Flat-through capacitor mounted in a tombstone position on a hermetic feedthrough for an active implantable medical device

A filtered feedthrough for an active implantable medical device (AIMD), the filtered feedthrough comprising:

• a) an electrically conductive ferrule configured to hermetically seal an opening of a housing of the AIMD, the ferrule comprising a ferrule body fluid side opposite a ferrule device side, wherein, when the ferrule is attached to the opening in the housing of the AIMD, the ferrule body fluid side and the ferrule device side reside outside and inside the AIMD housing, respectively;
• b) an electrically non-conductive insulator hermetically sealing a ferrule opening, the insulator configured to separate the body fluid side from the device side;
• c) at least one lead wire hermetically sealed to and disposed through the insulator, the at least one lead wire in electrical non-conductive relation with the ferrule;
• d) a three-terminal flat-through EMI/energy dissipating filter disposed on the ferrule device side, the filter comprising an electrically insulative substrate material supporting at least one active electrode plate interleaved in a capacitive relationship with at least one ground electrode plate,
• e) wherein the at least one active electrode plate is electrically connected to the at least one lead wire, and
• f) wherein the at least one ground electrode plate is electrically connected to the ferrule, and
• g) wherein the filter is disposed in a tombstone mounted position relative to the insulator.