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:
May. 02, 2006
Filed:
Apr. 02, 2004
Masato Susuki, Kawasaki, JP;
Hiroshi Nakadai, Kawasaki, JP;
Masato Susuki, Kawasaki, JP;
Hiroshi Nakadai, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
For the purpose of providing an inexpensive memory from which test results can be certainly read out, a semiconductor device having a BIST circuit (built-in self test circuit) includes a RAM for use in processing to be tested incorporated in a data processing system, a built-in self test circuit making a built-in self test on the RAM for use in processing, and a RAM for tester storing test results of the RAM for use in processing obtained by the built-in self test circuit so that the test results can be read out by an external tester, wherein a RAM having a data read-out margin greater than a data read-out margin of the RAM for use in processing is used as the RAM for tester.