Metal working – Method of mechanical manufacture – Electrical device making
Patent
1988-11-25
1990-04-10
Arbes, Carl J.
Metal working
Method of mechanical manufacture
Electrical device making
2940203, 2940206, 156664, 264 61, 437205, H05K 306
Patent
active
049148133
ABSTRACT:
The invention is directed to a process for refurbishing of prior used laminated ceramic packages with the example shown as a pin grid array ceramic package which includes a ceramic substrate with a central opening or cavity, a plurality of conductors are embedded therein in one or more layers which have electrical condtinuity from the outer edge thereof to the central opening (this continuity path may extend through one or more layers) and to an equal plurality of conductive pads on the surface of the substrate. The bottom surface of the cavity may be enclosed by a metallic heat sink cover, an electronic chip (die) is adhered by silver glass or other adhering substance to the bottom surface of the cavity and electrically connected via small diameter conductors to the ends of the plurality of embedded conductors adjacent to the central opening, a plurality of pins are physically and conductively attached to each of the conductive pad on the surface of the substrate and a cover attached over the chip for covering the electronic chip and conductors. In effect the laminated ceramic packages assembled as hereinbefore mentioned are precision reverse manufactured or stripped down by specific steps to a bare ceramic substrate and rebuilt to its original configuration for reuse.
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Fulinara Napoleon
Layher Francis W.
Arbes Carl J.
Gilliam Frank D.
Innovative Packing Technology
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