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:
May. 22, 2018
Filed:
Mar. 30, 2012
Ken Takeuchi, Tokyo, JP;
Kousuke Miyaji, Tokyo, JP;
Koh Johguchi, Tokyo, JP;
Hiroki Fujii, Tokyo, JP;
Ken Takeuchi, Tokyo, JP;
Kousuke Miyaji, Tokyo, JP;
Koh Johguchi, Tokyo, JP;
Hiroki Fujii, Tokyo, JP;
THE UNIVERSITY OF TOKYO, Tokyo, JP;
Abstract
When a data utilization ratio R which is a utilization ratio of sectors in one page is not lower than a threshold value Rthand when write data is not frequently-rewritten data, a flash memory is controlled such that the write data is stored into the flash memory. When the data utilization ratio R which is the utilization ratio of sectors in one page is lower than the threshold value Rthor when the write data is frequently-rewritten data although the data utilization ratio R is not lower than the threshold value Rth, a ReRAM is controlled such that the write data is stored into the ReRAM. This suppresses deterioration of the flash memory.