Method of forming recessed patterns in insulating substrates

Details Method of forming recessed patterns in insulating substrates Method of forming recessed patterns in insulating substrates

1992-06-01

1993-08-31

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

29851, 264241, 264264, 264 58, B22F 704, H01K 322

Patent

active

052406717

ABSTRACT:
A method of forming recessed patterns in insulators is described. One embodiment of the invention is directed to ceramic green sheet fabrication by providing a sculptured plastic tape mold which includes a floor, a plurality of sidewalls adjacent to and extending above the floor and a plurality of protrusions on and extending above the floor, casting a ceramic slurry into the mold such that the slurry contacts the floor, the sidewalls and the protrusions, and drying the slurry so as to produce a ceramic green sheet with a recessed pattern that replicates the shapes of the protrusions. The ceramic green sheet may be removed from the mold and filled with a conductor before firing; alternatively, the ceramic green sheet can be fired before removing the mold to form a rigid ceramic substrate which is then filled with a conductor.

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