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:
Dec. 27, 2011
Filed:
Oct. 13, 2008
Donato Orazio Forlenza, Hopewell Junction, NY (US);
Orazio Pasquale Forlenza, Hopewell Junction, NY (US);
Phong T Tran, Highland, NY (US);
Donato Orazio Forlenza, Hopewell Junction, NY (US);
Orazio Pasquale Forlenza, Hopewell Junction, NY (US);
Phong T Tran, Highland, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method, apparatus and computer program product are provided for implementing diagnostics of transitional scan chain defects using structural Logic Built In Self Test (LBIST) test patterns. A LBIST test pattern is applied to the device under test and multiple system clock sequences with variable loop control are applied in a passing operating region and scan data is unloaded. The LBIST test pattern is applied to the device under test and multiple system clock sequences with variable loop control are applied in a failing operating region for the device under test and scan data is unloaded. Then the unload data from the passing operating region and the failing operating region are compared. The identified latches having different results are identified as potential AC defective latches. The identified potential AC defective latches are sent to a Physical Failure Analysis system.