US2842841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of soldering leads to semiconductor devices
Assignee: Lanteris Space LLC
•
Filing: 1955-06-13
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Granted: 1958-07-15
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Expires: 1975-06-13
Abstract
No abstract record available.
Inventors
- 👤 George L Schnable
- 👤 Roschen John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:27
CPC Classifications
H; H10; H10W; H10W99/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49169
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A METHOD OF FABRICATING A SEMICONDUCTOR DEVICE OF THE TYPE INCLUDING AN INDIUM ELECTRODE FORMED ON A SURFACE PORTION OF A BODY OF GERMANIUM, THE STEPS WHICH COMPRISE: FORMING A BEAD OF CONGEALED INDIUM-CADMIUM ALLOY SOLDER ON AN END OF A THIN WIRE, THE SOLDER OF SAID BEAD HAVING A MELTING TEMPERATURE BELOW THAT OF SAID ELECTRODE; AND DIPPING THE BEAD, WHILE IN CONTACT WITH THE ELECTRODE, IN A LIQUID FLUXING MEDIUM COMPRISING PROPYLENE GLYCOL CONTAINING, IN SOLUTION, A FLUX WHICH IS NON-DELETERIOUS TO AID SEMI-CONDUCTOR DEVICE, WHILE MAINTAINING THE TEMPERATURE OF THE FLUXING MEDIUM AT A TEMPERATURE BETWEEN THE MELTING TEMPERTURES OF INDIUM AND OF THE INDIUM-CADMIUM ALLOY.
Claim 2
Dependent Claim
110 words
IN A METHOD OF FABRICATING A SEMICONDUCTOR DEVICE OF THE TYPE INCLUDING AN INDIUM ELECTRODE FORMED ON A SURFACE PORTION OF A BODY OF GERMANIUM, THE STEPS WHICH COMPRISE: FORMING A BEAD OF CONGEALED INDIUM-CADMIUM ALLOY SOLDER ON AN END OF A THIN WIRE, THE SOLDER OF SAID BEAD HAVING A MELTING TEMPERATURE BELOW THAT OF SAID ELECTRODE; AND DIPPING THE BEAD, WHILE IN CONTACT WITH THE ELECTRODE, IN A LIQUID FLUXING MEDIUM COMPRISING PROPYLENE GLYCOL CONTAINING, IN SOLUTION, A FLUX WHICH IS NON-DELETERIOUS TO AID SEMI-CONDUCTOR DEVICE, WHILE MAINTAINING THE TEMPERATURE OF THE FLUXING MEDIUM AT A TEMPERATURE BETWEEN THE MELTING TEMPERTURES OF INDIUM AND OF THE INDIUM-CADMIUM ALLOY.
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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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |