Hermetically sealed, weldable connectors
View Patent ↗An RF feed-through connector has a single pin or multi-pins supported and hermetically sealed between a first portion of the connector facing the hermetically sealed interior portion of an electronics-containing housing and a second portion of the connector exposed to ambient conditions in which the electronics-containing housing is placed. The invention is particularly directed to a new hermetically sealed RF feed-through connector architecture in which the connector's outer shell contains a relatively low coefficient of thermal expansion (CTE) portion that enables it to be soldered to a low CTE insert that supports one or more hermetically sealed longitudinal signal pins. The connector's outer shell also includes a relatively high CTE portion that allows the shell to be readily joined as by welding to an adjacent support structure, such as a relatively high CTE aluminum housing and the like.
1. A multipin connector for hermetically sealing a plurality of conductor pins therein, comprising a metallic shell of a first coefficient of thermal expansion (CTE) material and having a plurality of apertures therethrough that are sized to receive a corresponding plurality of conductor pins, and hermetically sealing dielectric material sealing said conductor pins within said plurality of apertures, and a solder joint formed between said metallic shell and a first portion of an outer metallic shell which has coefficient of thermal expansion (CTE), proximate said first CTE, said outer metallic shell including a second portion which has a second CTE, higher than said first CTE, so as to facilitate bonding of said second portion of said outer metallic shell to a high CTE support structure, wherein said first portion of said outer metallic shell contains ceramic particulate material distributed therethrough so as to lower the CTE thereof from a value on the order of said second CTE to said first CTE.
2. The multipin connector according to claim 1 , wherein said first portion of said outer metallic shell comprises a first metal and second portion of said outer metallic shell comprises a second metal different from said first metal and being joined with said first metal.
3. The multipin connector according to claim 1 , wherein respective ones of said multi-conductor pins are solid with and coaxial with associated sockets that are sized to receive associated pins of a multipin plug type connector.