US4518944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature stabilizer
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1983-10-18
•
Granted: 1985-05-21
•
Expires: 2003-10-18
Abstract
Abstract A device for regulating the temperature of an electronic component, such as a surface acoustic wave (SAW) component in a hybrid package, without dissipating large amounts of power. The device includes a positive-temperature-coefficient thermistor positioned in contact with the component of which the temperature is to be controlled, and an insulating body with included air spaces, positioned between the thermistor and the package, to provide a high thermal resistance between the thermistor and the package. In one preferred form of the invention, the insulating body is a length of glass tubing that has been deformed to include two flat surfaces for contacting the thermistor and the package. Another disclosed embodiment includes a second thermistor and insulator combination, to further increase the thermal resistance between the component and the package.
Inventors
- 👤 Alan E. Faris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:43
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
109 words
A temperature-stabilizing device for regulating the operating temperature of an electronic component that is to be mounted on a package, said device comprising: a positive-temperature-coefficient thermistor mounted in thermal contact with the electronic component whose temperature is to be regulated; and an insulating body mounted between said thermistor and the package, said insulating body including a length of tubing that has been deformed to provide two flat surfaces for contact with said thermistor and with the package, respectively, whereby the interior volume of said tubing increases the thermal resistance of the path between said thermistor and the package; said tubing being of a material that produces no contaminant gases.
Claim 2
Dependent Claim
109 words
A temperature-stabilizing device for regulating the operating temperature of an electronic component that is to be mounted on a package, said device comprising: a positive-temperature-coefficient thermistor mounted in thermal contact with the electronic component whose temperature is to be regulated; and an insulating body mounted between said thermistor and the package, said insulating body including a length of tubing that has been deformed to provide two flat surfaces for contact with said thermistor and with the package, respectively, whereby the interior volume of said tubing increases the thermal resistance of the path between said thermistor and the package; said tubing being of a material that produces no contaminant gases.
Claim 3
Dependent Claim
15 words
A temperature-stabilizing device as set forth in claim 1, wherein: said tubing is of glass.
Claim 4
Dependent Claim
38 words
A temperature-stabilizing device as set forth in claim 1, wherein: said insulating body is of a material having the properties of low thermal conductivity on the order of less than 0.1 watt/cm-degree C. and low outgassing in vacuum.
Claim 5
Dependent Claim
137 words
A temperature-stabilizing device for regulating the operating temperature of an electronic component that is to be mounted on a package, said device comprising: a positive-temperature-coefficient thermistor mounted in thermal contact with the electronic component whose temperature is to be regulated; an insulating body mounted between said thermistor and the package, said insulating body being of a material that produces no contaminant gases, and having included air spaces to increase the thermal resistance of the path between said thermistor and the package; a second positive-temperature-coefficient thermistor; and a second insulating body; said second thermistor being positioned in contact with the first insulating body, and said second insulating body being positioned between said second thermistor and the package, to provide a second thermistor and insulator combination that is thermally in series connection with the first thermistor and insulator combination.
Claim 6
Dependent Claim
137 words
A temperature-stabilizing device for regulating the operating temperature of an electronic component that is to be mounted on a package, said device comprising: a positive-temperature-coefficient thermistor mounted in thermal contact with the electronic component whose temperature is to be regulated; an insulating body mounted between said thermistor and the package, said insulating body being of a material that produces no contaminant gases, and having included air spaces to increase the thermal resistance of the path between said thermistor and the package; a second positive-temperature-coefficient thermistor; and a second insulating body; said second thermistor being positioned in contact with the first insulating body, and said second insulating body being positioned between said second thermistor and the package, to provide a second thermistor and insulator combination that is thermally in series connection with the first thermistor and insulator combination.
Claim 7
Dependent Claim
46 words
A temperature-stabilizing device as set forth in claim 4, wherein: said first and second insulating bodies each include a length of tubing that has been deformed to provide two flat contact surfaces; and the included air space is provided by the interior volume of the tubing.
Claim 8
Dependent Claim
17 words
A temperature-stabilizing device as set forth in claim 5, wherein: said lengths of tubing are of glass.
Claim 9
Dependent Claim
38 words
A temperature-stabilizing device as set forth in claim 4, wherein: said insulating bodies are of a material having the properties of low thermal conductivity on the order of less than 0.01 watt/cm-degree C. and low outgassing in vacuum.
References Cited (Backward Citations)
US2396196A
Cited
US3007023A
Cited
US2967924A
Cited
US3028473A
Cited
US3444399A
Cited
US3393448A
Cited
US3381253A
Cited
US3749879A
Cited
US4259606A
Cited
US4334168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |