Direct integration of feedthrough to implantable medical device housing by sintering
First Claim
1. A method of attaching a feedthrough to a titanium housing of an implantable medical device, the method comprising:
- applying a sinter paste onto a surface of the housing about a perimeter of an opening through the housing, the sinter paste including a biocompatible bonding material;
placing an insulator of the feedthrough onto the sinter paste so as to cover the opening;
heating the sinter paste to a temperature less than a beta-transus temperature the titanium of the housing and to a temperature less than a melting point of the biocompatible bonding material for a desired duration to form, from the sinter paste, a sinter joint which bonds the feedthrough directly to the housing, without using a ferrule and without brazing or welding, thereby hermetically sealing the opening, wherein the heating is carried out in an oven having a non-oxygen and non-vacuum environment; and
metallizing portions of surfaces of the insulator contacting the sinter paste and resulting sinter joint.
4 Assignments
0 Petitions
Accused Products
Abstract
One aspect provides a method of attaching a feedthrough to a titanium housing of an implantable medical device. The method includes applying a sinter paste onto a surface of the housing about a perimeter of an opening through the housing, the sinter paste including a biocompatible bonding material, and placing an insulator of the feedthrough onto the sinter paste so as to cover the opening. The sinter paste is then heated to a temperature less than a beta-transus temperature the titanium of the housing and to a temperature less than a melting point of the biocompatible bonding material for a desired duration to form, from the sinter paste, a sinter joint which bonds the feedthrough to the housing and hermetically seals the opening.
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Citations
15 Claims
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1. A method of attaching a feedthrough to a titanium housing of an implantable medical device, the method comprising:
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applying a sinter paste onto a surface of the housing about a perimeter of an opening through the housing, the sinter paste including a biocompatible bonding material; placing an insulator of the feedthrough onto the sinter paste so as to cover the opening; heating the sinter paste to a temperature less than a beta-transus temperature the titanium of the housing and to a temperature less than a melting point of the biocompatible bonding material for a desired duration to form, from the sinter paste, a sinter joint which bonds the feedthrough directly to the housing, without using a ferrule and without brazing or welding, thereby hermetically sealing the opening, wherein the heating is carried out in an oven having a non-oxygen and non-vacuum environment; and metallizing portions of surfaces of the insulator contacting the sinter paste and resulting sinter joint. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of attaching a feedthrough device to hermetically seal an opening in a titanium housing of an implantable medical device, the method comprising:
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applying a sinter paste about a perimeter of the opening, the sinter paste including a biocompatible bonding material; positioning the feedthrough on the sinter paste to cover the opening, the feedthrough having a width greater than a width of the opening; heating the sinter paste to a temperature less than a β
-transus temperature of the titanium of the housing and less than a melting point of the biocompatible bonding material to form a sinter joint from the sinter paste that bonds the feedthrough directly to the housing, without using a ferrule and without brazing or welding, thereby hermetically sealing the opening, wherein the heating is carried out in an oven having a non-oxygen and non-vacuum environment; andmetallizing portions of surfaces of the insulator contacting the sinter paste and resulting sinter joint. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification