Patent ID: 7131851

Claim:
An anisotropically conductive connector for electrically connecting a circuit board for inspection to a wafer by being arranged on the surface of the circuit board for inspection for conducting electrical inspection of each of a plurality of integrated circuits formed on the wafer in a state of the 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 formed of an elastic polymeric substance, 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 the conductive particles contained in the conductive part for connection in the elastic anisotropically conductive film are obtained by coating the surfaces of core particles exhibiting magnetism with a high-conductive metal, a proportion of the high-conductive metal to the core particles is at least 15% by mass, and the thickness t of the coating layer formed of the high-conductive metal, which is calculated out in accordance with the following equation (1), is at least 50 nm, and wherein the elastic polymeric substance forming the elastic anisotropically conductive films is a cured product of addition type liquid silicone rubber, whose compression set is at most 10% at 150° C. and whose durometer A hardness is 10 to 60: t =[1/ Sw·ρ )]×[ N /(1− N )]Equation (1) wherein t is the thickness (m) of the coating layer formed of the high-conductive metal, Sw is a BET specific surface area (m 2/ kg) of the core particles, ρ is a specific gravity (kg/m 3 ) of the high-conductive metal, and N is a value of (mass of the high-conductive metal/total mass of the conductive particles).