초록 ▼

A hermetically sealed protective package for a space-deployable electronic circuit includes a pressure relief valve. The pressure relief valve is closed during assembly and testing of the circuit in an earth borne environment, so as to prevent the entry of moisture and foreign matter and maintain pr

A hermetically sealed protective package for a space-deployable electronic circuit includes a pressure relief valve. The pressure relief valve is closed during assembly and testing of the circuit in an earth borne environment, so as to prevent the entry of moisture and foreign matter and maintain pressure equalization between the interior volume and the exterior of the hermetically sealed package. The valve is opened when the package is placed in the `clean' vacuum ambient of a spaceborne environment, so as to vent atmospheric pressure from the interior volume of the package and prevent differential pressure-induced stresses on the package.

대표청구항 ▼

1. A protection packaging structure for a space-deployable electronic circuit comprising:a hermetically sealed enclosure having an interior volume containing said electronic circuit at a pressure on the order of atmospheric pressure in an earthborne environment, so as to provide for pressure equaliz

1. A protection packaging structure for a space-deployable electronic circuit comprising:a hermetically sealed enclosure having an interior volume containing said electronic circuit at a pressure on the order of atmospheric pressure in an earthborne environment, so as to provide for pressure equalization between said interior volume and the exterior of said hermetically sealed enclosure when said protection packaging structure is in said earthborne environment; and a pressure relief valve coupled with said hermetically sealed enclosure, said pressure relief valve being closed in said earthborne environment, so as to prevent the entry of moisture and foreign matter, and also maintain pressure equalization between said interior volume and the exterior of said hermetically sealed enclosure when said protection packaging structure is in said earthborne environment, and thereafter being opened when said protection packaging structure is in a spaceborne environment, so as to vent atmospheric pressure therefrom and thereby provide for pressure equalization between said interior volume and the exterior of said hermetically sealed enclosure.