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:
Dec. 03, 2013
Filed:
Apr. 30, 2009
Takashi Miida, Tokyo, JP;
Riichiro Shirota, Kanagawa, JP;
Hideki Arakawa, Kanagawa, JP;
Ching Sung Yang, Hsinchu, TW;
Tzung Ling Lin, Banciao, TW;
Takashi Miida, Tokyo, JP;
Riichiro Shirota, Kanagawa, JP;
Hideki Arakawa, Kanagawa, JP;
Ching Sung Yang, Hsinchu, TW;
Tzung Ling Lin, Banciao, TW;
Powerchip Corporation, Tokyo, JP;
Powerchip Technology Corporation, Hsinchu, TW;
Abstract
In a programming method for a NAND flash memory device, a self-boosting scheme is used to eliminate excess electrons in the channel of an inhibit cell string that would otherwise cause programming disturb. The elimination is enabled by applying a negative voltage to word lines connected to the inhibit cell string before boosting the channel, and this leads to bringing high program immunity. A row decoder circuitry to achieve the programming operation and a file system architecture based on the programming scheme to improve the efficiency of file management are also described.