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:
Feb. 17, 2004
Filed:
Jun. 30, 2000
Kevin W. Stanley, St. Albans, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
This invention teaches a computerized method for diagnosing both transient and stuck faults in scan chains. The method first examines repeating patterns in the scan test to determine the type of fault and creates a signature load for each stuck and transient fault based on the pattern for each type of fault. The method then runs a simulation using the signature at a selected assumed fault position. The results of the simulation are then compared with the actual scan result to see if the fault position was determined. If not, the method continues to run simulation on selected assumed fault positions until the simulated result matches the actual scan test results.