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:
Apr. 18, 2006
Filed:
Aug. 27, 2003
Norihiko Satani, Miyazaki, JP;
Shinichiro Sato, Miyazaki, JP;
Norihiko Satani, Miyazaki, JP;
Shinichiro Sato, Miyazaki, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A semiconductor memory device includes a redundant memory cell, an electrode and an output circuit. The redundant memory cell is used instead of a memory cell when the memory cell has a defect. The electrode applys with a test signal for setting a test condition from outside in testing the redundant memory cell. The output circuit outputs data read out of the memory cell and the redundant memory cell. When the test signal is applied to the electrode to set the test condition for the redundant memory cell, the output circuit is configured to output data read out of the redundant memory cell at a level different from a signal level of data readout of the memory cell for output.