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Efficient neighborhood pattern-sensitive fault test algorithms for semiconductor memories

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3 Author(s)
Kuo-Liang Cheng ; Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan ; Ming-Fu Tsai ; Cheng-Wen Wu

We present two memory test algorithms for neighborhood pattern sensitive faults (NPSFs), including static NPSF (SNPSF), passive NPSF (PNPSF) and active NPSF (ANPSF). March algorithms are widely used in memory testing because of their linear time complexity and ease in built-in self-test (BIST) implementation. Although conventional March algorithms do not generate all neighborhood patterns for testing the NPSFs, they can be modified by using multiple data backgrounds such that all neighborhood patterns can be generated. The proposed multi-background March algorithms have shorter test length than previously proposed ones (68N for detecting SNPSFs and PNPSFs and 96N for detecting all NPSFs). Also, based on the proposed algorithms, linear-time BIST circuit can be implemented with low area overhead

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VLSI Test Symposium, 19th IEEE Proceedings on. VTS 2001

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