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:
Jul. 05, 1994
Filed:
Sep. 09, 1992
Applicant:
Inventors:
Katsunori Seno, , US;
Kurt Knorpp, , US;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365210 ;
Abstract
In a single chip semiconductor memory, having independent memory areas for normal memory cells and redundant memory cells, the redundant cells are tested in a parallel or multi-bit test mode simultaneously with the normal cells they replace, by enabling the redundant memory area in response to simultaneous detection of the state of the multi-bit test mode, the presence of a programmed redundant bit for a memory cell under test, and the operative selection of the normal memory matrix.