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:
Jun. 22, 2010
Filed:
Jul. 05, 2007
Applicant:
Nobuo Yamamoto, Tokyo, JP;
Inventor:
Nobuo Yamamoto, Tokyo, JP;
Assignee:
Elpida Memory, Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11C 29/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor memory device includes a memory cell array, a plurality of data input/output terminals, a plurality of signal paths for writing data supplied to the data input/output terminals to the memory cell array in parallel, a plurality of latch circuits temporarily holding the data on the signal paths, respectively, and a selector selectively supplying the data to the latch circuits from a test data terminal during a test operation. The data can be thereby supplied from the test data terminal to the latch circuits in parallel during the test operation. The number of terminals used at an operation test can be, therefore, greatly decreased.