Patent ID: 7837743
Filing Date: 2010-11-23
Classification: H01G

Abstract:
1. A method for fabricating a tantalum anode for a high voltage capacitor for an implantable medical device, the method comprising: sintering a slug of pressed tantalum powder; anodizing the sintered slug to form the anode; heat treating the anode in an uncontrolled air atmosphere at a temperature between approximately 400° C. and approximately 460° C. for a time between approximately 45 minutes and approximately 65 minutes; and anodizing the heat treated anode to reform the anode by immersing the sintered slug in an electrolyte at a temperature between approximately 15° C. and approximately 30° C.; and applying a voltage across the immersed sintered slug, the voltage being between approximately 175 Volts and approximately 375 Volts.