The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 12, 2000
Filed:
Feb. 23, 1998
Shinji Hiratsuka, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
The aim is to improve reliability and life of a semiconductor storage device using memory elements for which deterioration is a problem. In a semiconductor disk device equipped with a flash memory section 110 having memory elements M(0).about.M(9) having a plurality of sectors used as ordinary sectors or spare sectors, and a disk controller section 120 that performs data writing/reading in respect of memory elements M(0).about.M(9) in accordance with address information input from outside, there are provided a data error information management table 127 that stores for each memory element the situation regarding occurrence of write/read error of memory elements M(0).about.M(9), a micro CPU 131 that detects deterioration of memory elements in accordance with the situation regarding occurrence of write/read error stored in data error information management table 127, and an address conversion table 128 that effects conversion of address information such that memory elements M(0).about.M(9) for which deterioration has been detected by micro CPU 131 are not used.