Patent ID: 7049836
Filing Date: 2006-05-23
Classification: G01R,H01L

Abstract:
1. An anisotropically conductive connector for electrically connecting a circuit board for inspection to a wafer by being arranged on a surface of the circuit board for inspection for conducting electrical inspection of each of a plurality of integrated circuits formed on a wafer in a state of a wafer, which comprises: a frame plate, in which a plurality of anisotropically conductive film-arranging holes each extending in a thickness-wise direction of the frame plate have been formed correspondingly to electrode regions, in which electrodes to be inspected have been arranged, in all or part of the integrated circuits formed on the wafer, which is an object of inspection, and a plurality of elastic anisotropically conductive films arranged in the respective anisotropically conductive film-arranging holes in this frame plate and each supported by the peripheral edge about the anisotropically conductive film-arranging hole, wherein each of the elastic anisotropically conductive films is composed of a functional part having a plurality of conductive parts for connection containing conductive particles exhibiting magnetism at a high density and extending in the thickness-wise direction of the film, and arranged correspondingly to the electrodes to be inspected in the integrated circuits formed on the wafer, which is the object of inspection, and an insulating part mutually insulating these conductive parts for connection, and a part to be supported integrally formed at a peripheral edge of the functional part and fixed to the peripheral edge about the anisotropically conductive film-arranging hole in the frame plate, wherein supposing that the shortest width of each of the conductive parts for connection is W, and the number average particle diameter of the conductive particles is Dn, a value of a ratio W/Dn of the shortest width of the conductive part for connection to the number average particle diameter of the conductive particles falls within a range of 3 to 8, and a coefficient of variation of particle diameter of the conductive particles is at most 50%, wherein supposing that the weight average particle diameter of the conductive particles is Dw, a value of a ratio Dw/Dn of the weight average particle diameter to the number average particle diameter is at most 5, and wherein the number average particle diameter of the conductive particles is 3 to 30 μm.