Patent ID: 6535010
Filing Date: 2003-03-18
Classification: G01R

Abstract:
A checker head comprising:a front plate in which a front through hole is formed and which has a front surface configured to face an object to be inspected; a rear plate in which a rear through hole is formed to correspond to said front through hole of said front plate; an intermediate plate in which an intermediate through hole is formed to correspond to said front and rear through holes and which is sandwiched between said front plate and said rear plate; an electro-conductive contact pin having a front tip part and a rear brim part which has a diameter larger than that of the front through hole, the front tip part protruding from the front surface of said front plate and configured to contact the object to be inspected, the contact pin being positioned such that the rear brim part is located in the intermediate through hole; a conductive wire inserted into said rear through hole of said rear plate and bonded to said rear plate; an electro-conductive spring provided in the intermediate through hole between said conductive wire and said rear brim part of said contact pin in a compressed state, said spring electrically connecting said contact pin and said conductive wire, said spring directly contacting one end of said conductive wire; and said one end of said conductive wire and a front surface of the rear plate which faces the intermediate plate being substantially on a same plane.