Patent ID: 6733822
Filing Date: 2004-05-11
Classification: C04B,H01L,H05K

Abstract:
A process for producing a sintered aluminum nitride furnished with via holes, comprising providing an aluminum nitride molding having through-holes for via hole formation and through-holes for formation of dummy via holes not used for electrical connection, wherein the through-holes for formation of dummy via holes are distributed within the aluminum nitride molding, filling the through-holes for via hole formation and the through-holes for dummy via hole formation with a conductive paste and firing the aluminum nitride molding and conductive paste,wherein the aluminum nitride molding is furnished with the through-holes for via hole formation and the through-holes for dummy via hole formation so that the through-holes for via hole formation having been filled with the conductive paste and the aluminum nitride molding respectively exhibit a firing shrinkage factor of the through-hole for via hole formation (Xv, %) and a firing shrinkage factor of the aluminum nitride molding (Xs, %) whose difference, Xv-Xs, is in the range of âˆ’1.0 to 9.5%.