An implantable device, comprising: an electrically non-conductive substrate； a plurality of electrically conductive feedthroughs through said electrically non-conductive substrate； an electrical circuit attached to said electrically non-conductive substrate and electrically connected to a said plurality of electrically conductive feedthroughs； and a cover bonded to said electrically non-conductive substrate, said cover, said electrically non-conductive substrate and said electrically conductive feedthroughs forming a hermetic package.
