A capture-safety checking metric based on transition-time-relation for at-speed scan testing

Kohei Miyase, Ryota Sakai, Xiaoqing Wen, Masao Aso, Hiroshi Furukawa, Yuta Yamato, Seiji Kajihara

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Test power has become a critical issue, especially for lowpower devices with deeply optimized functional power profiles. Particularly, excessive capture power in at-speed scan testing may cause timing failures that result in test-induced yield loss. This has made capturesafety checking mandatory for test vectors. However, previous capturesafety checking metrics suffer from inadequate accuracy since they ignore the time relations among different transitions caused by a test vector in a circuit. This paper presents a novel metric called the Transition-Time-Relation-based (TTR) metric which takes transition time relations into consideration in capture-safety checking. Detailed analysis done on an industrial circuit has demonstrated the advantages of the TTR metric. Capturesafety checking with the TTR metric greatly improves the accuracy of test vector sign-off and low-capture-power test generation.

Original languageEnglish
Pages (from-to)2003-2011
Number of pages9
JournalIEICE Transactions on Information and Systems
Issue number9
Publication statusPublished - Sept 2013

All Science Journal Classification (ASJC) codes

  • Software
  • Hardware and Architecture
  • Computer Vision and Pattern Recognition
  • Electrical and Electronic Engineering
  • Artificial Intelligence


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