Patent ID: 6657131
Filing Date: 2003-12-02
Classification: H01L,H05K,Y10T

Abstract:
A retention mechanism for mounting an integrated circuit package to a circuit board, comprising:a dish-shaped, elastically deformable pressure plate, having a first apex and a first periphery spaced away from the first apex, the pressure plate being deformable by applying a first force to the first periphery directed generally towards the first apex: a dish-shaped, elastically deformable backing plate, haying a second apex and a second periphery spaced away from the second apex, the backing plate being deformable by applying a second force to the second periphery directed generally towards the second apex: and means for simultaneously applying the first and second deforming forces to the first and second peripheries to engage the first apex with a surface of the integrated circuit package and the second apex with a surface of the circuit board so as to effect continuous electrical continuity between the integrated circuit package and the circuit board, wherein an average contact resistance between the integrated circuit package and the circuit board is less than about 50 milliohms.