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US 6,720,493 B1Granted
Radiation shielding of integrated circuits and multi-chip modules in ceramic and metal packages
AssigneeSpace Electronics, Inc.
InventorsDavid J. Strobel, David R. Czajkowski
Life of this patent
Estimating the term…
Abstract
A radiation shielded and packaged integrated circuit semiconductor device includes a lid secured to a base to enclose an integrated circuit die within, wherein the lid and the base are each constructed from a high Z material to prevent radiation from penetrating therethrough. Another embodiment includes a die attach slug constructed from a high Z material disposed between the integrated circuit die and the base, in combination with a high Z material lid to substantially block incident radiation.
Claims20
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.
9 more elements
A radiation shielding circuit device comprising:
- an ionizing radiation shielding top;
- a base;
- an electronic circuit device coupled to the base;
- a ionizing radiation shielding bottom coupled to the base;
- a side wall coupled to the ionizing radiation shielding top and to the base;
- a plurality of leads;
- a plurality of conductors electrically coupling the electronic circuit device to the plurality of leads;
- wherein the ionizing radiation shielding top and the ionizing radiation shielding bottom shield the electronic circuit device from ionizing radiation and comprise a high Z material and a low Z material;
- wherein the shielding of the electronic circuit device comprises a thickness 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.
8 more elements
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 inner ionizing radiation shielding wall;
- 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, the inner ionizing radiation shielding wall, and the ionizing radiation shield together shield the electronic circuit device from ionizing radiation;
- wherein the ionizing radiation shielding top, the inner ionizing radiation shielding wall, and the ionizing radiation shield each comprises a high Z material and a low Z material;
- wherein the thicknesses of the ionizing radiation shielding top, the inner ionizing radiation shielding wall, 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 the ionizing radiation shield is juxtaposed against an outer surface of the base.
10 more elements
Dependencies are inferred from the claim text.