Patent ID: 6511866
Filing Date: 2003-01-28
Classification: H01L

Abstract:
A process for encasing a semiconductor circuit device to form a sealed air-cavity package, said process comprising:(a) soldering said semiconductor circuit device to a heat-conductive base at a temperature in excess of 250Â° C.; (b) affixing a plastic frame of sidewalls over said heat-conductive base after the completion of step (a) by forming a seal between said side walls and said heat-conductive base at a temperature lower than 200Â° C., thereby forming a partial enclosure around said semiconductor circuit device, said plastic frame or said heat-conductive base having been preformed with electrically conductive leads such that said leads penetrate said partial enclosure; (c) electrically connecting the circuit of said semiconductor circuit device to said leads; and (d) affixing a lid to said partial enclosure thereby encasing said semiconductor circuit device in a housing that is substantially impermeable to gases.