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In response to demands for a mask ROM with large bit capacity, a 1M-word*16 bit mask ROM with 120-ns access time has been fabricated. A programmable redundancy technique utilizes electrically fusible polysilicon links with the secondary breakdown mechanism of a MOSFET for high production yield and small chip area. The memory cell matrix arranged in 8192 rows*2048 columns and is divided into four blocks...
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