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CMOS Floating Gate Defect Detection Using Supply Current Test with DC Power Supply Superposed by AC Component

Hiroyuki MICHINISHI, Tokumi YOKOHIRA, Takuji OKAMOTO, Toshifumi KOBAYASHI, Tsutomu HONDO

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Summary :

This paper proposes a new supply current test method for detecting floating gate defects in CMOS ICs. In the method, unusual increase of the supply current caused by defects is promoted by superposing an AC component on the DC power supply. Feasibility of the test is examined by some experiments on four DUTs with an intentionally caused defect. The results showed that our method could detect clearly all the defects, one of which may be detected by neither any functional logic test nor any conventional supply current test.

Publication
IEICE TRANSACTIONS on Information Vol.E87-D No.3 pp.551-556
Publication Date
2004/03/01
Publicized
Online ISSN
DOI
Type of Manuscript
Special Section PAPER (Special Section on Test and Verification of VLSI)
Category
Fault Detection

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