US3775218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of semiconductor thermoelements
Assignee: Atomic Energy of Canada Ltd AECL
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Filing: 1971-03-04
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Granted: 1973-11-27
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Expires: 1991-03-04
Abstract
Abstract There is disclosed a method of preparing miniature semiconductor thermoelements suitable for use in power generators operable with low temperature heat such may be conveniently obtained from radioisotopes. The invention utilizes the compacting of piles of semiconductor thermoelements in a co-extensive arrangement wherein the respective polarities of the elements may be in series, parallel or series-parallel connection. The ends of the elements are connected by a matrix of electrically conductive regions formed on a high heat transferring electrically insulating material.
Inventors
- 👤 G Hare
- 👤 N Thompson
- 👤 M Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:42
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/01; H10N10/80; H10N10/85; H10N10/851; H10N10/852; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1075; Y10T428/00; Y10T428/31504; Y10T428/31721
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
190 words
A method of accurately assembling a bonded matrix of layers of coextensively disposed electrically conductive limbs to give precise final dimensions and limited voidage, said method comprising the steps: i. cutting strips of cured polyimide film to the same length as said limbs, some of said strips having widths equal to a single layer of said limbs and some of said strips having width equal to the thickness of said limbs, ii. individually coating the limbs in an uncured polyimide and placing each such coated limb in succession in rows and layers both separated by said strips of cured polyimide film, iii. slowly compressing all said limbs together after assembly to a precisely controlled size to expel excess uncured polyimide and maintaining compression, iv. wiping off excess uncured polyimide, v. baking the assembled limbs at a temperature between 60* and 100* C for at least 20 hours, vi. baking the assembled limbs at about 100* C for at least 1 hour, vii. baking the assembled limbs at about 150* C for at least 1 hour, viii. removing compression, and ix. baking at about 350* C for at least 1 hour.
References Cited (Backward Citations)
GB724379A
Cited
US3102213A
Cited
FR1268629A
Cited
US3293083A
Cited
FR1357052A
Cited
US3319317A
Cited
US3486223A
Cited
US3553043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |