Patent ID: 6245171
Filing Date: 2001-06-12
Classification: B32B,C04B,H01L,H05K,Y10S,Y10T

Abstract:
A method of fabricating at least one multi-density semiconductor substrate comprising the steps of:(a) formiing at least one electrically conductive feature on at least one thick green sheet, wherein said at least one thick green sheet comprises at least one ceramic material;(b) providing at least one thin green sheet with at least one via hole, wherein said at least one thin green sheet comprises at least one ceramic material, and wherein said at least one thin green sheet is thinner than said at least one thick green sheet;(c) aligning and placing said at least one thin green sheet over said at least one thick green sheet, such that at least a portion of said electrically conductive feature is in contact with at least a portion of said via hole;(d) dusting lamination surfaces with at least one inorganic adhesion barrier powder which comprises a material selected from the group consisting of the at least one ceramic material of said thick green sheet and the at least one ceramic material of said thin green sheet;(e) tacking and bonding said at least one thin green sheet to said at least one thick green sheet using said lamination surfaces.