US2806807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making contacts to semiconductor bodies
Assignee: General Electric Co
•
Filing: 1955-08-23
•
Granted: 1957-09-17
•
Expires: 1975-08-23
Abstract
No abstract record available.
Inventors
- 👤 John A Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:47
CPC Classifications
H; H10; H10P; H10P95/00; H10P95/50; C; C22; C22F; C22F3/00; C30; C30B; C30B31/00; C30B31/04; H01; H01C; H01C7/00; H10P50/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE METHOD OF MAKING AN ELECTRICAL CONTACT TO THE SURFACE OF A MONOCRYSTALLINE SEMICONDUCTOR BODY, WHICH METHOD COMPRISES DEPOSITING A POOL OF AN ACID ETCHING SOLUTION UPON THE SURFACE, PLACING WITHIN THE POOL A QUANTITY OF CONTACT MATERIAL HAVING A MELTING POINT LOWER THAN 390*C., HEATING THE BODY TO A TEMPERATURE ABOVE THE MELTING POINT OF THE CONTAC MATERIAL AND BELOW 450*C. UNTIL THE ACID ETCHING SOLUTION ATTACKS THE SURFACE OF THE SEMICONDUCTOR BODY TO REMOVE ALL OXIDE COATING THEREFROM, AND MAINTAINING THE ELEVATTED TEMPERATURE UNTIL THE ETCHING SOLUTION DISAPPEARS, LEAVING THE CONTACT MATERIAL ALLOYED TO THE SURFACE OF THE SEMICONDUCTOR BODY.
Claim 2
Independent Claim
102 words
THE METHOD OF MAKING AN ELECTRICAL CONTACT TO THE SURFACE OF A MONOCRYSTALLINE SEMICONDUCTOR BODY, WHICH METHOD COMPRISES DEPOSITING A POOL OF AN ACID ETCHING SOLUTION UPON THE SURFACE, PLACING WITHIN THE POOL A QUANTITY OF CONTACT MATERIAL HAVING A MELTING POINT LOWER THAN 390*C., HEATING THE BODY TO A TEMPERATURE ABOVE THE MELTING POINT OF THE CONTAC MATERIAL AND BELOW 450*C. UNTIL THE ACID ETCHING SOLUTION ATTACKS THE SURFACE OF THE SEMICONDUCTOR BODY TO REMOVE ALL OXIDE COATING THEREFROM, AND MAINTAINING THE ELEVATTED TEMPERATURE UNTIL THE ETCHING SOLUTION DISAPPEARS, LEAVING THE CONTACT MATERIAL ALLOYED TO THE SURFACE OF THE SEMICONDUCTOR BODY.
References Cited (Backward Citations)
US1263656A
Cited
US2731704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |