Patent ID: 8532776

Claim:
A method of making a hermetic package of an implantable device, comprising the steps of: providing a substantially planar ceramic containing non-conductive substrate defining a plurality of vias having a substantially planar inside surface; filling said vias with a metal containing ceramic paste, the vias and ceramic containing non-conductive substrate forming a base; firing said base; applying thin film traces to the ceramic substrate which are suitable to survive braze temperatures; brazing a metallic ring to said substantially planar inside surface of said base; flip-chip bonding inside the metallic ring and directly to said base an integrated circuit, which is not suitable to withstand braze temperatures, locating the integrated circuit at a distance and spaced apart from the metallic ring thus defining a region between the integrated circuit and the metallic ring, electrically connecting said integrated circuit to at least one of said vias and leaving at least one of the vias of the region between the integrated circuit and the metallic ring free for further electrical connections; mounting a hybrid stack circuit on top of said integrated circuit; wire bonding said hybrid stack circuit directly to said base and limitedly to said region between the integrated circuit and the metallic ring; and welding a metallic top to said metallic ring forming the hermetic package, wherein said integrated circuit and said hybrid stack circuit are located within said hermetic package.