초록 ▼

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 comprises a thin layer or layers of alumina, zerconia, or other ceramic, less than 25 microns thick, e.g., 5-10

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 comprises a thin layer or layers of alumina, zerconia, 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 area while soaking in a saline solution at temperatures up to 80.degree. C. over a three month period.

대표청구항 ▼

1. A method of placing a sealed, protective and insulative coating on an object to be submersed in a conductive medium, said method comprising:(a) depositing a layer of titanium on a surface of the object that is about 300 .ANG. thick; and (b) depositing a layer of alumina, zirconia, magnesium oxide

1. A method of placing a sealed, protective and insulative coating on an object to be submersed in a conductive medium, said method comprising:(a) depositing a layer of titanium on a surface of the object that is about 300 .ANG. thick; and (b) depositing a layer of alumina, zirconia, magnesium oxide, alloys of alumina, zirconia or magnesium oxide over the surface of the object that is about 5-10 microns thick.