Patent US3716759A successfully refreshed from Google Patents.
US3716759A
Expired / Lapsed
US
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Electronic device with thermally conductive dielectric barrier
Assignee: General Electric Co
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Filing: 1970-10-12
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Granted: 1973-02-13
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Expires: 1990-10-12
Abstract
Abstract An electronic device is provided with an active portion which generates heat as a result of internal power losses, such as a semiconductor element, a resistor, a capacitor, etc. The active portion is mounted in thermally conductive relation with a substrate comprised of a unitary layer consisting essentially of aluminum nitride. The aluminum nitride may be in the form of a single crystal or may be polycrystalline.
Inventors
- 👤 R Scace
- 👤 G Slack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:05
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/10; H10W74/111; H10W74/114; H10W70/00; H10W70/40; H10W70/481
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
71 words
An electronic device capable of conditioning electrical energy supplied thereto and efficiently dissipating internally generated heat comprising electrical energy conditioning means comprised of a resistor capable of internally generating heat in use and a substrate lying in low thermal impedance engagement with said conditioning means comprised of a thermally conductive dielectric barrier consisting essentially of aluminum nitride having a density greater than about 80 percent the theoretical density of aluminum nitride.
Claim 2
Dependent Claim
71 words
An electronic device capable of conditioning electrical energy supplied thereto and efficiently dissipating internally generated heat comprising electrical energy conditioning means comprised of a resistor capable of internally generating heat in use and a substrate lying in low thermal impedance engagement with said conditioning means comprised of a thermally conductive dielectric barrier consisting essentially of aluminum nitride having a density greater than about 80 percent the theoretical density of aluminum nitride.
Claim 3
Dependent Claim
97 words
An electronic device capable of conditioning electrical energy supplied thereto and efficiently dissipating internally generated heat comprising an electrical energy conditioning means comprised of a resistor capable of internally generating heat in use and a substrate lying in low thermal impedance engagement with said conditioning means comprised of a thermally conductive dielectric barrier consisting essentially of aluminum nitride, said barrier having a density greater than about 80 percent the theoretical density of aluminum nitride, a room temperature conductivity greater than about 0.50 watt per centimeter degree Kelvin and an electrical resistivity greater than 1 X 1010 ohm-centimeters.
Claim 4
Dependent Claim
97 words
An electronic device capable of conditioning electrical energy supplied thereto and efficiently dissipating internally generated heat comprising an electrical energy conditioning means comprised of a resistor capable of internally generating heat in use and a substrate lying in low thermal impedance engagement with said conditioning means comprised of a thermally conductive dielectric barrier consisting essentially of aluminum nitride, said barrier having a density greater than about 80 percent the theoretical density of aluminum nitride, a room temperature conductivity greater than about 0.50 watt per centimeter degree Kelvin and an electrical resistivity greater than 1 X 1010 ohm-centimeters.
Claim 5
Dependent Claim
26 words
A device according to claim 2, wherein said body is composed of a plurality of particles consisting essentially of single phase aluminum nitride cohesively bonded together.
Claim 6
Dependent Claim
17 words
A device according to claim 3, wherein said particles are at least 95 percent pure aluminum nitride.
Claim 7
Dependent Claim
58 words
A device according to claim 2, wherein said body is composed of a plurality of particles consisting essentially of single phase aluminum nitride of at least 95 percent purity cohesively bonded together, said body having a density at least 95 percent theoretical, and having a room temperature thermal conductivity of at least 0.60 watt per centimeter degree Kelvin.
Claim 8
Dependent Claim
30 words
A device according to claim 2, wherein said body consists essentially of monocrystalline aluminum nitride having a room temperature thermal conductivity of At least 1.2 watts per centimeter degree Kelvin.
Claim 9
Dependent Claim
71 words
An electronic device capable of conditioning electrical energy supplied thereto and efficiently dissipating internally generated heat comprising electrical energy conditioning means comprised of a capacitor capable of internally generating heat in use and a substrate lying in low thermal impedance engagement with said conditioning means comprised of a thermally conductive dielectric barrier consisting essentially of aluminum nitride having a density greater than about 80 percent the theoretical density of aluminum nitride.
Claim 10
Dependent Claim
71 words
An electronic device capable of conditioning electrical energy supplied thereto and efficiently dissipating internally generated heat comprising electrical energy conditioning means comprised of a capacitor capable of internally generating heat in use and a substrate lying in low thermal impedance engagement with said conditioning means comprised of a thermally conductive dielectric barrier consisting essentially of aluminum nitride having a density greater than about 80 percent the theoretical density of aluminum nitride.
Claim 11
Dependent Claim
98 words
An electronic device capable of conditioning electrical energy supplied thereto and efficiently dissipating internally generated heat comprising an electrical energy conditioning means comprised of a capacitor capable of internally generating heat in use and a substrate lying in low thermal impedance engagement with said conditioning means comprised of a thermally conductive dielectric barrier consisting essentially of aluminum nitride, said barrier having a density greater than about 80 percent the theoretical density of aluminum nitride, a room temperature thermal conductivity greater than about 0.50 watt per centimeter degree Kelvin and an electrical resistivity greater than 1 X 1010 ohm-centimeters.
Claim 12
Dependent Claim
98 words
An electronic device capable of conditioning electrical energy supplied thereto and efficiently dissipating internally generated heat comprising an electrical energy conditioning means comprised of a capacitor capable of internally generating heat in use and a substrate lying in low thermal impedance engagement with said conditioning means comprised of a thermally conductive dielectric barrier consisting essentially of aluminum nitride, said barrier having a density greater than about 80 percent the theoretical density of aluminum nitride, a room temperature thermal conductivity greater than about 0.50 watt per centimeter degree Kelvin and an electrical resistivity greater than 1 X 1010 ohm-centimeters.
Claim 13
Dependent Claim
26 words
A device according to claim 8, wherein said body is composed of a body of particles consisting essentially of single phase aluminum nitride cohesively bonded together.
Claim 14
Dependent Claim
17 words
A device according to claim 9, wherein said particles are at least 95 percent pure aluminum nitride.
Claim 15
Dependent Claim
58 words
A device according to claim 8, wherein said body is composed of a plurality of particles consisting essentially of single phase aluminum nitride of at least 95 percent purity cohesively bonded together, said body having a density at least 95 percent theoretical, and having a room temperature thermal conductivity of at least 0.60 watt per centimeter degree Kelvin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |