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. 03, 2005
Filed:
Feb. 12, 2003
Kiichi Makuta, Kodaira, JP;
Akihiro Fujita, Kokubunji, JP;
Hideo Kasai, Musashino, JP;
Masashii Wada, Kodaira, JP;
Atsushi Toukairin, Kodaira, JP;
Kiichi Makuta, Kodaira, JP;
Akihiro Fujita, Kokubunji, JP;
Hideo Kasai, Musashino, JP;
Masashii Wada, Kodaira, JP;
Atsushi Toukairin, Kodaira, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
A nonvolatile semiconductor memory device includes a memory array which comprises a plurality of memory cells of a type wherein predetermined voltages are applied to selected memory cells to change their threshold voltages, whereby information are stored therein according to the difference between the threshold voltages, and whose some memory cells are used as spare memory cells. The nonvolatile semiconductor memory device is provided with a latch circuit connected to each bit line of the memory array through a transmission switch. The memory array is capable of storing therein at least substitutional information for replacing a defective bit by the spare memory cell. The substitutional information is transferred from the memory array to the latch circuit through the transmission switch and held in the latch circuit.