Patent ID: 6733607
Filing Date: 2004-05-11
Classification: H01L

Abstract:
A method for forming a low temperature cofired ceramic (LTCC) device, comprising the steps of:(a) forming a channel in at least a first LTCC tape layer; (b) inserting a wax in the channel, the wax being of a type that burns out at a temperature below a sintering temperature of the first LTCC tape layer; (c) stacking at least a second LTCC tape layer on the first LTCC tape layer to form a stack; (d) Pressing the stack sufficiently for the first and second layers to bond into a laminate; and (e) firing the laminate at the sintering temperature to form a sintered ceramic structure from the first and second LTCC tape layers, whereby all or substantially all of the wax is burned out from the channel; wherein the wax is in granular form during step (b); wherein the wax is a blend of polypropylene and paraffin.