Patent ID: 6448195
Filing Date: 2002-09-10
Classification: C03C,C04B,H01L,H05K,Y10S,Y10T

Abstract:
A composition for a ceramic substrate comprising a mixture of:powdered borosilicate glass comprising about 5% to 17.5% by weight of B2O3, about 28% to 44% by weight of SiO2, 0% to about 20% by weight of Al2O3 and about 36% to 50% by weight of MO, wherein MO is at least one member selected from the group consisting of CaO, MgO and BaO; and a powdered ceramic; in which the amount of the powdered borosilicate glass is about 40% to 49% by weight based on the total amount of the composition for a ceramic substrate, and the amount of the powdered ceramic is about 60% to 51% by weight based on the total amount of the composition for a ceramic substrate, and the composition after sintering comprises a precipitated crystal phase comprising alumina and wollastonite.