Invention Grant
- Patent Title: Low equivalent series resistance RF filter for an AIMD
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Application No.: US15704657Application Date: 2017-09-14
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Publication No.: US10092749B2Publication Date: 2018-10-09
- Inventor: Robert A. Stevenson , Robert Shawn Johnson , Warren S. Dabney , Thomas Marzano , Richard L. Brendel , Christopher Michael Williams , Holly Noelle Moschiano , Keith W. Seitz , John E. Roberts
- 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; Marc G. Martino
- Main IPC: A61N1/08
- IPC: A61N1/08 ; A61N1/37 ; H01G4/30 ; H01G4/32 ; A61N1/375 ; H01G4/005 ; H03H1/00 ; H01G4/12 ; H01G4/35

Abstract:
An AIMD includes a conductive housing, an electrically conductive ferrule with an insulator hermetically sealing the ferrule opening. A conductive pathway is hermetically sealed and disposed through the insulator. A filter capacitor is disposed on a circuit board within the housing and has a dielectric body supporting at least two active and two ground electrode plates interleaved, wherein the at least two active electrode plates are electrically connected to the conductive pathway on the device side, and the at least two ground electrode plates are electrically coupled to either the ferrule and/or the conductive housing. The dielectric body has a dielectric constant less than 1000 and a capacitance of between 10 and 20,000 picofarads. The filter capacitor is configured for EMI filtering of MRI high RF pulsed power by a low ESR, wherein the ESR of the filter capacitor at an MRI RF pulsed frequency or range of frequencies is less than 2.0 ohms.
Public/Granted literature
- US20180008822A1 LOW EQUIVALENT SERIES RESISTANCE RF FILTER FOR AN AIMD Public/Granted day:2018-01-11
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