International Business Machines Corporation

Dennis Felix Clocher

Joseph John Lisowski

Joseph L Temple, Iii

Glenn Graham Daves

Joseph Michael Sullivan

Michael Gerard Nealon

Peter M Elenius

John J Ellison

A pre-production, prototype multi-chip module adapted for preliminary performance timing and functional tests includes a plurality of chips attached to a substrate. Multiple nets are embedded within the substrate connecting the chips. A layer over the substrate encapsulates the chips. Production input/output pins on the substrate are connected to the chips. An area on the upper surface of the module is not covered by the encapsulating layer, which contains upper pads adapted for connection of a second module containing spare circuits to the substrate, wherein the upper pads are connected to the at least one net. Some of the upper pads have connections to each other near the surface of the encapsulating layer, wherein the connections are adapted to be severed for connecting a second module containing spare circuits to one or more of the chips.

Prototyping multichip module

A high performance, low cost multi-chip module package using a heatsink as a substrate with thin film wiring techniques or multilayered wiring techniques for interconnection of the chips on the surface of the module and a solder column grid array or solder ball grid array for interconnection to the next level of packaging (printed circuit board). The columns or balls create a space between the board and module with the chips being in the space and provide the required interconnect density.

High performance, low cost multi-chip modle package

Growing community of inventors

Milton, NY, United States of America

Dennis Felix Clocher