Patent ID: 11894286
Assignee: BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A method of manufacturing a hermetically sealed electronics module, the method comprising:
a) providing an interconnecting substrate;
b) installing a plurality of core integrated circuits (IC) on the substrate;
c) hermetically bonding a bottom edge of a collar to the substrate so that the collar is in surrounding relationship with the core IC;
d) providing a lid configured for hermetic attachment to a top edge of the collar;
e) bonding a heat spreader to an inward-facing surface of the lid, the heat spreader being configured such that when the lid is hermetically attached to the collar, the heat spreader will be positioned over the core IC within the hermetically sealed chamber, and will extend downward from the lid into proximal, thermal contact with an upper surface of the core IC, said heat spreader being placed such that the heat spreader overlaps the core IC and any components shorter than the core IC but does not overlap any components taller than the core IC; and
f) hermetically attaching the lid to the top edge of the collar, the lid, collar, and substrate together thereby forming and enclosing a hermetically sealed chamber that contains the core IC;
wherein the heat spreader extends downward from the lid into proximal thermal contact with upper surfaces of all the core ICs; and
wherein at least two of the core ICs differ in height, and wherein a thickness of the heat spreader is non-uniform, and is varied so as to be proximal to the upper surfaces of the core ICs according to their heights.