US Patent 10232185 Device implantable under skin

A device implantable under skin is disclosed. The device includes a sealed housing containing electronics for at least stimulation or collection of data and at least one antenna for communicating with an external device, a magnet configured to hold said external device in proximity to the sealed housing. the sealed housing includes an upper cover being closest to the skin when the device is implanted, and a lower cover that is hermetically connected to the upper cover. The lower cover includes an elevated region, a recessed region, and at least one feedthrough element formed in the recessed region of the lower cover.