Patent ID: 7489147

Claim:
An apparatus for inspecting a circuit board which interposes both sides of a circuit board to be inspected between a first inspecting jig and a second inspecting jig by the first inspecting jig and the second inspecting jig exerting pressure on the circuit board, thereby carrying out an electrical inspection, each of the first inspecting jig and the second inspecting jig comprising: a circuit board side connector including: a board for pitch conversion configured to convert an electrode pitch between one surface of the circuit board and an other surface of the circuit board; a relay board disposed on a first side of the circuit board having a plurality of rigid conductor electrodes penetrating through the relay board which is held to be movable in a direction of a thickness of the relay board, and configured to relay an electrical connection of an inspection electrode of the board for pitch conversion to an electrode to be inspected in the circuit board through the rigid conductor electrodes; a pair of first anisotropically conductive sheets disposed on one surface side and the other surface side of the relay board and having a conductive particle arranged in a direction of a thickness and distributed uniformly in a planar direction; and a second anisotropically conductive sheet provided on a second side of the circuit board, opposite to the first side of the circuit board; a relay pin unit including: a plurality of conductive pins provided at a predetermined pitch; and a first insulating plate and a second insulating plate which are separated from each other, the first insulating plate and the second insulating plate configured to support the conductive pins movably in an axial direction; and a tester side connector including: a connector board for electrically connecting a tester to the relay pin unit; a third anisotropically conductive sheet provided on a first side of the connector board closest to the relay pin unit; and a base plate provided on a second side of the connector board, opposite to the first side, wherein the relay pin unit includes an intermediate holding plate provided between the first insulating plate and the second insulating plate, a first support pin provided between the first insulating plate and the intermediate holding plate, and a second support pin provided between the second insulating plate and the intermediate holding plate, and a first abutment support position of the first support pin with respect to the intermediate holding plate and a second abutment support position of the second support pin with respect to the intermediate holding plate are placed differently from each other over an intermediate holding plate projecting surface which is projected in a direction of a thickness of the intermediate holding plate.