Static information storage and retrieval – Read/write circuit – Bad bit
Patent
1992-11-25
1997-07-01
Nguyen, Viet Q.
Static information storage and retrieval
Read/write circuit
Bad bit
395430, 371 211, 371 212, 36518533, G11C 1300
Patent
active
056445393
ABSTRACT:
A semiconductor disk wherein a flash memory into which data is rewritten in block unit is employed as a storage medium, said semiconductor disk comprises a data memory in which file data are stored, a substitutive memory which substitutes for blocks of errors in the data memory, an error memory in which error information of the data memory are stored, and a memory controller which reads data out of, writes data into and erases data from the data memory, the substitutive memory and the error memory. Since the write errors of the flash memory can be remedied, the service life of the semiconductor disk can be increased.
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Furuno Takeshi
Hayashi Yoshihiro
Kaki Kenichi
Katayama Kunihiro
Terada Kouichi
Hitachi , Ltd.
Nguyen Viet Q.
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