Invention Grant
- Patent Title: Ground electrical path from an MLCC filter capacitor on an AIMD circuit board to the ferrule of a hermetic feedthrough
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Application No.: US17505062Application Date: 2021-10-19
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Publication No.: US11648409B2Publication Date: 2023-05-16
- Inventor: Robert A. Stevenson , Christine A. Frysz , Richard L. Brendel
- Applicant: Greatbatch Ltd.
- Applicant Address: US NY Clarence
- Assignee: Greatbatch Ltd.
- Current Assignee: Greatbatch Ltd.
- Current Assignee Address: US NY Clarence
- Agent Michael F. Scalise
- The original application number of the division: US13873832 2013.04.30
- Main IPC: A61N1/375
- IPC: A61N1/375 ; A61N1/08 ; H01G4/35 ; A61N1/37 ; H05K9/00 ; H03H1/00 ; H05K5/00 ; H01R13/7195 ; H03H7/01 ; H01G4/06 ; H01G4/40 ; H05K1/18

Abstract:
An EMI/energy dissipating filter for an active implantable medical device (AIMD) comprises a first gold braze sealing an insulator to the ferrule of a glass-to-metal seal (GTMS) and a lead wire that is sealed in a passageway through the insulator by a second gold braze. A circuit board is disposed adjacent to the insulator. A two-terminal chip capacitor disposed adjacent to the circuit board has an active end metallization connected to its active electrode plates and a ground end metallization connected to its ground electrode plates. A ground electrical path extends from the ground end metallization of the chip capacitor, through a circuit board ground plate disposed on or within the circuit board, and to the ferrule. An active electrical path extends from the active end metallization of the chip capacitor to the lead wire of the GTMS.
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