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:
Sep. 21, 2004
Filed:
May. 10, 2001
Carl F. Barnhart, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The test generation software takes advantage of the regularity of the structure without introducing significant changes to the test pattern generation software or to the manufacturing test tools. In this manner, the number of test patterns, the pattern data volume, and the length of the scan chains used for testing the imbedded repetitive structures is substantially reduced. The imbedded repetitive structures are tested by structuring and connecting the scan chain segments of the repeated structures in a way that permits identical test stimuli to be loaded into each copy of the repeated structure. A multiple input signature register or other such equivalent data compressing means provide the necessary data compression for reducing the volume of the test results that can be observed during scan by the tester to detect the presence of any fault that was observed.