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:
Mar. 19, 2002
Filed:
Dec. 01, 2000
Applicant:
Inventor:
Masahito Suzuki, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kanagawa, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 7/00 ;
U.S. Cl.
CPC ...
G11C 7/00 ;
Abstract
Failure determination of a memory is made in sequence based on address information supplied to the memory using a test circuit built inside the memory, and resultant failure determination information output from a comparator circuit and the address information output from an address counter circuit are fetched in sequence and held in a logic scan chain, whereby the logic scan chain which is originally provided for a logic test is efficiently used also for a memory test so as to obtain information concerning one or more failure locations and the number of failures by one BIST test without addition of a complicated circuit configuration.