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oai:kanazawa-u.repo.nii.ac.jp:00009509 2024-06-20T06:26:57Z 934:935:936

Improvement on Defect Detection Performance of PCB Inspection Based on ECT Technique With Multi-SV-GMR Sensor Chomsuwan, K. 80019786 Yamada, Sotoshi Iwahara, Masayoshi © 2007 IEEE. This paper describes the improvement on the defect detection performance of printed circuit board (PCB) inspection based on the eddy-current testing (ECT) technique with the multispin-valve giant magnetoresistance (SV-GMR) sensor. To obtain the ECT signal in the same scanning line, SV-GMR sensors are mounted on the exciting coil in the same column parallel with the scanning direction. Harmonic analysis based on the Fourier transform is used to analyze the signal from the SV-GMR sensor in order to increase scanning speed. Then signal averaging is applied to the ECT signal in order to improve the signal-to-noise ratio. Experimental results are performed to verify the inspection performance. Institute of Electrical and Electronics Engineers IEEE 2007-06-01 2017-10-03 eng journal article VoR http://hdl.handle.net/2297/48303 https://kanazawa-u.repo.nii.ac.jp/records/9509 10.1109/TMAG.2007.893480 AA00667933 0018-9464 IEEE Transactions on Maggetics 43 6 2394 2396 https://kanazawa-u.repo.nii.ac.jp/record/9509/files/TE-PR-YAMADA-S-272.pdf application/pdf 1.0 MB 2017-10-03