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SynTest Receives Two Fundamental Patents on Scan Compression

Friday, September 12, 2008

San Jose, CA -- On August 12, 2008, the U.S. Patent and Trademark Office (PTO) issued two patents (U.S. Patent No. 7,412,637 and U.S. Patent No. 7,412,672) to SynTest Technologies, Inc., a leading supplier of Design-for-Test (DFT) tools, for its groundbreaking inventions covering broadcasting scan patterns for reducing test data volume and test application time in Automatic Test Equipment (ATE) in a scan-based integrated circuit.

"To date, 19 patents have been issued to SynTest, but SynTest's proprietary scan compression technologies covered by these two patents are particularly exciting to me because they have been used in our innovative scan compression VirtualScan product offering since June 2002 when we filed these patents and announced the VirtualScan product offering at the 2002 ACM/IEEE Design Automation Conference," said Dr. L.-T. Wang, founder, president & CEO of SynTest. "Our patented compression architecture and method allows our technology to guarantee very high fault coverage while minimizing test data volume and test application time. The novel compression architecture featured in these patents includes a multiplexer network for stimulus decompression, and an optional scan connector to reorder the scan chains to further improve the circuit's fault coverage. Our patented method is based upon the use of a combinational logic network for stimulus decompression and an XOR network for response compaction, so with our invention, there is no need to solve any system of linear equations as a separate step after scan Automatic Test Pattern Generation (ATPG)."

"Significant efforts over many years have been undertaken to support the development and implementation of our combinational-logic-based compression architecture and the unique technology approach of our VirtualScan product offering," added Dr. Ravi Apte, VP of Strategy, Marketing and Business Development of SynTest.

About SynTest

SynTest Technologies, Inc., established in 1990, develops IP for advanced Design-For-Test (DFT) and Design-For-Debug/Diagnosis (DFD) applications (including logic BIST, memory BIST, boundary-scan synthesis, Scan/ATPG with test compression, concurrent fault simulation, and silicon debug and diagnosis) and markets them throughout the world, to semiconductor companies, system houses and design service providers. SynTest products improve an electronic design's quality and reduce overall design and test costs. SynTest is headquartered in Sunnyvale, California, and has field offices in Taiwan, Japan, Korea and China, and distributors in Europe, Asia, and Israel. More information regarding SynTest is available at

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