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Improvement on Defect Detection Performance of PCB Inspection Based on ECT Technique With Multi-SV-GMR Sensor Chomsuwan, K. 13727 Yamada, Sotoshi 11069 80019786 80019786 Iwahara, Masayoshi 11068 80020212 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. journal article Institute of Electrical and Electronics Engineers IEEE 2007-06-01 VoR application/pdf IEEE Transactions on Maggetics 6 43 2394 2396 AA00667933 0018-9464 https://kanazawa-u.repo.nii.ac.jp/record/9509/files/TE-PR-YAMADA-S-272.pdf http://hdl.handle.net/2297/48303 https://kanazawa-u.repo.nii.ac.jp/records/9509 eng 10.1109/TMAG.2007.893480 © 2007 IEEE.