Patent ID: 9006955
Filing Date: 2015-04-14
Classification: G21H,H01L,H01M,Y02E

Abstract:
1. A power converter comprising: a nuclear radiation emitter having a first side and a second side, wherein the nuclear radiation emitter comprises a radiation-emitting radioisotope; a plurality of semiconductor substrates disposed over the first side of the nuclear radiation emitter, wherein each of the plurality of semiconductor substrates comprises a junction for converting nuclear radiation particles to electrical energy; at least one high-density layer, wherein the at least one high density layer has a density that is higher than a density of the plurality of semiconductor substrates, wherein the at least one high-density layer is disposed between two of the plurality of semiconductor substrates; and a moderating layer disposed between the nuclear radiation emitter and the plurality of semiconductor substrates, wherein a composition of the moderating layer is such that the moderating layer acts to truncate nuclear radiation particles emitted from the nuclear radiation emitter having an energy above a predetermined threshold, wherein the predetermined threshold of the moderating layer is about 0.5 MeV.