Patent ID: 7127809

Claim:
A method of forming at least a first multilayered base having a first predetermined pattern on one surface of a multi-surfaced LTCC module comprised of a stack of ceramic layers fired at a first cofired temperature, comprising the steps of: applying a first plurality of metal layers, including an adhesion layer, one or more intermediate layers and a top layer, in said first predetermined pattern to build up a desired thickness of said first multilayered base, and firing said module after application of predetermined ones of said plurality of metal layers at a second temperature lower than said first, cofired temperature, said second temperature having a value to partially sinter said plurality of metal layers of said first base; and which includes the steps of sequentially applying said metal layers to said one surface and allowing each of said metal layers to dry and then firing each of said layers at said second temperature before applying a subsequent metal layer; and a) if other bases in addition to said first base are to be formed; only firing said module at said second temperature to partially sinter said metal layers in said first base; but b) if no further bases are to be formed, again firing said module including said first base at an elevated temperature greater than said second temperature substantially equivalent to said first cofired temperature to fully sinter all said metal layers in said first base said first base receiving a first predetermined component on said one surface of said module.