1. Eddy current testing probe composed of planar coils
2. 2) S. Yamada, H. Fujiki, M. Iwahara, S. C. Mukhopadhyay and F. P. Dawson : Investigation of Printed Wiring Board Testing By Using Planar Coil type ECT Probe, IEEE Trans, on Magnetics, Vol.22, No.5, 3376-3379 (1997).
3. 3) D. Kacprzak, T. Miyagoshi, S. Yamada and M. Iwahara : Investigation of Printed Wiring Board Testing By Using Planar Coil Type ECT Probe, Digest of INTERMAG 99, GR-04 (1999).
4. 4) M. Oka : A Detection of Backside Crack using Torational Magnetic Flux Sensor with Search Coils, IEEE Trans, on Magnetics, Vol.32, No.5, September (1996).
5. Defect images by planar ECT probe of meander-mesh coils