Patent ID: 6597192
Filing Date: 2003-07-22
Classification: G01R

Abstract:
A method for performing a functional test of a semiconductor device, comprising the steps of(a) sandwiching an anisotropic conductive film between a semiconductor device and a circuit board for the test which permits functionally testable conduction between the device and the circuit board, (b) applying pressure to create a contact load of 3-50 gf per one electrode of the device to achieve functionally testable conduction between the device and the circuit board, wherein the anisotropic conductive film deforms by 5-30 &mgr;m due to the contact load, thereby absorbing warp and/or waviness in the device and/or the circuit board; (c) carrying out the functional test of the device; and (d) removing the device from the anisotropic conductive film; wherein the anisotropic conductive film comprises a film substrate having two major opposing surfaces and comprising an insulating resin; and plural conductive paths each having a total length of 60-500 &mgr;m, comprising a conductive material, which penetrate the film substrate in the thickness direction, which protrude from the two major opposing surfaces of the film substrate, and wherein each of said paths is insulated from each other of said paths; and wherein the film as a whole has an elastic modulus of 0.1-1.0 GPa at 25-150Â° C.