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:
Apr. 01, 2014
Filed:
May. 17, 2010
Yu Huang, Sudbury, MA (US);
Wu-tung Cheng, Lake Oswego, OR (US);
Ruifeng Guo, Portland, OR (US);
Ting-pu Tai, Taipei, TW;
Yu Huang, Sudbury, MA (US);
Wu-Tung Cheng, Lake Oswego, OR (US);
Ruifeng Guo, Portland, OR (US);
Ting-Pu Tai, Taipei, TW;
Mentor Graphics Corporation, Wilsonville, OR (US);
Abstract
Scan chain diagnosis techniques are disclosed. Faulty scan chains are modeled and scan patterns are masked to filter out loading-caused failures. By simulating the masked scan patterns, failing probabilities are determined for cells on a faulty scan chain. One or more defective cells are identified based upon the failing probability information. A noise filtering system such as the one based upon adaptive feedback may be adopted for the identification process.