Patent ID: 6228468
Filing Date: 2001-05-08
Classification: C04B,H01L,H05K,Y10S,Y10T

Abstract:
A multilayer ceramic substrate for an integrated circuit package comprising:a first layer formed of a ceramic material comprising a mixture of MgO and a glass, said material including 50 to 99 percent MgO by weight, and having a coefficient of expansion greater than about 5 PPM/.degree. C. and less than about 16 PPM/.degree. C.; anda second layer formed of a ceramic material coupled to said first layer, said second layer comprising a mixture of MgO and a glass, said material including 50 to 99 percent MgO by weight, and having a coefficient of expansion greater than about 5 PPM/.degree. C. and less than about 16 PPM/.degree. C.