Patent ID: 7391227

Claim:
A sheet-like probe suitable for use in electrical inspection of a circuit device, which comprises a frame plate made of a metal, in which a plurality of through-holes each extending through in a thickness-wise direction of the frame plate have been formed corresponding to an electrode region, in which electrodes to be inspected have been formed, of the circuit device, which is an object of inspection, and a plurality of contact films supported by a peripheral portion about the respective through-holes in the frame plate, wherein each of the contact films is composed of an insulating film formed of a flexible resin and electrode structures extending through the insulating film in a thickness-wise direction thereof, arranged in accordance with a pattern corresponding to a pattern of the electrodes to be inspected in the electrode region and each having a front-surface electrode part exposed to a front surface of the contact films and a back-surface electrode part exposed to a back surface of the contact films, and each of the electrode structures is arranged so as to be located in the respective through-hole in the frame plate wherein the front-surface electrode part in each of the electrode structures is in a projected form protruding from the front surface of the insulating film and wherein a ratio of the projected height of the front-surface electrode part to the diameter thereof in the electrode structure is from 0.2 to 3.