SRAM(Static Random Access Memory)is often called"personal cache"of computing chips.Unlike DRAM,which needs continuous refresh,sram chip can keep data as long as it is powered on,and the read-write delay is extremely low,which is the key to affect the operation speed and response stability of CPU,GPU and MCU.
First,the two forms of sram chip
From the product form,sram chips are mainly divided into two categories.Independent SRAM appears in the form of discrete chips,emphasizing high safety,reliability and long-term stability.It is often used in automotive electronics,military and aerospace,industrial control and other fields with high requirements for fault tolerance,and has been dominated by overseas manufacturers for a long time.Embedded SRAM(eSRAM)is integrated in MCU,FPGA,CPU/GPU.As a cache unit at all levels,it covers the whole scene of AI,consumer electronics,automotive electronics,etc.It is the fastest growing category in recent years.
Second,the main application fields of domestic high-speed memory chip sram chip
①AI computing power is the engine with the strongest demand for sram chips at this stage.Large-scale model training and reasoning rely on high-speed throughput of massive data,and SRAM is the only carrier of L1/L2/L3 cache in CPU,GPU and NPU.In the new generation of AI chips,SRAM has occupied more than 60%of the silicon area,and the improvement of computing power is inseparable from the synchronous upgrade of storage density.
(2)In the field of automotive electronics,the car gauge MCU,the automatic driving domain controller and the in-vehicle entertainment system all need sram chips to support real-time operation.The demand for SRAM for autonomous driving above L3 level is about five times that of traditional fuel vehicles,and the certification period of vehicle regulations is long and the entry threshold is high.Once domestic manufacturers cut into the supply chain,it is extremely sticky.
(3)Military industry and aerospace put forward strict requirements for the anti-radiation,wide temperature range and extreme environment adaptability of sram chips.Satellites,rockets,fighter planes and other equipment are extremely dependent on high-reliability storage,and the strategic significance of domestic substitution is particularly obvious.
④In industrial control,PLC,servo motor and industrial robot need SRAM to ensure low-delay and high-reliability real-time control,which is an indispensable basic component for high-end equipment manufacturing.
Keywords:sram chip
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Supply and demand of mature process capacity are tightening
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