ELECTRICAL FEEDTHROUGH IN A METAL WALL OF A HOUSING OF AN ACTIVE MEDICAL DEVICE AND METHOD OF MAKING THE SAME
First Claim
1. A hermetic and electrically insulating feedthrough for an electrical connection through an electrically conductive metal wall, the feedthrough comprising:
- an electrically insulating external layer on an external side of the electrically conductive metal wall;
an electrically insulating internal layer on an internal side of the electrically conductive metal wall;
a non-through groove on the internal side of the electrically conductive metal wall, the non-through groove having a closed contour defining a metal islet in the electrically conductive metal wall, wherein the metal islet is physically and electrically isolated from the rest of the electrically conductive metal wall;
an external pad on the external side of the electrically conductive metal wall, the external pad making electrical contact to the metal islet; and
an internal pad on the internal side of the electrically conductive metal wall, the internal pad making electrical contact to the metal islet.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for making an hermetic and electrically insulating feedthrough in the metal wall of a housing of a device, preferably of an active medical device, is disclosed. The method includes: a) forming electrically insulating layers (24, 26) on each of the internal and external sides of the wall (10), b) on the internal side of the wall, forming a non-through groove with a closed contour (30) defining in the wall a metal islet (28) that is physically and electrically isolated from the rest of the wall, by removing the entire thickness of the electrically insulating internal layer (26) and the wall (10), leaving intact a sufficient thickness of the electrically insulating external layer (24) so that the external layer mechanically supports the metal islet, and c) on the external and internal sides respectively, exposing pads (34, 36) for making an electrical contact to the metallic islet, by a localized removal of material of the electrically insulating external and internal layers (24, 26), respectively.
6 Citations
20 Claims
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1. A hermetic and electrically insulating feedthrough for an electrical connection through an electrically conductive metal wall, the feedthrough comprising:
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an electrically insulating external layer on an external side of the electrically conductive metal wall; an electrically insulating internal layer on an internal side of the electrically conductive metal wall; a non-through groove on the internal side of the electrically conductive metal wall, the non-through groove having a closed contour defining a metal islet in the electrically conductive metal wall, wherein the metal islet is physically and electrically isolated from the rest of the electrically conductive metal wall; an external pad on the external side of the electrically conductive metal wall, the external pad making electrical contact to the metal islet; and an internal pad on the internal side of the electrically conductive metal wall, the internal pad making electrical contact to the metal islet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A housing for a device, the housing comprising:
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a metal wall having an external side and an internal side; a hermetic and electrically insulating feedthrough for an electrical connection through the metal wall; an electrically insulating internal layer formed on the internal side of the metal wall; a metal islet defined by a non-through groove having a closed contour, the metal islet being physically and electrically isolated from the metal wall, the non-through groove extending through an entire thickness of the electrically insulating internal layer and through an entire thickness of the metal wall; and an electrically insulating external layer formed on the external side of the metal wall, wherein the electrically insulating external layer is left intact to have a sufficient thickness to mechanically support the metal islet. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A feedthrough comprising:
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an electrically conductive wall having an internal side and an external side, wherein a portion of the electrically conductive wall is electrically isolated from a remainder of the electrically conductive wall; an electrically insulating internal layer on the internal side of the electrically conductive wall, wherein the electrically insulating internal layer is absent in a region of the electrically isolated portion of the electrically conductive wall; and an electrically insulating external layer on the external side of the electrically conductive wall, wherein the electrically insulating external layer is absent in a region of the electrically isolated portion of the electrically conductive wall; wherein the electrically isolated portion is configured to form an electrical connection through the electrically conductive wall. - View Dependent Claims (18, 19, 20)
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Specification