Some semiconductor packages may suffer from a high-power or performance penalty due to high load line (impedance) from an onboard voltage regulator to loads on a die of the semiconductor package. These penalties may be particularly pronounced in small form factor, Z height constrained, or cost constrained semiconductor packages. For example, some legacy semiconductor packages may have a 15 milli-ohm (mΩ) load line with an estimated 150 (millivolt) mV performance degradation.
In the following detailed description, reference is made to the accompanying drawings which form a part hereof, wherein like numerals designate like parts throughout, and in which is shown by way of illustration embodiments in which the subject matter of the present disclosure may be practiced. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present disclosure. Therefore, the following detailed description is not to be taken in a limiting sense, and the scope of embodiments is defined by the appended claims and their equivalents.
For the purposes of the present disclosure, the phrase “A or B” means (A), (B), or (A and B). For the purposes of the present disclosure, the phrase “A, B, or C” means (A), (B), (C), (A and B), (A and C), (B and C), or (A, B and C).
The description may use perspective-based descriptions such as top/bottom, in/out, over/under, and the like. Such descriptions are merely used to facilitate the discussion and are not intended to restrict the application of embodiments described herein to any particular orientation.
The description may use the phrases “in an embodiment,” or “in embodiments,” which may each refer to one or more of the same or different embodiments. Furthermore, the terms “comprising,” “including,” “having,” and the like, as used with respect to embodiments of the present disclosure, are synonymous.
The term “coupled with,” along with its derivatives, may be used herein. “Coupled” may mean one or more of the following. “Coupled” may mean that two or more elements are in direct physical or electrical contact. However, “coupled” may also mean that two or more elements indirectly contact each other, but yet still cooperate or interact with each other, and may mean that one or more other elements are coupled or connected between the elements that are said to be coupled with each other. The term “directly coupled” may mean that two or elements are in direct contact.
In various embodiments, the phrase “a first feature formed, deposited, or otherwise disposed on a second feature,” may mean that the first feature is formed, deposited, or disposed over the feature layer, and at least a part of the first feature may be in direct contact (e.g., direct physical or electrical contact) or indirect contact (e.g., having one or more other features between the first feature and the second feature) with at least a part of the second feature.
Various operations may be described as multiple discrete operations in turn, in a manner that is most helpful in understanding the claimed subject matter. However, the order of description should not be construed as to imply that these operations are necessarily order dependent.
Embodiments herein may be described with respect to various Figures. Unless explicitly stated, the dimensions of the Figures are intended to be simplified illustrative examples, rather than depictions of relative dimensions. For example, various lengths/widths/heights of elements in the Figures may not be drawn to scale unless indicated otherwise.
Generally, embodiments herein may improve direct current (DC) resistance and alternating current (AC) loop of voltage rail power delivery from a voltage regulator to multiple loads on a die of a package. Specifically, some embodiments may include a low resistance frame of an electrically conductive material such as copper. The frame may be coupled to the edge of the semiconductor package. Embodiments may further include a composite structure to address power delivery in packages that include multiple voltage rails. Embodiments may further include a high-k dielectric material encapsulated in the conductive frame to increase passive capacitance of the frame. Some embodiments may include discrete capacitors coupled with the frame exterior.
Generally, various embodiments may help reduce the above-described parasitic impedance. As a result, embodiments may provide significant performance gains for semiconductor packages, for example by increasing central processing unit (CPU) core or graphics performance. Additionally, embodiments may reduce one or more size factors of the semiconductor package such as Z height or overall lateral area of the package. Some embodiments may further reduce the cost of a semiconductor package. Additionally, some embodiments may enable single-sided platform assembly due to a reduced capacitance requirement.
The electrical interconnects 120 may be, for example, solder bumps, plated elements of a redistribution layer, or some other type of electrical interconnect. More generally, the electrical interconnects 120 may be configured to carry data signals or power between the die 115 and the substrate 130. The electrical interconnects 120 may be, for example, coupled with one or more vias, traces, or some other conductive element within the substrate 130, or along the top surface of the substrate 130. These additional elements are not shown for the sake of clarity of the Figure.
The semiconductor package may further include one or more additional dies such as die 105. Die 105 may be a die such as a memory, processing unit, or some other type of die such as those described above with respect to die 115. The die 105 may be coupled with the substrate 130 by additional electrical interconnects 110. The electrical interconnects 110 may be, for example, a pillar formed of a conductive material such as copper. In other embodiments, the electrical interconnects 110 may be solder bumps, or some other type of electrical interconnect.
The package may be coupled with a substrate 150 by electrical interconnects 155. Similarly to electrical interconnects 120, electrical interconnects 155 may be solder bumps, plated interconnects of a redistribution layer, or some other type of electrical interconnect. The substrate 150 may be, for example, a motherboard, or some other type of substrate. More generally, the substrate 150 may be a cored or coreless substrate with a plurality of conductive elements such as traces or vias positioned therein.
The substrate 150 may include a plurality of rails, which may be similar to power rail 135. Specifically, rail 160 may be a first power rail, which may be referred to as VCC1. Rail 175 may be another power rail, which may be referred to as VCC2. Rail 170 may be, for example, a ground rail which may be referred to as VSS. Rail 165 may be a signal rail which may be designed to carry communicative signals between the semiconductor package and another element coupled with the substrate 150. It will be understood that the depictions of the number of rails and the substrate 150, and the specific description of what each rail is, is intended only as one example embodiment. In other embodiments the substrate 150 may include more or fewer rails, or specific rails may be used for other functions. For example, in some embodiments the substrate may include four rails, but only one of those rails may be a power rail, and three of the rails may be signal rails. Other variations may be present in other embodiments. It will further be understood that in some embodiments one or more of the rails, for example the power rails, may be coupled with a voltage regulator that is coupled with, or is an element of, the substrate 150.
The system 100 may further include a conductive frame 125 around the periphery of the substrate 130. More specifically, the conductive frame 125 may be coupled with the sidewall of the substrate 130, which may be considered to be the portion of the substrate 130 at the periphery of the substrate 130 and positioned between the top surface and the bottom surface of the substrate 130. Generally, the conductive frame 125 may be formed of a conductive material such as copper or some other conductive material. As can be seen in
In embodiments, the power rail 135 of the substrate 130 may be coupled with a rail of the substrate 150 by one or more of the electrical interconnects 155 as shown in
In these embodiments, the conductive frame 125 may additionally be coupled with the power rail 135, as shown in
It will be understood that
The system 100 may realize one or more of the benefits above due at least in part to the conductive frame 125. Specifically, the conductive frame 125 may provide multiple low resistance parallel paths for current flow from the voltage regulator to the dies 115/105. As a result, the multiple low resistance parallel paths for current flow may reduce the overall parasitic impedance experienced by the system 100. This reduced parasitic impedance may be due at least in part to the conductive frame having a low resistance due to a relatively thick amount of conductive material, as will be discussed below. As a result, the dies 105 or 115 may experience significantly increased performance capabilities.
Generally, the substrate 230 may have a Z height dimension Z1 and a lateral dimension X1. In some embodiments, the dimension X1 may be, for example, on the order of approximately 20 millimeters (mm). The dimension Z1 may be, for example, on the order of approximately 200 micrometers (“microns” or “μm”).
The conductive frame 225 may have an overall Z height Z2 of approximately 600 μm. Specifically, the conductive frame 225 may measure approximately 200 μm from the top of the substrate 230, as indicated by Z3. The conductive ring 225 may also measure approximately 200 μm from the bottom of the substrate 230, as indicated by Z4.
Additionally, the conductive frame 225 may have an overall width, as indicated by X3, of approximately 500 μm. In this embodiment, the portion of the conductive frame 225 that is at the periphery of the substrate 230 may measure approximately 200 μm as indicated by X2. In this embodiment, the conductive frame 225 may then overlap the substrate 230 by approximately 300 μm.
It will be understood, however, that the above-described measurements are intended as examples. In other embodiments, the conductive frame 225 or the substrate 230 may have different measurements in one or more dimension. For example, the conductive frame 225 may have a different measurement in the lateral dimension or the Z height dimension than is depicted in
The periphery of the substrate 330 may be indicated by dashed line 303, which is overlapped by conductive frame 325 is discussed above with respect to
The substrate 330 may additionally include one or more vias 345 which may be similar to vias 145. As can be seen in
The conductive frame 425 may include a plurality of fingers 427, which are coupled with the electrical interconnects 455. Specifically, the embodiment of
As can be seen in
As shown in
Generally, it will be understood that the semiconductor package 400 of
As noted above, one or more of the fingers may be electrically decoupled from another one of the fingers. In this embodiment, one finger may be communicatively coupled with one of the rails 160/165/170/175 while another finger is communicatively coupled with another one of the rails 160/165/170/175.
Specifically,
In the embodiment of
As can be seen, respective ones of the layers 535/545/565 may include fingers 527, 537, and 547 which may be similar to fingers 427. Each of the fingers 527/537/547 may be coupled with a respective one of the electrical interconnects 555 as seen in
The various layers 535/545/565 may be electrically coupled with different ones of the rails of the substrate to which the semiconductor package 500 is coupled. For example, if the semiconductor package 500 is coupled with a substrate such as substrate 150, then different ones of the electrical interconnects 555 may be coupled with different ones of rails 160/165/170/175. In this case, dependent on which electrical interconnects 555 the various fingers 527/537/547 are coupled with, the various layers 535/545/565 may be coupled with different ones of the rails 160/165/170/175.
As a concrete example, if the semiconductor package 500 was coupled with a substrate such as substrate 150, then one of the electrical interconnects 555 may be coupled with a rail (e.g., rail 160) that is a first power rail (e.g., VCC1). Finger 527 may be coupled with that electrical interconnect, and therefore layer 565 may be communicatively coupled with VCC1. Similarly, one of the electrical interconnects 555 may be coupled with a rail (e.g., rail 170) that is a ground rail (e.g., VSS). Finger 537 may be coupled with that electrical interconnect, and therefore layer 535 may be communicatively coupled with VSS. Similarly, one of the electrical interconnects 555 may be coupled with a rail (e.g., rail 175) that is a second power rail (e.g., VCC2). Finger 547 may be coupled with that electrical interconnect, and therefore layer 545 may be communicatively coupled with VCC2.
It will, however, be understood that this description of the various layers and couplings is intended as one example and in other embodiments different ones of the layers 535/545/565 may be coupled with different rails of the substrate to which the semiconductor package 500 is coupled. Additionally, as noted above, the package 500 may include more or fewer layers than are depicted in
In some embodiments, it may be desirable for the semiconductor package 500 to include some type of capacitors. The capacitors may be desirable as local decoupling to ensure power integrity performance of voltage rails such as CPU core, graphics, and multiple input/output (IO) domains.
It will be understood that although the embodiment of
The conductive frame 625 may include a plurality of layers 635, 645, and 665, which may be respectively similar to layers 535, 545, and 565. The various layers 635/645/665 may have a dielectric material 605 positioned therebetween, and the dielectric material 605 may also be positioned between layer 665 and the substrate 630. In various embodiments, the dielectric material 605 may be a dielectric material with a relatively high permittivity value such as polymer film or some other material. More generally, the dielectric material 605 may be a material with a permittivity of greater than approximately 100. The dielectric material 605 may have a relative permittivity of greater than approximately 100. In some embodiments, the dielectric material 605 may be the same material positioned in between each of the various layers 635/645/665, while in other embodiments a different material (or the same material with a different relative permittivity) may be positioned between one or more of the layers from another location between one or more of the layers. In some embodiments certain of the dielectric materials 605 may not be present. For example, in some embodiments the dielectric material 605 may not be positioned between the substrate 630 and the layer 665. Generally, the dielectric material 605 may generate a high-frequency capacitance that may be desirable for load self-noise mitigation. In some embodiments, the dielectric material 605 may be used in place of, or in conjunction with, on-frame capacitors such as capacitors 560.
The technique may further include coupling, at 710, a conductive frame to the sidewall of the semiconductor package. The conductive frame may be similar to, for example, conductive frame 125. In embodiments, the conductive frame may additionally be coupled to one or both of the first side and the second side of the semiconductor package. For example, as shown in
It will be understood that although the technique of
As shown, computing device 1500 may include one or more processors or processor cores 1502 and system memory 1504. For the purpose of this application, including the claims, the terms “processor” and “processor cores” may be considered synonymous, unless the context clearly requires otherwise. The processor 1502 may include any type of processors, such as a CPU, a microprocessor, and the like. The processor 1502 may be implemented as an integrated circuit having multi-cores, e.g., a multi-core microprocessor. The computing device 1500 may include mass storage devices 1506 (such as diskette, hard drive, volatile memory (e.g., DRAM, compact disc read-only memory (CD-ROM), digital versatile disk (DVD), and so forth)). In general, system memory 1504 and/or mass storage devices 1506 may be temporal and/or persistent storage of any type, including, but not limited to, volatile and NVM, optical, magnetic, and/or solid state mass storage, and so forth. Volatile memory may include, but is not limited to, static and/or DRAM. NVM may include, but is not limited to, electrically erasable programmable read-only memory, phase change memory, resistive memory, and so forth. In some embodiments, one or both of the system memory 1504 or the mass storage device 1506 may include computational logic 1522, which may be configured to implement or perform, in whole or in part, one or more instructions that may be stored in the system memory 1504 or the mass storage device 1506. In other embodiments, the computational logic 1522 may be configured to perform a memory-related command such as a read or write command on the system memory 1504 or the mass storage device 1506.
The computing device 1500 may further include input/output (I/O) devices 1508 (such as a display (e.g., a touchscreen display), keyboard, cursor control, remote control, gaming controller, image capture device, and so forth) and communication interfaces 1510 (such as network interface cards, modems, infrared receivers, radio receivers (e.g., Bluetooth), and so forth).
The communication interfaces 1510 may include communication chips (not shown) that may be configured to operate the device 1500 in accordance with a Global System for Mobile Communication (GSM), General Packet Radio Service (GPRS), Universal Mobile Telecommunications System (UMTS), High Speed Packet Access (HSPA), Evolved HSPA (E-HSPA), or Long-Term Evolution (LTE) network. The communication chips may also be configured to operate in accordance with Enhanced Data for GSM Evolution (EDGE), GSM EDGE Radio Access Network (GERAN), Universal Terrestrial Radio Access Network (UTRAN), or Evolved UTRAN (E-UTRAN). The communication chips may be configured to operate in accordance with Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Digital Enhanced Cordless Telecommunications (DECT), Evolution-Data Optimized (EV-DO), derivatives thereof, as well as any other wireless protocols that are designated as 3G, 4G, 5G, and beyond. The communication interfaces 1510 may operate in accordance with other wireless protocols in other embodiments.
The computing device 1500 may further include or be coupled with a power supply. The power supply may, for example, be a power supply that is internal to the computing device 1500 such as a battery. In other embodiments the power supply may be external to the computing device 1500. For example, the power supply may be an electrical source such as an electrical outlet, an external battery, or some other type of power supply. The power supply may be, for example AC, direct current (DC) or some other type of power supply. The power supply may in some embodiments include one or more additional components such as an AC to DC convertor, one or more downconverters, one or more upconverters, transistors, resistors, capacitors, etc. that may be used, for example, to tune or alter the current or voltage of the power supply from one level to another level. In some embodiments the power supply may be configured to provide power to the computing device 1500 or one or more discrete components of the computing device 1500 such as the processor(s) 1502, mass storage 1506, I/O devices 1508, etc.
The above-described computing device 1500 elements may be coupled to each other via system bus 1512, which may represent one or more buses. In the case of multiple buses, they may be bridged by one or more bus bridges (not shown). Each of these elements may perform its conventional functions known in the art. The various elements may be implemented by assembler instructions supported by processor(s) 1502 or high-level languages that may be compiled into such instructions.
The permanent copy of the programming instructions may be placed into mass storage devices 1506 in the factory, or in the field, through, for example, a distribution medium (not shown), such as a compact disc (CD), or through communication interface 1510 (from a distribution server (not shown)). That is, one or more distribution media having an implementation of the agent program may be employed to distribute the agent and to program various computing devices.
The number, capability, and/or capacity of the elements 1508, 1510, 1512 may vary, depending on whether computing device 1500 is used as a stationary computing device, such as a set-top box or desktop computer, or a mobile computing device, such as a tablet computing device, laptop computer, game console, or smartphone. Their constitutions are otherwise known, and accordingly will not be further described.
In various implementations, the computing device 1500 may comprise one or more components of a data center, a laptop, a netbook, a notebook, an ultrabook, a smartphone, a tablet, a personal digital assistant (PDA), an ultra mobile PC, a mobile phone, or a digital camera. In further implementations, the computing device 1500 may be any other electronic device that processes data.
In some embodiments, as noted above, computing device 1500 may include one or more of system 100 or packages 200/300/400/500/600. For example, dies 105/115 may be an element such as processor 1502, memory 1504, etc. As noted above, various of packages such as packages 200/300/400/500/600 may include a die such as processor 1502, memory 1504, etc.
Example 1 includes an electronic device comprising: a semiconductor package with a first side and a second side opposite the first side, and a sidewall positioned between the first side and the second side at a perimeter of the semiconductor package; and a conductive frame that includes a first portion, a second portion, and a third portion positioned between the first portion and the second portion, wherein the first portion is coupled with the first side of the semiconductor package, the second portion is coupled with the second side of the semiconductor package, and the third portion is coupled with the sidewall of the semiconductor package.
Example 2 includes the electronic device of example 1, wherein the first portion has a width as measured in a direction parallel to the first side of the package of 500 micrometers.
Example 3 includes the electronic device of example 1, wherein the third portion has a width as measured in a direction parallel to the first side of the package of 200 micrometers.
Example 4 includes the electronic device of example 1, wherein the conductive frame includes copper.
Example 5 includes the electronic device of example 1, wherein at least part of the first surface and the second surface are exposed by the conductive frame.
Example 5.5 includes the electronic device of any of examples 1-5, wherein the conductive frame is electrically conductive.
Example 6 includes the electronic device of any of examples 1-5, wherein the first portion or the second portion are coupled with a power rail of the semiconductor package.
Example 7 includes the electronic device of example 6, wherein the first side of the package is to couple with a die, and wherein the first portion of the conductive frame is coupled with the power rail by a micro-via in the first side of the package.
Example 8 includes the electronic device of example 7, wherein the die is a memory or a processor.
Example 9 includes the electronic device of example 6, wherein the second side of the package is to couple with a substrate by an interconnect, and wherein the second portion of the conductive frame is coupled with the power rail by the interconnect.
Example 10 includes the electronic device of example 9, wherein the interconnect is a solder bump.
Example 11 includes the electronic device of example 6, wherein the power rail is a signal rail or a ground rail.
Example 12 includes the electronic device of any of examples 1-5, wherein the first side of the semiconductor package has a first plurality of interconnects at a first pitch, and the second side of the semiconductor package has a second plurality of interconnects at a second pitch that is different than the first pitch.
Example 13 includes a semiconductor package structure comprising: a semiconductor package with a first side and a second side opposite the first side, wherein the first side includes a plurality of interconnects configured to couple with a substrate; and a conductive frame coupled with the semiconductor package at the periphery of the semiconductor package, wherein the conductive frame includes: a first layer coupled with the conductive frame, wherein the first layer includes a first extension that is electrically and physically/mechanically coupled with a first interconnect of the plurality of interconnects; and a second layer coupled with the first layer such that the first layer is positioned between the semiconductor package and the second layer, wherein the second layer includes a second extension that is electrically and physically/mechanically coupled with a second interconnect of the plurality of interconnects.
Example 14 includes the semiconductor package structure of example 13, wherein the first side and the second side of the semiconductor package are exposed through the conductive frame.
Example 15 includes the semiconductor package structure of example 13, wherein the conductive frame further comprises a third layer coupled with the second layer such that the second layer is positioned between the first layer and the third layer, wherein the third layer includes a third extension that is electrically and physically/mechanically coupled with a third interconnect of the plurality of interconnects.
Example 16 includes the semiconductor package structure of example 15, wherein the third layer is coupled, by the third interconnect, with a power rail of the semiconductor package.
Example 17 includes the semiconductor package structure of example 13, wherein the first layer is coupled, by the first interconnect, with a power rail of the semiconductor package.
Example 18 includes the semiconductor package structure of example 13, wherein the second layer is coupled, by the second interconnect, with a ground rail of the semiconductor package.
Example 19 includes the semiconductor package structure of any of examples 13-16, wherein the conductive frame includes copper.
Example 20 includes the semiconductor package structure of any of examples 13-16, wherein the plurality of interconnects is a ball grid array (BGA).
Example 21 includes a semiconductor package structure comprising: a semiconductor package that includes: a first side with a first set of interconnects configured to couple with a substrate of a computing device; a second side with a second set of interconnects configured to couple with a die; and a sidewall positioned at a periphery of the semiconductor package between the first side and the second side; and a conductive frame coupled with the semiconductor package, wherein the conductive frame includes: a first layer coupled with the first side, the second side, and the sidewall; and a second layer coupled with the first layer.
Example 22 includes the semiconductor package structure of example 21, wherein the first layer is electrically coupled with a first power rail of the package, and the second layer is electrically coupled with a second power rail of the package.
Example 23 includes the semiconductor package structure of example 22, wherein the first layer is a power layer and the second layer is a ground layer.
Example 24 includes the semiconductor package structure of any of examples 21-23, wherein the conductive frame further comprises a third layer coupled with the second layer.
Example 25 includes the semiconductor package structure of any of examples 21-23, wherein the conductive frame further comprises a dielectric material with a dielectric constant with a relative permittivity greater than 100 positioned between the first layer and the second layer.
Example 26 includes the semiconductor package structure of any of examples 21-23, further comprising a capacitor coupled with the first layer and the second layer.
Example 27 includes the semiconductor package structure of any of examples 21-23, wherein the conductive frame includes copper.
Example 28 includes a method of forming a semiconductor package structure that includes a semiconductor package and a conductive frame at the periphery of the semiconductor package, the method comprising: identifying the semiconductor package, wherein the semiconductor package has a first side, a second side, and a sidewall at the periphery of the semiconductor package and positioned between the first side and the second side; and coupling the conductive frame to the sidewall of the semiconductor package, the first side of the semiconductor package, and the second side of the semiconductor package.
Example 29 includes the method of example 28, wherein the conductive frame includes a first layer coupled with the semiconductor package and a second layer coupled with the first layer such that the first layer is positioned between the semiconductor package and the second layer.
Example 30 includes the method of example 28, wherein the conductive frame further comprises a third layer coupled with the second layer such that the second layer is between the first layer and the third layer.
Example 31 includes the method of any of examples 28-30, further comprising coupling the conductive frame with a power rail of the semiconductor package.
Example 32 includes the method of example 31, wherein the power rail is a signal rail or a ground rail.
Example 33 includes the method of example 31, wherein coupling the conductive frame with the power rail includes coupling the conductive frame, at the first side of the package, with a micro-via that is communicatively coupled with the power rail.
Example 34 includes the method of example 31, wherein coupling the conductive frame with the power rail includes coupling the conductive frame, at the second side of the package, with an interconnect that is communicatively coupled with the power rail.
Various embodiments may include any suitable combination of the above-described embodiments including alternative (or) embodiments of embodiments that are described in conjunctive form (and) above (e.g., the “and” may be “and/or”). Furthermore, some embodiments may include one or more articles of manufacture (e.g., non-transitory computer-readable media) having instructions, stored thereon, that when executed result in actions of any of the above-described embodiments. Moreover, some embodiments may include apparatuses or systems having any suitable means for carrying out the various operations of the above-described embodiments.
The above description of illustrated embodiments, including what is described in the Abstract, is not intended to be exhaustive or limiting as to the precise forms disclosed. While specific implementations of, and examples for, various embodiments or concepts are described herein for illustrative purposes, various equivalent modifications may be possible, as those skilled in the relevant art will recognize. These modifications may be made in light of the above detailed description, the Abstract, the Figures, or the claims.