Patent ID: 6097085
Filing Date: 2000-08-01
Classification: H01L

Abstract:
An electronic device, comprising:a wiring substrate having connecting terminals formed on one main face thereof:a semiconductor package having:a wiring film having a device hole, external connecting terminals, and inner leads, the external connecting terminals and the inner leads being formed on one face thereof,a semiconductor element disposed in the device hole and electrically connected to the inner leads, anda shape-holding plate composed of a metal having a thermal expansion coefficient almost close to that of the wiring substrate, the shape-holding plate being disposed in a region that surrounds the device hole on the other main face of the wiring film; andbumps for electrically and mechanically connecting the external connecting terminals of the semiconductor package and the connecting terminals of the wiring substrate,wherein the shape-holding plate is composed of 25Cr-20Ni stainless steel or copper alloy containing 0.01 to 0.03% by weight of Zr.