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:
Oct. 14, 2008
Filed:
Apr. 30, 2007
Toshitake Yaegashi, Yokohama, JP;
Kenji Sawamura, Yokohama, JP;
Toshitake Yaegashi, Yokohama, JP;
Kenji Sawamura, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A nonvolatile semiconductor memory according to examples of the present invention includes a NAND string comprised memory cells connected in series, two select gate transistors each of which is connected to each end of the NAND string, and a write control circuit which makes a first write condition for a selected cell different from a second write condition for the selected cell. The first write condition is that the selected cell is one of two memory cells adjacent to the two select gate transistors. The second write condition is that the selected cell is one of the memory cells except for two memory cells adjacent to the two select gate transistors.