Electricity: conductors and insulators – Boxes and housings – Hermetic sealed envelope type
Patent
1990-01-16
1991-11-12
Picard, Leo P.
Electricity: conductors and insulators
Boxes and housings
Hermetic sealed envelope type
357 74, H01L 2302
Patent
active
050649680
ABSTRACT:
An integrated circuit package includes a rectangular base, and a continuous sidewall which extends upwardly from the periphery of the base. Microelectronic circuit components are mounted on the base in a cavity defined within the sidewall. A domed lid includes a resilient central domed portion which arches above the cavity. A peripheral edge portion of the lid extends downwardly into the cavity by a small distance, adjacent to the inner surface of the sidewall. A lip extends outwardly from the edge portion and is sealingly welded at its periphery to the upper surface of the sidewall. The joint between the lip and edge portion is resilient and acts as a hinge, such that when a force or pressure is applied to the domed portion, the edge portion rotates about the hinge into abutment with the inner surface of the sidewall. This transfers a major component of the applied force to the sidewall, and resists deflection of the domed portion into the cavity.
REFERENCES:
patent: 3836697 (1974-09-01), Schultz
patent: 4126758 (1978-11-01), Krumme
patent: 4717948 (1988-01-01), Sakai et al.
Congleton Helen
Ehlert Michael R.
Kovacs Alan L.
Denson-Low W. K.
Gudmestad Terje
Hughes Aircraft Company
Ledynh Bot L.
Picard Leo P.
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