PROCESS FOR COINTEGRATION OF TWO PHASE CHANGE MEMORY (PCM) ARRAYS HAVING DIFFERENT PHASE CHANGE MATERIALS, AND IN-MEMORY COMPUTATION SYSTEM UTILIZING THE TWO PCM ARRAYS
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United States of America
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Issued Date -
Feb 6, 2025
app pub date -
Aug 1, 2023
filing date -
Aug 1, 2023
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Abstract
An in-memory computation (IMC) system includes an in-memory computation circuit formed by a first phase change memory (PCM) array configured to store the computational weights for an in-memory computation operation. A data storage circuit is formed by a second PCM array configured to store backup data for the computational weights for the in-memory computation operation. The first PCM array includes PCM cells made of a phase change material provided by a first GST alloy, and the second PCM array includes PCM cells made of a phase change material provided by a second GST alloy different from the first GST alloy. A control circuit operates to read the backup data from the second PCM array and write to the first PCM array to refresh the computational weights for the in-memory computation operation from the backup data.
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