Apparatus and method for producing a magnetic image of a conductive pattern using eddy currents

摘要

An apparatus and method for providing a fine line resistance image of a conductive pattern. A magnetic recording medium is placed in close proximity to the conductive pattern and a varying magnetic field is applied to the conductive pattern such that eddy currents in the conductive pattern are created. The eddy currents produce a magnetization pattern indicative of line resistance. The applied magnetic field is time varying and the varying magnetic field may be applied perpendicular to the recording medium or it may be applied in the plane of the recording medium.