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:
Aug. 05, 2014
Filed:
Jun. 18, 2010
Satoru Hanzawa, Hachioji, JP;
Satoru Hanzawa, Hachioji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A high-speed large-capacity phase-change memory is achieved. A semiconductor device according to the present invention includes: a plurality of memory planes MP; a plurality of storage information register groups SDRBK paired with the plurality of memory planes; and a chip control circuit CPCTL. The plurality of memory planes include a plurality of memory cells. Also, the plurality of storage information register groups temporarily retain information to be stored in the plurality of memory planes. Further, the chip control circuit includes a register which temporarily stores a value indicating volume of the storage information, and a first storage information volume is smaller than a second storage information volume. When the first storage information volume is written, the plurality of memory planes and the plurality of storage information register groups are activated during a first period. When the second storage information volume is written, the plurality of memory planes and the plurality of storage information register groups are activated during a second period. By such a structure, the first period is shorter than the second period.