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. 11, 2012
Filed:
Sep. 17, 2010
Hirokuni Yano, Tokyo, JP;
Hiroshi Yao, Kanagawa, JP;
Hajime Yamazaki, Saitama, JP;
Tatsuya Sumiyoshi, Kanagawa, JP;
Yoshimi Niisato, Kanagawa, JP;
Takahiro Totsuka, Chiba, JP;
Hirokuni Yano, Tokyo, JP;
Hiroshi Yao, Kanagawa, JP;
Hajime Yamazaki, Saitama, JP;
Tatsuya Sumiyoshi, Kanagawa, JP;
Yoshimi Niisato, Kanagawa, JP;
Takahiro Totsuka, Chiba, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to one embodiment, a free blocks included in a nonvolatile semiconductor memory are classified into a plurality of free block management lists. When a free block is acquired at normal priority, the free block is acquired from the free block management list in which a number of free blocks is larger than a first threshold. When a free block is acquired at high priority, the free block is acquired from the free block management list irrespective of the first threshold.