Patent ID: 6720493
Filing Date: 2004-04-13
Classification: H01L

Abstract:
A radiation shielding circuit device comprising:an ionizing radiation shielding top; a base; an electronic circuit device coupled to the base; a side wall coupled to the ionizing radiation shielding top and to the base; an ionizing radiation shield coupled to the base opposite the electronic circuit device from the ionizing shielding top; and a plurality of conductors electrically coupling the electronic circuit device to a plurality of leads; wherein the ionizing radiation shielding top and the ionizing radiation shield together shield the electronic circuit device from ionizing radiation, wherein the radiation shielding top and the ionizing radiation shield each comprises a high Z material and a low Z material; wherein the thicknesses of the radiation shielding top and the ionizing radiation shield are such that the electronic circuit device receives an amount of ionizing radiation less than a total dose tolerance for the electronic circuit device; and wherein said low Z material comprises at least one of aluminum, silicon and copper.