Patent ID: 7187166
Filing Date: 2007-03-06
Classification: B82Y,G01Q

Abstract:
1. An electrical property evaluation apparatus for measuring an electrical property of an object, comprising: a magnetic field generating mechanism that generates a magnetic field in a target area on an object to be measured, the magnetic field generating mechanism including a pair of magnetic field coils, each magnetic field coil having a magnetic role member, and the magnetic field coils being located opposite to each other; a magnetic sensor for measuring the magnetic field near the target area; a cantilever having a conducting probe, the cantilever being supported so that the probe can be brought into contact with the target area, and the cantilever and the magnetic sensor being located in a center location between the pair of magnetic pole members; a moving mechanism that moves the cantilever relative to the object to carry our scanning while keeping the probe in contact with the object; a bending measurement mechanism that measures an amount of bending of the cantilever when the probe is brought into contact with the object; a control section that controls the moving mechanism so as to maintain the bending amount of the cantilever constant; a voltage source for applying a voltage to the probe; and an electrical property measuring section that measures a current or an electrical resistance between the probe and the object in contact with each other.