Alumina insulation for coating implantable components and other

Details Alumina insulation for coating implantable components and other Alumina insulation for coating implantable components and other

1997-12-19

2000-03-28

Kincaid, Kristine

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

174 523, 29840, 428336, H05K 103

Patent

active

060434376

ABSTRACT:
A protective, biocompatible coating or encapsulation material protects and insulates a component or device intended to be implanted in living tissue. The coating or encapsulation material includes a thin layer or layers of alumina, zirconia, or other ceramic, less than 25 microns thick, e.g., 5-10 microns thick. The alumina layer(s) may be applied at relatively low temperature. Once applied, the layer provides excellent hermeticity, and prevents electrical leakage. Even though very thin, the alumina layer retains excellent insulating characteristics. In one embodiment, an alumina layer less than about 6 microns thick provides an insulative coating that exhibits less than 10 pA of leakage current over an area 75 mils by 25 mils while soaking in a saline solution at temperatures up to 80.degree. C. over a three month period.

REFERENCES:
patent: 5562730 (1996-10-01), Davidson
patent: 5564434 (1996-10-01), Halperin et al.
patent: 5685306 (1997-11-01), Davidson
patent: 5750926 (1998-05-01), Schulman et al.

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