Patent ID: 6337123
Filing Date: 2002-01-08
Classification: B32B,C04B,H01F,H01L,H05K,Y10S,Y10T

Abstract:
A sintered multilayered ceramic substrate comprising:a first substrate ceramic layer and a second substrate ceramic layer respectively comprising first and second different low-temperature sintered ceramic materials and which exude glass when sintered; and a shrinkage inhibiting layer between the first and second substrate ceramic layers, the shrinkage inhibiting layer comprising an unsintered inorganic material which does not sinter at the sintering temperature of each of the first and second low-temperature sintered ceramic materials, said unsintered inorganic material being in combination with glass permeated into said shrinkage inhibiting layer during firing of the first and second low-temperature sintered ceramic materials contained in the first and second substrate ceramic layers, wherein said first substrate ceramic layer, second substrate ceramic layer and shrinkage inhibiting layer are cosintered layers.