US 12,246,183 B1
Self-centering polymeric washer that prevents misalignment when positioned between a feedthrough and a circuit board supporting EMI filter capacitors for a medical device
Jason Woods, Carson City, NV (US); Robert A. Stevenson, Canyon Country, CA (US); Christine A. Frysz, Orchard Park, NY (US); Thomas Marzano, East Amherst, NY (US); and Keith W. Seitz, Clarence Center, NY (US)
Assigned to Greatbatch Ltd., Clarence, NY (US)
Filed by Greatbatch Ltd., Clarence, NY (US)
Filed on Apr. 10, 2024, as Appl. No. 18/631,709.
Application 18/631,709 is a continuation in part of application No. 18/377,609, filed on Oct. 6, 2023, granted, now 11,980,766.
This patent is subject to a terminal disclaimer.
Int. Cl. A61N 1/375 (2006.01); F16B 43/00 (2006.01); H01G 4/35 (2006.01); H01R 13/52 (2006.01); H01R 13/533 (2006.01); H05K 1/02 (2006.01)
CPC A61N 1/3754 (2013.01) [F16B 43/001 (2013.01); H01G 4/35 (2013.01); H01R 13/521 (2013.01); H01R 13/533 (2013.01); H05K 1/0218 (2013.01); H05K 2201/10015 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An assembly that is attachable to an active medical device (AMD), the assembly comprising:
a) a feedthrough, comprising:
i) an electrically conductive ferrule comprising a ferrule sidewall defining a ferrule opening extending to a ferrule body fluid side spaced from a ferrule device side;
ii) an insulator hermetically sealed to the ferrule in the ferrule opening by a gold braze, the insulator extending to an insulator body fluid side spaced from an insulator device side, wherein, when the ferrule hermetically sealed to the insulator is attached to an opening in a housing of an AMD, the ferrule body fluid side adjacent to the insulator body fluid side, and the ferrule device side adjacent to the insulator device side reside outside and inside the AMD, respectively; and
iii) a first terminal pin hermetically sealed to the insulator in a first via hole by a first terminal pin braze, and a second terminal pin hermetically sealed to the insulator in a second via hole by a second terminal pin braze, wherein the first and second terminal pins extend outwardly beyond the insulator device side; and
b) a circuit board comprising spaced apart circuit board first and second sides, the circuit board supporting at least one circuit board ground plate, wherein the circuit board comprises circuit board first and second active via holes conductively isolated from the circuit board ground plate, and wherein the circuit board further comprises circuit board first and second ground via holes and either a circuit board third ground via hole or a circuit board ground termination conductively connected to the circuit board ground plate;
c) a polymeric washer positioned between the circuit board first side and the insulator second end surface, the polymeric washer comprising at least a washer first opening and a washer second opening with the first and second terminal pins extending through the respective washer first and second openings and into the circuit board first and second active via holes;
d) at least a first filter capacitor and a second filter capacitor proximate the circuit board second side, the first filter capacitor comprising first filter capacitor active and ground terminations, and the second filter capacitor comprising second filter capacitor active and ground terminations, wherein the first and second filter capacitor active terminations are electrically connected to the respective first and second terminal pins extending into the circuit board first and second active via holes, and wherein the first and second filter capacitor ground terminations are electrically connected to the at least one circuit board ground plate through the respective circuit board first and second ground via holes; and
e) an electrical connection material connecting either the circuit board third ground via hole or the circuit board edge termination to a system ground.