US2829993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making fused junction semiconductor devices with alkali metalgallium alloy
Assignee: Raytheon Co
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Filing: 1955-06-24
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Granted: 1958-04-08
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Expires: 1975-06-24
Abstract
No abstract record available.
Inventors
- 👤 Jon H Myer
- 👤 Warren P Waters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:07
CPC Classifications
C; C30; C30B; C30B31/00; C30B31/04; H; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
THE METHOD OF FUSING A METAL ALLOY PELLET TO A REGION OF AN ACTIVE IMPURITY-DOPED SEMICONDUCTOR STARTING CRYSTAL, SAID METHOD INCLUDING THE STEPS OF: PLACING AN ALLOY PELLET INCLUDING AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, CESIUM AND RUBIDIUM AND GALLIUM IN CONTACT WITH A REGION OF THE CRYSTAL, HEATING THE CRYSTAL AND THE PELLET TO A TEMPERATURE ABOVE THE MELTING POINT OF THE PELLET, BUT BELOW THE MELTING POINT OF THE CRYSTAL, THEREBY TO MELT THE ALLOY AND DISSOLVE THEREIN AND ADJACENT REGION OF THE CRYSTAL, AND COOLING THE PELLET AND THE CRYSTAL AT LEAST A PORTION OF THE DISSOLVED REGROW ONTO THE CRYSTAL AT LEAST A PORTION OF THE DISSOLVED CRYSTAL TOGETHER WITH ATOMS OF GALLIUM FROM THE PELLET AND TO SOLIDIFY THE REMAINDER OF THE PELLET AS AN ALLOY BUTTON ADJACENT TO AND IN CONTACT WITH THE REGROWN REGION.
Claim 2
Independent Claim
146 words
THE METHOD OF FUSING A METAL ALLOY PELLET TO A REGION OF AN ACTIVE IMPURITY-DOPED SEMICONDUCTOR STARTING CRYSTAL, SAID METHOD INCLUDING THE STEPS OF: PLACING AN ALLOY PELLET INCLUDING AN ALKALI METAL SELECTED FROM THE GROUP CONSISTING OF SODIUM, POTASSIUM, CESIUM AND RUBIDIUM AND GALLIUM IN CONTACT WITH A REGION OF THE CRYSTAL, HEATING THE CRYSTAL AND THE PELLET TO A TEMPERATURE ABOVE THE MELTING POINT OF THE PELLET, BUT BELOW THE MELTING POINT OF THE CRYSTAL, THEREBY TO MELT THE ALLOY AND DISSOLVE THEREIN AND ADJACENT REGION OF THE CRYSTAL, AND COOLING THE PELLET AND THE CRYSTAL AT LEAST A PORTION OF THE DISSOLVED REGROW ONTO THE CRYSTAL AT LEAST A PORTION OF THE DISSOLVED CRYSTAL TOGETHER WITH ATOMS OF GALLIUM FROM THE PELLET AND TO SOLIDIFY THE REMAINDER OF THE PELLET AS AN ALLOY BUTTON ADJACENT TO AND IN CONTACT WITH THE REGROWN REGION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |