摘要:
A method for making a seal between a sealing glass and titanium by forming a nitride layer on the titanium and then sealing the glass to the nitrided titanium. The formation of the nitride layer can be accomplished by the steps of placing the titanium in a substantially oxygen-free atmosphere comprising a major amount of an inert gas and a minor amount of nitrogen and heating the titanium in that atmosphere to a temperature of at least 300.degree. C. The method allows for the formation of the nitride layer and the glass seal in a single operation. The method works well in the manufacture of feedthroughs with conventional processing equipment.
摘要:
A body implanted device including a container having an opening through which extends an electrical feedthrough. The feedthrough includes a terminal of bio-stable material. A glass insulator is positioned around the terminal. The glass insulator is chosen from a CABAL-12 type composition or variation thereof. The terminal is comprised of a material which has thermal expansion characteristics compatible with the glass seal. For glass seals having a thermal expansion in the range of 6.8 to 8.0.times.10.sup.-6 in/in/.degree. C. the terminal is comprised of a thin layer of titanium metallurgically clad over niobium or tantalum. For glass seals having a thermal expansion in the range of 8.0 to 9.0.times.10.sup.-6 in/in/.degree. C. the terminal is comprised of platinum, platinum-iridium or alloys of either, or of pure titanium.
摘要翻译:一种体植入装置,包括具有开口的容器,所述开口延伸有电馈通孔。 馈通包括生物稳定材料的终端。 玻璃绝缘子位于端子周围。 玻璃绝缘体选自CABAL-12型组合物或其变体。 端子由具有与玻璃密封相容的热膨胀特性的材料构成。 对于热膨胀在6.8至8.0×10 -6 in / in /℃范围内的玻璃密封件,该端子由冶金地覆盖在铌或钽上的钛薄层构成。 对于热膨胀范围为8.0至9.0×10 -6 in / in /℃的玻璃密封件,该端子由铂,铂 - 铱或纯钛的合金组成。
摘要:
A centerless grinding method of finishing feedthrough pins and corresponding devices for use in implantable medical devices and for components such as batteries in implantable medical devices is disclosed. The method provides certain advantages, including the elimination of longitudinal anomalies in drawn wire to thereby improve the hermeticity of implantable medical devices. In one of the preferred methods, the surface of an over-size medical grade wire having a known anomaly depth is centerless ground using an abrasive wheel and suitable coolant to a layer past which those anomalies disappear.
摘要:
A hermetically sealed implantable medical device is provided with a multi-pin arrangement including selected glass to metal or ceramic to metal seals for a feedthrough of the compression seal or matched seal type.
摘要:
A hermetically sealed implantable medical device is provided with a multi-pin arrangement including selected glass to metal or ceramic to metal seals for a feedthrough of the compression seal or matched seal type.
摘要:
A hermetic, leak-proof, corrosion resistant electrical feedthrough especially for use with implantable pulse generators. The feedthrough includes a titanium or niobium ferrule, an alumina insulator with a niobium braze area thereon positioned within the ferrule and sealed to the ferrule by a braze of gold at the braze area, electrical lead wires of niobium, tantalum, tungsten, molybdenum or alloys thereof extending through corresponding openings in the insulator, and a body of fusible glass joining and sealing each lead wire to the insulator.
摘要:
An electrical interconnect structure for an implantable medical device includes a feedthrough that has a pin extending therefrom. The pin defines a first end and a middle portion. A bonding surface is formed at the first end of the pin, and the bonding surface has a surface area greater than a cross-sectional area of the pin at its middle portion.
摘要:
The present invention relates to centerless grinding methods and corresponding devices such as feedthroughs for implantable medical devices and for batteries for implantable medical devices. The present invention provides certain advantages, including the elimination of longitudinal anomalies in drawn wire and increasing the reliability of implantable medical devices. In a method of the present invention, the surface of an over-size medical grade wire having a known anomaly depth is centerless ground to a depth past which those anomalies disappear. Centerless grinding of the present invention may be accomplished using an abrasive wheel and suitable coolant.
摘要:
The present invention relates to centerless grinding methods and corresponding devices such as feedthroughs for implantable medical devices and for batteries for implantable medical devices. The present invention provides certain advantages, including the elimination of longitudinal anomalies in drawn wire and increasing the reliability of implantable medical devices. In a method of the present invention, the surface of an over-size medical grade wire having a known anomaly depth is centerless ground to a depth past which those anomalies disappear. Centerless grinding of the present invention may be accomplished using an abrasive wheel and suitable coolant.