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. 20, 2004
Filed:
May. 08, 2002
Applicant:
Inventors:
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 7/00 ;
U.S. Cl.
CPC ...
G11C 7/00 ;
Abstract
In each of a plurality of memory chips in the semiconductor integrated circuit device, an address signal of a defective memory cell in a memory circuit is obtained by a pattern generation tester circuit and a repair analysis circuit, and stored in a replacement storage circuit. The address signal read out of the replacement storage circuit is set to a replacement-repair circuit, and the defective memory cell is replaced with a spare memory cell. The replacement of a defective memory cell with a spare memory cell is allowed even after packaging, so that the yield is increased. The test time is also reduced, as the plurality of memory chips are tested in parallel.