Patent ID: 7930820

Claim:
A method for insulating a mechanical stiffener from a printed circuit board on which a multi-chip module (MCM) is to be mounted, to form an MCM package, the method comprising: mounting the multi-chip module to the printed circuit board against the mechanical stiffener with a non-compressible thermo-conducting gel package placed between the printed circuit board and the mechanical stiffener, the gel package being formed as a self-conforming insulator structure comprising a cushion, of two separate insulating layers of film, filled with a non-compressible thermo-conducting gel paste insulating material; and pressing the multi-chip module and the mechanical stiffener together to apply pressure to the gel package between the printed circuit board and the mechanical stiffener, thereby to cause compression between the printed circuit board and the mechanical stiffener to cause the gel package to conform to any irregularities and fill any voids between the printed circuit board and the mechanical stiffener; the mechanical stiffener being formed with a channel extending along a periphery of the gel package, whereby excess material resulting from compression of the gel package between the printed circuit board and the mechanical stiffener flows into the channel.