Patent ID: 6646455
Filing Date: 2003-11-11
Classification: G01R

Abstract:
A test probe for testing operability of semiconductor devices, said test probe comprising a tip portion which is pressed against a test pad of a semiconductor device to establish electrical contact between said tip portion and said test pad, wherein said test probe is formed to have a tip shape with an angle of not less than 15 degrees formed at a surface of said test pad between a tangential line with respect to a tip face of said test probe and said pad surface when said test probe is pressed against said test pad, the tip shape of said test probe having a spherical surface meeting a relationship of:&thgr;=cosâˆ’1 (1âˆ’t/R)&gE;15Â°where a radius of curvature of said spherical surface is R, a thickness of said test pad is t, and the angle formed at said pad surface between the tangential line with respect to said tip face and said pad surface when said test probe is pressed against said test pad is 0, said test probe having a flat portion at an end of said tip portion.