Patent ID: 6139666
Filing Date: 2000-10-31
Classification: B32B,C04B,H01L,H05K

Abstract:
A method for making multilayer ceramic substrates having enhanced dimensional integrity from ceramic greensheets by sintering comprising the steps of:stacking a plurality of greensheets having metallurgical circuitry within and whereon and which will form a multilayer ceramic substrate when sintered;forming a contact sheet comprising a non-sinterable, non-metallic inorganic material and an organic binder;positioning the contact sheet on at least one surface of the stack;forming a laminate by adhering the contact sheet and greensheets together to form a contact sheet containing stack;forming a chamfer around the edges of the contact sheet containing stack to form a chamfered contact sheet containing stack, the chamfer angle being greater than about 60.degree. in relation to the surface of the contact sheet;sintering the chamfered contact sheet containing stack to form a multilayer ceramic substrate; andremoving the contact sheet.