a chip package mounted on the package substrate. The chip package may include: a semiconductor chip that includes a silicon substrate and a circuit wiring pattern on the silicon substrate, the silicon substrate having a semiconductor element formed on an active surface of the silicon substrate, and the circuit wiring pattern being connected to the semiconductor element; a first redistribution layer disposed on a first surface of the semiconductor chip, the first surface being directed toward the package substrate; a second redistribution layer disposed on a second surface of the semiconductor chip, the second surface being opposite to the first surface; and a plurality of through vias that vertically penetrate the semiconductor chip and connect the first redistribution layer and the second redistribution layer to each other. The through vias may be positioned between the circuit wiring pattern and an outer lateral surface of the silicon substrate. A distance from the outer lateral surface of the silicon substrate to a conductive pattern of the first redistribution layer may be less than a distance from the outer lateral surface of the silicon substrate to the circuit wiring pattern.
Advantages, benefits and features, as well as the making and use of the inventive concept may be clearly understood upon consideration of the following detailed description together with the accompanying drawings, in which:
Throughout the written description and drawings, like reference numbers and labels are used to denote like or similar elements, components, features, and/or method steps. Throughout the written description certain geometric terms may be used to highlight relative relationships between elements, components and/or features with respect to certain embodiments of the inventive concept. Those skilled in the art will recognize that such geometric terms are relative in nature, arbitrary in descriptive relationship(s) and/or directed to aspect(s) of the illustrated embodiments. Geometric terms may include, for example: height/width; vertical/horizontal; top/bottom; higher/lower; closer/farther; thicker/thinner; proximate/distant; above/below; under/over; upper/lower; center/side; surrounding; overlay/underlay; etc.
Certain embodiments of the inventive concept or related aspects thereof, may be described in relation to an assumed geometric orientation described by a first direction D1 (e.g., a first horizontal direction), a second direction D2 (e.g., a second horizontal direction) intersecting the first direction D1, and a third direction D3 (e.g., a vertical direction) substantially orthogonal to the first and second directions D1 and D2.
Figure (
Referring to
In some embodiments, the semiconductor substrate 110 may have a width ‘w’ (e.g., a dimension measured in the first horizontal direction D1) that ranges from between about 3 mm to about 50 mm (See, e.g.,
The semiconductor substrate 110 may be conceptually and/or functionally divided into a device region DR and an edge region ER. Referring to
The device region DR may be a region in which one or more semiconductor elements (e.g., the semiconductor chip 100) may be disposed on the semiconductor substrate 110. In contrast, the edge region ER may be understood as a region in which semiconductor element(s) is/are not disposed. In various embodiments, a ratio between a first area occupied by (or designated for) the device region DR and a second area occupied by (or designated for) the edge region ER may range from between about 5:95 to about 95:5.
Referring to
As illustrated in
With respect to the circuit element 122, one or more transistors TR may each include a source and a drain on a lower portion of the semiconductor substrate 110, a gate electrode on the first surface 110a of the semiconductor substrate 110, and a gate dielectric layer interposed between the semiconductor substrate 110 and the gate electrode.
In some embodiments, the circuit element 122 may include multiple transistors TR and/or one or more logic circuit(s). As disposed in the device region DR on the first surface 110a, the circuit element 122 may include a shallow device isolation pattern, logic cell(s) and/or memory cell(s). The circuit element 122 will not usually be disposed on the edge region ER of the semiconductor substrate 110.
The first surface 110a of the semiconductor substrate 110 may be substantially covered by a device interlayer dielectric layer 126. On the device region DR, the device interlayer dielectric layer 126 may substantially encompass the circuit element 122 and an associated circuit writing pattern 124. In some embodiments, the device interlayer dielectric layer 126 may fully encompass the circuit element 122 and may substantially encompass the circuit wiring element 124, save for selectively exposed portions (e.g., selected lower surfaces of the circuit wiring element 124 exposed through a lower surface of the device interlayer dielectric layer 126).
In some embodiments, the device interlayer dielectric layer 126 may extend under the semiconductor substrate 110, and may include at least one of silicon oxide (SiO), silicon nitride (SiN), and silicon oxynitride (SiON). Alternately or additionally, the device interlayer dielectric layer 126 may include a low-k dielectric material.
The device interlayer dielectric layer 126 may have a mono-layered structure or a multi-layered structure. For example, the device interlayer dielectric layer 126 may be a multi-layered structure substantially encompassing multiple wiring layers, wherein an etch stop layer may be interposed between adjacent dielectric layers associated with the device interlayer dielectric layer 126. For example, the etch stop layer may be provided on a lower surface of each dielectric layer, and may include at least one of silicon nitride (SiN), silicon oxynitride (SiON), and silicon carbonitride (SiCN).
As noted above, the device interlayer dielectric layer 126 may substantially encompass the circuit wiring pattern 124. The circuit wiring pattern 124 does not extend into the edge region ER. Accordingly, the circuit layer 120 may only include the device interlayer dielectric layer 126 in the device region DR, such that circuit layer 120 may include the device interlayer dielectric layer 126, the circuit element 122 and the circuit wiring pattern 124. As illustrated in
One or more portions (e.g., portion 124a in
As illustrated in
Connection contacts provided by the circuit wiring pattern 124 may be used to connect the circuit element 122 and/or the semiconductor substrate 110. For example, various connection contacts may vertically penetrate the device interlayer dielectric layer 126 to connect one or more source electrodes, drain electrodes, and gate electrodes of the transistors TR or to various components associated with the circuit element 122. Such connection contacts may include, for example, tungsten (W).
Accordingly, the circuit layer 120 may include the circuit element 122 (as variously constituted), the device interlayer dielectric layer 126, and the circuit wiring pattern 124.
The semiconductor chip 100 may further include one or more through vias 130 provided on the edge region ER. The through vias 130 may be respective conductive patterns forming vertical connection paths. The through vias 130 may vertically penetrate the semiconductor substrate 110 and the device interlayer dielectric layer 126. The through vias 130 may be exposed on the lower surface of the device interlayer dielectric layer 126 and/or an upper surface of the semiconductor substrate 110. The through vias 130 may be provided on the edge region ER of the semiconductor substrate 110, but not on the device region DR. Each one of the through vias 130 may have an elliptical cross-sectional shape and having a diameter ranging from between about 0.001 mm to about 1 mm (See, e.g.,
Since the through vias 130 are disposed on the edge region ER, they are horizontally spaced apart (e.g., in the first horizontal direction D1 or the second horizontal direction D2) from the device region DR. Hence, the through vias 130 are horizontally spaced apart from the circuit wiring pattern 124, such that the through vias 130 are not directly connected to the circuit wiring pattern 124. Further, with this configuration, the through vias 130 are closer to an outer edge of the semiconductor substrate 110 than the circuit wiring pattern 124. Accordingly, a distance from the outer edge of the semiconductor substrate 110 to the through vias 130 is less than a distance from the outer edge of the semiconductor substrate 110 to the circuit wiring pattern 124.
In some embodiments, the through vias 130 may be disposed in an arrangement including at least two columns extending along at least one side of the edge region ER. For example, as shown in
Referring to
In some embodiments, the additional elements 140 may be electrically connected portions of a first redistribution layer 200 disposed on an upper surface of the semiconductor chip 100 with portions of a second redistribution layer 300 disposed on the lower surface of the semiconductor chip 100.
The first redistribution layer 200 may be disposed on the first surface 110a of the semiconductor substrate 110. For example, the first redistribution layer 200 may cover the circuit layer 120. The first redistribution layer 200 may cover both of the device region DR and the edge region ER. The first redistribution layer 200 may include one or more first wiring layers, wherein the first wiring layers are vertically stacked one upon the other. Each of the first wiring layers may include a first redistribution dielectric layer 210 and a first redistribution conductive pattern 220 in the first redistribution dielectric layer 210. When multiple first wiring layer are provided, the first redistribution conductive pattern 220 of one first wiring layer may be electrically connected to the first redistribution conductive pattern 220 of another first wiring layer adjacent to the one first wiring layer.
The first redistribution dielectric layer 210 may include, for example, a dielectric polymer or a photo-imageable dielectric (PID), wherein the photo-imageable dielectric may include at least one of photosensitive polyimide (PI), polybenzoxazole (PBO), phenolic polymers, and benzocyclobutene polymers. Alternately, the first redistribution dielectric layer 210 may include a dielectric material, such as silicon oxide (SiO), silicon nitride (SiN), silicon oxynitride (SiON), silicon carbonitride (SiCN), and/or dielectric polymers.
The first redistribution conductive pattern 220 may be provided on the first redistribution dielectric layer 210. The first redistribution conductive pattern 220 may horizontally extend on the first redistribution dielectric layer 210. The first redistribution conductive pattern 220 may be a component for redistribution in the first wiring layer. The first redistribution conductive pattern 220 may be disposed on both of the device region DR and the edge region ER. At least a portion of the first redistribution conductive pattern 220 may be closer than the circuit wiring pattern 124 to the outer edge of the semiconductor substrate 110. For example, a distance from the outer edge of the semiconductor substrate 110 to the first redistribution conductive pattern 220 may be less than a distance from the outer edge of the semiconductor substrate 110 to the circuit wiring pattern 124. The first redistribution conductive pattern 220 may allow electrical connection of the circuit wiring pattern 124 to expand from the device region DR to the edge region ER. The first redistribution conductive pattern 220 may include a conductive material, such as for example, copper (Cu) and aluminum (Al).
The first redistribution conductive pattern 220 may have a damascene structure. For example, the first redistribution conductive pattern 220 may have a head portion and a tail portion that are integrally connected into a unitary element. The head and tail portions of the first redistribution conductive pattern 220 may have an inverse T-shape cross-section.
The head portion of the first redistribution conductive pattern 220 may be a pad or line part that allows a wiring line in the first redistribution layer 200 to horizontally expand. The head portion may be provided on a lower surface of the first redistribution dielectric layer 210. For example, the head portion may protrude from the lower surface of the first redistribution dielectric layer 210. The first redistribution conductive pattern 220 of a lowermost one of the first wiring layers may be exposed on the lower surface of the first redistribution dielectric layer 210. The first redistribution conductive pattern 220 of the lowermost first wiring layer may have a lower surface coplanar with that of the first redistribution dielectric layer 210.
The tail portion of the first redistribution conductive pattern 220 may be a via part for vertical connection of a wiring line in the first redistribution layer 200. The tail portion may be coupled to another first wiring layer that overlies the tail portion. For example, the tail portion of one first redistribution conductive pattern 220 may extend from an upper surface of the head portion of the one first redistribution conductive pattern 220, and may penetrate the first redistribution dielectric layer 210 to be coupled to the head portion of another first redistribution conductive pattern 220 included in another first wiring layer that overlies the tail portion of the one first redistribution conductive pattern 220. The tail portion of the first redistribution conductive pattern 220 included in an uppermost one of the first wiring layers may penetrate the first redistribution dielectric layer 210 to be coupled to the semiconductor chip 100. For example, the first redistribution conductive pattern 220 of the uppermost first wiring layer may be coupled to the exposed wiring portion 124a on the device region DR, and may be coupled to the through vias 130 on the edge region ER. The through vias 130, the circuit element 122 of the semiconductor chip 100, and the circuit wiring pattern 124 may be electrically connected to each other through the first redistribution layer 200.
The second redistribution layer 300 may be disposed on the second surface 110b of the semiconductor substrate 110. For example, the second redistribution layer 300 may cover the second surface 110b of the semiconductor substrate 110. The second redistribution layer 300 may cover both of the device region DR and the edge region ER. The second redistribution layer 300 may include one or more second, vertically-stacked, wiring layers. Each of the second wiring layers may include a second redistribution dielectric layer 310 and a second redistribution conductive pattern 320 in the second redistribution dielectric layer 310. When multiple second wiring layer are provided, the second redistribution conductive pattern 320 of one second wiring layer may be electrically connected to the second redistribution conductive pattern 320 of another second wiring layer adjacent to the one second wiring layer.
The second redistribution dielectric layer 310 may include a dielectric polymer or a photo-imageable dielectric (PID). For example, the photo-imageable dielectric may include at least one of for example, photosensitive polyimide (PI), polybenzoxazole (PBO), phenolic polymers, and benzocyclobutene polymers. Alternately, the second redistribution dielectric layer 310 may include a dielectric material, such as for example, silicon oxide (SiO), silicon nitride (SiN), silicon oxynitride (SiON), silicon carbonitride (SiCN), and/or dielectric polymers.
The second redistribution conductive pattern 320 may be provided on the second redistribution dielectric layer 310. The second redistribution conductive pattern 320 may horizontally extend on the second redistribution dielectric layer 310. The second redistribution conductive pattern 320 may be a component for redistribution in the second wiring layer. The second redistribution conductive pattern 320 may include a conductive material, such as copper (Cu) and aluminum (Al). The second redistribution conductive pattern 320 may have a damascene structure. For example, the second redistribution conductive pattern 320 may have a head portion and a tail portion that are integrally connected into a single unitary piece. The head and tail portions of the second redistribution conductive pattern 320 may have a T-shape cross-section.
The head portion of the second redistribution conductive pattern 320 may be a pad or line part that allows a wiring line in the second redistribution layer 300 to horizontally expand. The head portion may be provided on an upper surface of the second redistribution dielectric layer 310. For example, the head portion may protrude from the upper surface of the second redistribution dielectric layer 310. The second redistribution conductive pattern 320 of an uppermost one of the second wiring layers may be exposed through the upper surface of the second redistribution dielectric layer 310. The second redistribution conductive pattern 320 of the uppermost second wiring layer may be coplanar with the upper surface of the second redistribution dielectric layer 310. A semiconductor package, a semiconductor chip, or an electronic element may be separately mounted on the second redistribution conductive pattern 320 of the uppermost second wiring layer.
The tail portion of the second redistribution conductive pattern 320 may be a via part for vertical connection of a wiring line in the second redistribution layer 300. The tail portion may be coupled to another second wiring layer that underlies the tail portion. For example, the tail portion of one second redistribution conductive pattern 320 may extend from a lower surface of the one second redistribution conductive pattern 320, and may penetrate the second redistribution dielectric layer 310 to be coupled to the head portion of the second redistribution conductive pattern of another second wiring layer that underlies the tail portion of the one second redistribution conductive pattern 320. The tail portion of the second redistribution conductive pattern 320 included in a lowermost one of the second wiring layers may penetrate the second redistribution dielectric layer 310 to be coupled to the through vias 130. For example, the second redistribution conductive pattern 320 of the lowermost second wiring layer may be coupled to the through vias 130 on the edge region ER. The second redistribution layer 300 may be electrically connected through the through vias 130 and the first redistribution layer 200 to the circuit wiring pattern 124 and the circuit element 122 of the semiconductor chip 100. A distance from a lower surface of the first redistribution layer 200 to an upper surface of the second redistribution layer 300 may range from between about 0.03 mm to about 1 mm.
In some embodiments, the first and second redistribution layers 200 and 300 may be respectively provided on lower and upper surfaces of the semiconductor chip 100. In this configuration, the first and second redistribution layers 200 and 300 may be interconnected not by using connection members provided to one side of the semiconductor chip 100 in the device region DR, but rather by using the through vias 130 that directly penetrate the edge region ER of the semiconductor chip 100. This allows the semiconductor chip 100 to occupy a relatively smaller area.
In addition, since the first and second redistribution layers 200 and 300 are connected using through vias 130, no molding member is required to cover (e.g., isolate and/or protect) separately provided connection members. Accordingly, thermal energy (hereafter, “heat”) generated by the semiconductor chip 100 may be more readily exhausted from the semiconductor package 10. That is, the process of exhausting the heat generated by the semiconductor chip 100 will not thermally-impeded by the insulating properties of the molding member, but instead, heat may be effectively exhausted from side, upper, and lower surfaces of the semiconductor chip 100. This ability improves the overall thermal radiation properties of the semiconductor package 10.
As noted above, the through vias 130 are not provided in the device region DR which includes the circuit element 122 and the circuit wiring pattern 124 associated with the semiconductor chip 100. Accordingly, an increased freedom of layout related to the circuit element 122, as well as both a freedom of layout and freedom of interconnection related to the circuit wiring pattern 124 may be realized. Such expanded freedom in the layout and interconnection of the circuit element 122 and the circuit wiring pattern 124 may enable further integration of the semiconductor package 10. And as a result, it is possible to provide a more compact semiconductor package with increased integration and improved overall electrical properties.
Referring to
One or more external pads 420 may be disposed on a lower surface of the substrate protection layer 410. The external pads 420 may be disposed on at least one of the device region DR and the edge region ER. Thus, while the circuit element 122 and the circuit wiring pattern 124 of the semiconductor substrate 110 may be provided only in the device region DR, in some embodiments, the external pads 420 may be provided in both of the device region DR and the edge region ER. Outermost ones of the external pads 420 may be disposed closer to the outer edge of the semiconductor substrate 110 than the circuit wiring pattern 124. In some embodiments, the external pads 420 may penetrate the substrate protection layer 410 in order to firmly connect to the first redistribution conductive pattern 220 of the first redistribution layer 200. The external pads 420 may serve as pads to which external terminals 430 are coupled. For example, the external pads 420 may correspond to under-bump metals to which the external terminals 430 are bonded.
The external terminals 430 may be respectively and correspondingly provided on lower surfaces of the external terminals 430. The external terminals 430 may be implemented as solder balls and/or solder bumps. And based on a given type for the external terminals 430, the semiconductor package 11 may conform with conventionally understood practices associated with a ball grid array (BGA), a fine ball-grid array (FBGA), or a land grid array (LGA).
Of note, the semiconductor package 12 of
Referring to
Here, in some embodiments, the first package P1 may be substantially similar to the semiconductor package 11 of
Here, the upper pads 322 may each have a width ranging from between about 0.5 μm to about 20 μm, and separated by an interval ranging from between about 0.5 μm to about 20 μm.
Alternately, the first package P1 may be substantially similar to the semiconductor package 10 of
Alternately, the first package P1 may be substantially similar to the semiconductor package 12 of
In the context of the semiconductor package 13 of
The second package P2 may be variously mounted on the first package P1, such that the upper pads 322 of the second redistribution layer 300 of the first package P1 are vertically aligned with the lower pads 222 of the first redistribution layer 200 of the second package P2. Once proper alignment is achieved, the first package P1 and the second package P2 may be disposed in contact, ready for bonding.
Hence, on an interface between the first package P1 and the second package P2, the second redistribution dielectric layer 310 of the second redistribution layer 300 in the first package P1 may be bonded to the first redistribution dielectric layer 210 of the first redistribution layer 200 in the second package P2. In this case, the bonding of the second redistribution dielectric layer 310 and the first redistribution dielectric layer 210 may constitute a hybrid bonding of oxide, nitride, and/or oxynitride. In this regard, the term “hybrid bonding” denotes a bonding approach in which two or more components of like kind (e.g., oxide, nitride, metal, etc.) at least partially merge at an interface therebetween. For example, the second redistribution dielectric layer 310 and the first redistribution dielectric layer 210 bonded together, thereby forming a continuous invisible boundary between the second redistribution dielectric layer 310 and the first redistribution dielectric layer 210. Thus, assuming that the second redistribution dielectric layer 310 and the first redistribution dielectric layer 210 are formed of the same material, no discernable interface will be present between the second redistribution dielectric layer 310 and the first redistribution dielectric layer 210.
However, those skilled in the art will appreciate that hybrid bonding is just one of several approaches that may be used to effectively mount (e.g., electrically connect and/or mechanically assemble) the second package P2 on the first package P1.
In some embodiments, one or more conductive interface(s) between the first package P1 and the second package P2 (e.g., upper pads 322 of the second redistribution layer 300 in the first package P1 and lower pads 222 of the first redistribution layer 200 in the second package P2) may be used to effect mount the second package P2 on the first package P1. For example, assuming the foregoing configuration, the upper pads 322 and the lower pads 222 may undergo an intermetallic hybrid bonding. Accordingly, the upper pads 322 and the lower pads 222—having the same material—may be bonded together without discernable material boundary.
Referring to
The second package P2 may also be substantially similar to the semiconductor package 11 of
Accordingly, the second package P2 may be mounted on the first package P1. For example, the second package P2 may be disposed on the first package P1, such that the upper pads 322 of the second redistribution layer 300 of the first package P1 are vertically aligned with the external pads 420 of the second package P2. Here, the first package P1 and the second package P2 may be vertically spaced apart from each other.
Once properly aligned, the first package P1 and the second package P2 may be connected to each other using (e.g.,) a hybrid bonding approach. For example, the external terminals 430 of the second package P2 may be interposed between the upper pads 322 of the first package P1 and the external pads 420 of the second package P2. The external terminals 430 may connect the upper pads 322 of the first package P1 to the external pads 420 of the second package P2.
An under-fill member (not shown) may be provided between the first package P1 and the second package P2, wherein the under-fill member may substantially surround the external terminals 430 while in-filling the space between the first package P1 and the second package P2.
Referring to
The first (or lower) package P1 in the semiconductor package 15 may be substantially similar to the semiconductor package 11 of
The semiconductor package 15 may further include conductive posts 540 disposed horizontally adjacent to at least one side of the first package P1 on the package substrate 510. Hence, the conductive posts 540 may be horizontally spaced apart from a side surface of the first package P1. Each of the conductive posts 540 may have a pillar shape that extends in a direction substantially perpendicular to the upper surface of the package substrate 510. The conductive posts 540 may be variously connected to the signal pattern of the package substrate 510. In some embodiments, the respective upper surfaces of the conductive posts 540 may be disposed at the same level as an upper surface of the first package P1. (In this context the term “level” denotes a distance, usually measured in the third (or vertical) direction, relative to an arbitrarily selected reference (e.g., a horizontal surface or point, such as the upper surface of the package substrate 510). The conductive posts 540 may include at least one metallic material, such as copper (Cu) and tungsten (W). Although not shown, each of the conductive posts 540 may include a seed layer variously disposed on bottom and/or side surfaces.
The second package P2 may be disposed on the first package P1 and the upper surfaces of the conductive posts 540. The second package P2 may be substantially the same as the semiconductor package 10 of
Thus, a first portion of the second package P2 may overlap the first package P1, while a second portion of the second package P2 may horizontally extend (or protrude) beyond a side surface of the first package P1.
A lower surface of the second package P2 may be substantially parallel with the upper surface of the package substrate 510, as the second package P2 may be mounted at least partially on the upper surface of the first package P1 and also on the upper surfaces of the conductive posts 540.
At least some of the upper pads 322 of the second redistribution layer 300 of the first package P1 may be vertically aligned with the lower pads 222 of the first redistribution layer 200 of the second package P2. In this manner, the first package P1 and the conductive posts 540 may contact with the second package P2.
Once properly disposed and placed in contact, the first package P1 and the second package P2 may be bonded together using (e.g.,) a hybrid bonding approach. Accordingly, at respective interface(s) between the first package P1 and the second package P2, the upper pads 322 of the second redistribution layer 300 of the first package P1 may be bonded to the lower pads 222 of the first redistribution layer 200 of the second package P2. In this regard, the upper pads 322 of the first package P1 may be at least partially merged with the lower pads 222 of the second package P2 using (e.g.,) an intermetallic hybrid bonding approach.
The conductive posts 540 may also be connected to the second package P2. For example, upper surfaces of the conductive posts 540 may respectively be placed in contact with lower pads 222 of the first redistribution layer 200 included in the second package P2 and then bonded using (e.g.,) an intermetallic hybrid bonding approach. Alternately, the conductive posts 540 may be respectively connected through connection terminals (e.g., solder balls) to the lower pads 222 of the second package P2.
Hence, the second package P2 may be electrically connected to the package substrate 510 through the conductive posts 540 or through the first redistribution layer 200, the through vias 130, and the second redistribution layer 300 of the first package P1. And since the second package P2 is connected to the package substrate 510 through not only the conductive posts 540, but also the first package P1, the total number of the conductive posts 540 required to mount of the second package P2 may be reduced, thereby enabling a decrease in the overall size of the semiconductor package 15.
Additionally, a molding layer 530 (e.g., a dielectric polymer, such as an epoxy molding compound (EMC)) may be provided on the package substrate 510 to cover exposed portions of the package substrate 510 and substantially encompass the conductive posts 540, the first package P1, and the second package P2. Thus, in some embodiments, the molding layer 530 may cover side and upper surfaces of each of the first package P1 and the second package P2. Alternately, the molding layer 530 may expose the upper surface of the second package P2. On one side of the first package P1, the molding layer 530 may fill a space between the package substrate 510 and the second package P2. The molding layer 530 may substantially encompass the conductive posts 540 between the package substrate 510 and the second package P2.
In some embodiments multiple second packages P2 may horizontally disposed and vertically stacked on the first package P1. For example,
In this regard, a first one of the second packages P2 may be stacked on the first package P1 and horizontally offset in one direction, and a second one of the second packages P2 may be stacked on the first package P1 and horizontally offset in another direction. Thus, the first one of the second packages P2 may extend beyond one side surface of the first package P1 and the second one of the second packages P2 may extend beyond another side surface of the first package P1 opposing the one side surface.
The semiconductor package 16 may include the package substrate 510, as well as conductive posts 540. Here, however, The conductive posts 540 may be horizontally disposed on either side (or both sides) of the first package P1. For example, a first group of conductive posts 540 may be disposed to one side of the first package P1, and may be used to electrically connect the package substrate 510 and the first one of the second packages P2. Additionally, a second group of conductive posts 540 may be disposed to another side of the first package P1 opposing the one side, and may be used to electrically connect the package substrate 510 and the second one of the second packages P2.
Here again, the molding layer 530 may be provided on the package substrate 510 to substantially surround the conductive posts 540, the first package P1, and the second packages P2. Thus, the molding layer 530 may fill space(s) between the package substrate 510 and the second packages P2, and surround the conductive posts 540 between the package substrate 510 and the second packages P2.
Referring to
Referring to
The device interlayer dielectric layer 126 and the circuit wiring pattern 124 may also be formed on the semiconductor substrate 110. For example, at least one dielectric material may be deposited on the front surface 110a of the semiconductor substrate 110, thereby forming a lower portion of the device interlayer dielectric layer 126. Connection contacts may be formed to penetrate the lower portion of the device interlayer dielectric layer 126 to connect the semiconductor substrate 110, and the circuit wiring pattern 124 may be formed in the lower portion of the device interlayer dielectric layer 126. The circuit wiring pattern 124 may be formed in the device region DR, but not on the edge region ER. At least one dielectric material may be deposited on the lower portion of the device interlayer dielectric layer 126 to form an upper portion of the device interlayer dielectric layer 126. Connection contacts may be formed to penetrate the device interlayer dielectric layer 126 to variously connect with the circuit wiring pattern 124. Thus, the circuit layer 120 may include the circuit element 122, the circuit wiring pattern 124, and the device interlayer dielectric layer 126.
Referring to
Referring to
Referring to
A thinning process (e.g., a chemical mechanical polishing (CMP) process) may now be performed on the semiconductor substrate 110. The thinning process may be performed on the rear surface 110b of the semiconductor substrate 110 to remove a portion at the rear surface 110b of the semiconductor substrate 110. After the thinning process, upper surfaces of the through vias 130 may be exposed. However, in some embodiments, the thinning process may also remove upper portions of the through vias 130.
Referring to
In some embodiments, the formation of the second redistribution layer 300 may be omitted. (See e.g., the embodiment illustrated in
Thereafter, the carrier substrate 910 may be removed from the first redistribution layer 200 to expose the lower surface of the first redistribution layer 200. In this regard, the adhesive member may be physically or chemically removed from the carrier substrate 910.
Referring to
The substrate protection layer 410 may be patterned to expose the lower pads of the first redistribution layer 200 or the first redistribution conductive pattern 220 of the lowermost first wiring layer included in the first redistribution layer 200. A conductive layer may be formed on the substrate protection layer 410, and the conductive layer may be patterned to form external pads 420. The external pads 420 may be coupled to the lower pads of the first redistribution layer 200.
The external terminals 430 may be provided on the first redistribution layer 200. The external terminals 430 may be provided on lower surfaces of the external pads 420.
Certain semiconductor packages according to embodiments of the inventive concept include first and second redistribution layers respectively provided on upper and lower surfaces of a semiconductor chip. The first and second redistribution layers may be electrically connected using through vias that penetrate the body of the semiconductor chip in an edge region substantially surrounding a device region. Given this configuration, the resulting semiconductor packages may have a more compact size occupying a smaller area.
Since the first and second redistribution layers may be connected in the foregoing manner, no molding member is required for connection members conventionally used to connect upper and lower conductive elements. As a result, heat generated by operation of the semiconductor chip may be readily exhausted—given the absence of inherent insulating effects associated with the conventionally-provided molding member. And as a further result, semiconductor packages according to embodiments of the inventive concept exhibit improved thermal radiation properties.
Since the through vias are disposed in only designated edge region(s) of semiconductor packages according to embodiments of the inventive concept, such semiconductor packages enjoy relatively freedom of layout and/or freedom of interconnection. Accordingly, various circuit element(s) and associated circuit wiring pattern(s) may be designed to increase overall integration and/or prevent design failures (e.g., short-circuit electrical connections). As a result, more compact sized semiconductor packages exhibiting increased integration and improved electrical properties may be provided.
Although the inventive concept has been described in relation to certain embodiments thereof, those skilled in the art will appreciate that variations in form and detail may be made without departing from the scope of the inventive concept, as defined by the accompanying claims.
Number | Date | Country | Kind |
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10-2022-0130895 | Oct 2022 | KR | national |