Patent ID: 7541823

Claim:
An inspection apparatus for circuit board for measuring an electric resistance of an inspection object circuit board by electrically connecting a pair of inspection electrodes formed of an electrode for current supply and an electrode for voltage measurement arranged in relation separated from each other to each of a plurality of inspection object electrodes formed on the inspection object circuit board, through an anisotropically conductive sheet, comprising: an upper-side board-compressing member arranged on an upper side of the inspection object circuit board and having an anisotropically conductive sheet on its surface, and a lower-side board-compressing member arranged on a lower side of the inspection object circuit board and having an anisotropically conductive sheet on its surface, wherein the upper-side board-compressing member and the lower-side board-compressing member each have plural pairs of inspection electrodes and are respectively provided on base plates supported by a plurality of supports infixed into support-infixing plates, and upper-side supporting points correspond to the upper-side supports on the upper-side base plate related to the upper-side board-compressing member and lower-side supporting points correspond to the lower-side supports on the lower-side base plate related to the lower-side board-compressing member are arranged at positions different from each other on a plane of projection in a thickness-wise direction of the upper-side board-compressing member and the lower-side board-compressing member when the inspection apparatus is seen through from above, and wherein the upper-side supporting points and the lower-side supporting points are formed in a lattice on the upper-side base plate and on the lower-side base plate, respectively, and on the plane of projection in the thickness-wise direction of the upper-side board-compressing member and the lower-side board-compressing member, only one of the lower-side supporting points is arranged within an upper-side unit region partitioned by adjacent 4 of the upper-side supporting points, and only one of the upper-side supporting points is arranged within a lower-side unit region partitioned by adjacent 4 of the lower-side supporting points.