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:
Jan. 04, 2011
Filed:
Jun. 30, 2008
Tomoji Takada, Kawasaki, JP;
Tomoji Takada, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A semiconductor memory has a plurality of blocks, and each of the blocks comprises a plurality of pages, and further, each of the pages has a plurality of memory cells. A block having defective bits less than N (N is an integer number more than 0) in all pages of the block stores a first data showing a normal block. A block including at least one page having defective bits more than N and including no page having defective bits more than M (M is an integer number of M>N) stores a second data showing a psedo-pass block as a pseudo-normal block. A block including at least one page having defective bits more than M stores a third data showing a defective block.