Feedthrough connector for hermetically sealed electronic devices
Disclosed herein is one embodiment of an apparatus that includes a housing that defines an interior cavity. The housing also includes a spring aperture. The apparatus further includes a spring coupled to the housing over the spring aperture, with the spring having a deflection portion and a feedthrough aperture. The apparatus also has an electrical connector coupled to the spring and extending through the feedthrough aperture and the spring aperture. The electrical connector may have a plurality of electrical traces extending from a location external to the housing to a location within the interior cavity of the housing.
1. An apparatus, comprising:
a housing defining an interior cavity, the housing comprising a spring aperture;
a spring coupled to the housing over the spring aperture to at least partially cover the spring aperture, wherein the spring comprises a deflection portion and a feedthrough aperture; and
an electrical connector comprising an insulated base directly coupled to the spring and extending through the feedthrough aperture and the spring aperture, the insulated base comprising a sealing portion to form a seal with the spring, an outwardly positioned portion partially exterior to the housing, and an inwardly positioned portion partially within the interior cavity of the housing.
2. The apparatus of claim 1 , wherein the electrical connector is indirectly coupled to the housing via the spring.
3. The apparatus of claim 1 , further comprising at least one support bracket coupled to the housing, wherein the at least one support bracket is in supporting engagement with the electrical connector.
4. The apparatus of claim 3 , wherein the electrical connector is indirectly coupled to the housing via the spring and the at least one support bracket.
5. The apparatus of claim 1 , wherein the deflection portion of the spring absorbs thermal expansion of one or more of the electrical connector and the housing.
6. The apparatus of claim 1 , wherein the deflection portion extends entirely around the feedthrough aperture.
7. The apparatus of claim 1 , wherein the deflection portion comprises a rectangular footprint.
8. The apparatus of claim 1 , wherein the deflection portion comprises an ovular footprint.
9. The apparatus of claim 1 , wherein the spring comprises multiple, spaced-apart deflection portions.
10. The apparatus of claim 1 , wherein the spring is directly coupled to an external surface of the housing adjacent the spring aperture.
11. The apparatus of claim 1 , wherein the spring is directly coupled to a sidewall of the spring aperture of the housing.
12. The apparatus of claim 1 , wherein a first seal between the spring and the housing and a second seal between the spring and the electrical connector maintain the interior cavity as a hermetically sealed environment.
13. The apparatus of claim 12 , wherein the interior cavity contains a helium-enriched environment.
14. The apparatus of claim 12 , wherein at least one of the first seal and the second seal comprises one or more of solder, adhesive, and epoxy, the epoxy having a low helium permeability.
15. A hard disk drive, comprising:
a hermetically sealed housing defining and substantially isolating an interior cavity containing a helium enriched environment from an exterior atmosphere, the housing comprising a spring aperture having a first cross-sectional area;
a spring coupled to the hermetically sealed housing over the spring aperture, wherein the spring comprises a deflection portion and a feedthrough aperture, the feedthrough aperture having a second cross-sectional area smaller than the first cross-sectional area; and
an electrical connector comprising an insulated base directly coupled to the spring and extending through the feedthrough aperture and the spring aperture, the insulated base comprising a sealing portion to form a seal with the spring, an outwardly position portion partially exterior to the housing, and an inwardly positioned portion partially within the interior cavity of the housing the electrical connector comprising a plurality of electrical traces extending from a location external to the hermetically sealed housing to a location within the interior cavity of the hermetically sealed housing.