This application claims priority to Chinese Patent Application No. 202111539943.8 filed on Dec. 15, 2021, the disclosure of which is hereby incorporated by reference in its entirety.
A semiconductor memory is composed of many repeated memory cells, and each memory cell typically includes a capacitor and a transistor. In the transistor, a gate is connected to a word line (WL), a drain is connected to a bit line (BL), and a source is connected to the capacitor. A voltage signal on the WL can control the transistor to turn on or off, and then data information stored in the capacitor is read through the BL, or data information is written into the capacitor through the BL for storage.
Semiconductor memories can be classified into non-volatile memories and volatile memories. As a volatile memory, a dynamic random access memory (DRAM) has a high storage density, a fast read-write speed, and other advantages. The DRAM is widely used in various electronic systems. DRAMs can be classified into double data rate (DDR) DRAMs, graphics double data rate (GDDR) DRAMs, and low power double data rate (LPDDR) DRAMs.
Embodiments of the present disclosure relate to the technical field of semiconductors, and in particular, to a memory.
According to some embodiments of the present disclosure, an embodiment of the present disclosure provides a memory, including: bit lines (BLs) extending along a first direction and word lines (WLs) extending along a second direction; a column selection circuit and a plurality of memory modules that are arranged along the first direction, wherein each of the plurality of memory modules includes a memory array and an amplifier array that are arranged along the first direction, the memory array includes at least one memory cell, the amplifier array includes at least one amplification unit, each of the BLs is electrically connected to one terminal of a corresponding amplification unit, and each of the WLs is electrically connected to a corresponding memory cell; column-select lines (CSLs) extending along the first direction, wherein the CSLs each are electrically connected to the column selection circuit, and the column selection circuit drives a corresponding amplification unit through one of the CSLs; a read-write control driver circuit, wherein the read-write control driver circuit and the column selection circuit are located, respectively, on two adjacent sides of the plurality of memory modules as a whole; and a global data line extending along the first direction and an electrical connection line (CL) extending along a third direction, wherein the global data line is electrically connected to the read-write control driver circuit through the electrical CL, and the read-write control driver circuit is configured to drive a memory module corresponding to the global data line to write data into the memory cell through the global data line, or to read data from the memory cell and transmit the data to the global data line.
One or more embodiments are exemplified by corresponding drawings, and these exemplified descriptions do not constitute a limitation on the embodiments. Components with the same reference numerals in the drawings are denoted as similar components, and the drawings are not limited by scale unless otherwise specified.
In the above memory, the read-write control driver circuit 14 is located on one side of each of the plurality of memory banks 10, and the row decoding circuit 15 is located another side of each of the plurality of memory banks 10, which restricts a size and a shape of a chip to a certain extent and affects packaging of the chip or optimization of manufacturing efficiency. In addition, in the above memory, RC delays of driving different memory modules by the read-write control driver circuit 14 are quite different. Specifically, a memory module closest to the read-write control driver circuit 14 is defined as a first memory module, and a memory module furthest away from the read-write control driver circuit 14 is defined as a second memory module. A connection node between a global data line Gdata and the first memory module is far away from a connection node between the global data line Gdata and the second memory module. As a result, there is a large difference between time delays when the read-write control driver circuit drives the first memory module and the second memory module, and the read-write control driver circuit 14 needs to take a long time to drive the second memory module, causing an adverse impact on a read-write speed of the memory.
The embodiments of the present disclosure provide a memory in which a read-write control driver circuit and a column selection circuit are arranged, respectively, on two adjacent sides of a plurality of memory modules as a whole, to solve an RC delay problem, make a chip design more flexible, and improve storage performance of the memory.
In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the embodiments of the present disclosure are described below with reference to the drawings. Those skilled in the art should understand that many technical details are proposed in the embodiments of the present disclosure to make the present disclosure better understood. However, even without these technical details and various changes and modifications made based on the following embodiments, the technical solutions claimed in the present disclosure may still be realized.
Referring to
It should be noted that only one BL and one WL are shown in
In the above embodiment, the column selection circuit 103 and the read-write control driver circuit 101 are located, respectively, on the two adjacent sides of the plurality of memory modules 102 as a whole, such that a shape and a size of the memory can be adjusted more flexibly and manufacturing efficiency can be optimized. Moreover, an arrangement direction of the read-write control driver circuit 101 and an arrangement direction of the plurality of memory modules 102 are different from an extension direction of the global data line Gdata. In this way, signal transmission paths required by the read-write control driver circuit 101 to drive different memory modules 102 are only slightly different, so as to solve an RC delay problem and improve a read-write speed. In addition, in the above memory, different memory modules 102 can be driven by the read-write control driver circuit 101 through the electrical CL. This is conducive to reducing structural complexity of the read-write control driver circuit 101, a size of the read-write control driver circuit 101, and chip area of the memory.
In some embodiments, the memory may be a DRAM, for example, a double data rate (DRR) 4 DRAM or a DDR5 DRAM. In other embodiments, the memory may alternatively be a static random access memory (SRAM), a NAND memory, a NOR memory, a FeRAM, or a PcRAM.
Referring to
In some embodiments, the memory cell 21 may be a DRAM memory cell.
Referring to
The BLs are electrically connected to memory cells 21 arranged along the first direction Y in a plurality of memory arrays 112, and a same BL is electrically connected to all the memory cells 21 arranged along the first direction Y. It can be understood that the BL can be presented as a bus, and the same BL is a same BL bus.
The WLs are electrically connected to memory cells 21 arranged along the second direction X1 in the plurality of memory arrays 112, and a same WL is electrically connected to a row of memory cells 21 arranged along the second direction X1 in a same memory array 112. It can be understood that the WL can be presented as a bus, and the same WL is a same WL bus.
The column selection circuit 103, commonly referred to as a YDEC circuit, is configured to provide the column selection signal for the amplification unit 22 to select the amplification unit 22 to transmit the data between the BL and the local data line Ldata. The CSL is electrically connected to the column selection circuit 103 through the electrical CL, and is configured to provide the column selection signal for a control terminal of a corresponding amplification unit 22 to select the amplification unit 22, such that the amplification unit 22 realizes data transmission and amplification.
The electrical CL is configured to electrically connect the read-write control driver circuit 101 and the global data line Gdata, such that the read-write control driver circuit 101 is electrically connected to a corresponding memory module 102. In some embodiments, the third direction X2 may be the same as the second direction X1, in other words, an extension direction of the electrical CL may be the same as that of the WL, and the first direction Y may be perpendicular to the third direction X2. In this way, a length of the electrical CL can be as short as possible, such that a path required by the read-write control driver circuit 101 to drive the memory module 102 can be as short as possible, which is conducive to further improving read-write performance of the memory.
Each memory module 102 arranged along the first direction Y may be defined as a section. In some embodiments, the read-write control driver circuit 101 may be arranged in the middle of one side of the plurality of memory modules 102 as a whole, which is conducive to further reducing a difference between signal transmission time required by the read-write control driver circuit 101 to drive head-end and tail-end sections, so as to further improve overall performance of the memory. The CSL is configured to turn on a plurality of BLs in a same section and a corresponding local data line Ldata. Each section includes a plurality of CSLs, and may further include a conventional CSL and a redundant CSL. When the memory operates, one CSL in each section is selected and turned on.
As previously analyzed, in some embodiments, the memory may further include local data lines Ldata. Each of the local data lines Ldata extends along the second direction X1, and a same local data line Ldata is electrically connected to second terminals of amplification units 22 in a same amplifier array 122. It can be understood that one amplifier array 122 may be connected to a plurality of local data lines Ldata.
In some embodiments, the memory may further include a complementary BL. Accordingly, the memory may further include a local complementary data line.
In some embodiments, referring to
Referring to
Referring to
In some embodiments, referring to
In some embodiments, the row decoding circuit 104 and the read-write control driver circuit 101 may be located at a same layer of the memory. In other embodiments, the row decoding circuit 104 and the read-write control driver circuit 101 may be located at different layers of the memory.
In the first direction Y, the plurality of memory modules 102 are sorted by natural number in ascending order, a memory module 102 in an odd position is defined as a first memory module, and a memory module 102 in an even position is defined as a second memory module; the global data line Gdata includes: a first global data line G1 corresponding to the first memory module, and a second global data line G2 corresponding to the second memory module; and the electrical CL includes: a first electrical CL (CL1) electrically connected to the first global data line G1 and the read-write control driver circuit 101, and a second electrical CL (CL2) electrically connected to the second global data line G2 and the read-write control driver circuit 101. The first global data line G1 and the second global data line G2 are independent of each other, and the first electrical CL (CL1) and the second electrical CL (CL2) are independent of each other. Both the first electrical CL (CL1) and the second electrical CL (CL2) extend along the third direction X2.
Specifically, in some embodiments, referring to
In other embodiments, referring to
In some embodiments, referring to
In some embodiments, global data lines Gdata electrically connected to different read-write control driving units 111 are distributed at intervals. For example, some global data lines Gdata are distributed at edges of the plurality of memory modules 102, and other global data lines Gdata are distributed in middle regions of the plurality of memory modules 102. Different global data lines Gdata are distributed at intervals, which can avoid signal interference between different global data lines Gdata and is conducive to further improving storage performance of the memory.
It can be understood that in some embodiments, there may be a plurality of global data lines Gdata, and all the global data lines Gdata may be distributed at the edges of the plurality of memory modules 102.
In some embodiments, with reference to
Specifically, each of the at least two module regions I contains a same quantity of memory modules 102. In addition, the memory may further be divided into a high-bit address memory bank U and a low-bit address memory bank V. The high-bit address memory bank U and the low-bit address memory bank V each include a plurality of memory modules 102.
Memory cells 21 in different module regions I are connected to different WLs, in other words, a WL in a module region I is enabled while WLs in other module regions I are not enabled. In this case, because different module regions I have mutually independent global data lines Gdata, the read-write control driving module 110 may select only a global data line Gdata corresponding to a module region I corresponding to the enabled WL to drive a memory module 102 in the module region I, while other module regions I do not need to be driven by the read-write control driving module 110, which can reduce more power consumption. Moreover, a scheme in which each of the at least two module regions I has a mutually independent global data line Gdata can reduce a length of each global data line Gdata, which is conducive to reducing resistance of the global data line Gdata. Moreover, load on each global data line Gdata is reduced, which is conducive to reducing a heat loss and power consumption. It can be understood that the load includes the memory module 102 electrically connected to the global data line Gdata.
As shown in
In some embodiments, the read-write control driver circuit 101 is configured to: when a WL corresponding to the module region I is enabled, the read-write control driving module 110 corresponding to the module region I drives the memory module 102 in the module region I through the global data line Gdata. As can be seen above, this is conducive to reducing the power consumption of the memory.
Referring to
Specifically, in some embodiments, referring to
In other embodiments, referring to
Referring to
It should be noted that in some embodiments, global data lines Gdata of different module regions I can be independent of each other. In some embodiments, as shown in
An embodiment of the present disclosure provides a memory with a superior structure and superior performance. A column selection circuit 103 and a read-write control driver circuit 101 are arranged on different sides of a plurality of memory modules 102 as a whole, which makes a chip design of the memory more flexible, helps to reduce chip area, and reduces time required for transmitting a column selection signal to an amplification unit 22 far away from the read-write control driver circuit 101. This is conducive to solving a RC delay problem and improving read-write performance of the memory.
The technical solutions provided in the embodiments of the present disclosure have the following advantages:
The embodiments of the present disclosure provide a memory with a superior structure and superior performance. A column selection circuit and a plurality of memory modules are arranged along a first direction. A read-write control driver circuit and the column selection circuit are located, respectively, on two adjacent sides of the plurality of memory modules as a whole. A global data line extends along a second direction, and an electrical CL extends along a third direction. The global data line is electrically connected to the read-write control driver circuit through the electrical CL, and the read-write control driver circuit is configured to drive a memory module corresponding to the global data line. The read-write control driver circuit and the column selection circuit are located, respectively, on the two adjacent sides of the plurality of memory modules as a whole, which makes a chip layout corresponding to the memory more flexible. In addition, the global data line and the electrical CL forms a T-shape structure. In this way, a difference between signal transmission paths required by the read-write control driver circuit to drive head-end and tail-end memory modules is small, which solves an RC delay problem of the read-write control driver circuit and is conducive to improving a read-write speed of the memory.
Those skilled in the art can understand that the above implementations are specific embodiments for implementing the present disclosure. In practical applications, various changes may be made to the above embodiments in terms of form and details without departing from the spirit and scope of the present disclosure. Any person skilled in the art may make changes and modifications to the embodiments without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the scope defined by the claims.
Number | Date | Country | Kind |
---|---|---|---|
202111539943.8 | Dec 2021 | CN | national |