Apparatus for inspecting circuit board and method of inspecting circuit board

Abstract

An apparatus and method for inspecting a circuit board is described which can well absorb a variation in a height of an electrode to be inspected and can maintain an insulating property between adjacent inspection electrodes even if the electrode to be inspected is arranged at a fine pitch.

1 . A relay board that includes a board through which a plurality of rigid conductor electrodes penetrate, wherein the plurality of rigid conductor electrodes is held to be movable in a direction of a thickness of the board,
 the board has an insulating property and a plurality of through holes is formed on the board,   the rigid conductor electrode includes a drum portion inserted in the through holes and a terminal portion formed on each end of the drum portion, each having a larger diameter than a diameter of the through hole, and   the rigid conductor electrode is held in the through hole of the board so as to be movable in the direction of the thickness of the board such that the distance between the terminal portion and an opening of the through hole changes.   
   
   
       2 . The relay board according to  claim 1 , wherein a plurality of through holes is formed on the board, an insulating portion formed by a polymeric elastic body is formed in the through holes, and the rigid conductor electrode penetrates through the insulating portion and is held to be movable in the direction of the thickness of the board by means of the insulating portion. 
   
   
       3 . A circuit board side connector that includes:
 the relay board according to  claim 1 ;   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;   a board for pitch conversion which converts an electrode pitch between one of surface sides of the board and the other surface side; and   a second anisotropically conductive sheet provided on a reverse side to the circuit board to be inspected in the board for pitch conversion.   
   
   
       4 . The relay board according to  claim 1 ,
 wherein the board is comprised of a material having a higher mechanical strength than materials formed by a composite resin material such as a glass fiber reinforced polyimide resin, a glass fiber reinforced epoxy resin, or a glass fiber reinforced bismaleimide triazine resin.