Patent ID: 6954065

Claim:
An eddy-current probe comprising: a substrate having a first surface facing to a subject to be tested and a second surface opposite to said first surface; an exciting coil formed on said second surface, having a pair of current lines in parallel with each other through which exciting currents flow in opposite directions to each other during testing, for generating an alternate magnetic field applied to said subject by said exciting currents; at least one eddy-current sensor positioned on a central axis between said pair of current lines on said second surface of said substrate, for detecting a magnetic field generated newly from said subject by an eddy-current induced by said alternate magnetic field; said substrate having a non-planar form having at least one convex-surface portion on said first surface; and said at least one eddy-current sensor formed on at least one concave-surface portion formed on said second surface, which is corresponding to said at least one convex-surface portion.