Patent US3152373A successfully refreshed from Google Patents.
US3152373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing semiconductor devices
Assignee: US Philips Corp
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Filing: 1961-11-14
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Granted: 1964-10-13
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Expires: 1981-11-14
Abstract
No abstract record available.
Inventors
- 👤 Einthoven Willem Gerard
- 👤 Manintveld Jan Adrianus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:26
CPC Classifications
H; H10; H10P; H10P95/00; H10P95/50; C; C22; C22C; C22C11/00; H10D; H10D62/00; H10D62/80; H10D62/83; H10D62/834
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
IN A METHOD OF MANUFACTURING A SEMICONDUCTOR DEVICE IN WHICH A SEMICONDUCTIVE BODY AND A MASS OF ELECTRODE MATERIAL WHILE SEPARATED FROM EACH OTHER ARE HEATED AT A TEMPERATURE SUFFICIENT TO MELT THE ELECTRODE MASS BUT INSUFFICIENT TO MELT THE BODY, AFTER WHICH THE ELECTRODE MELT IS CAST ONTO THE BODY TO ALLOY WITH A SURFACE REGION THEREOF, AND AFTER WHICH THE ASSEMBLY IS COOLED TO FREEZE THE MASS AND FORM AN ALLOYED ELECTRODE ON THE BODY, THE IMPROVEMENT COMPRISING CONSTITUTING THE MASS PRIOR TO ITS BEING CAST OF AT LEAST 25% BY WEIGHT OF AT LEAST ONE ELEMENT HAVING A HIGH SPECIFIC WEIGHT WHOSE VAPOR PRESSURE AT A GIVEN TEMPERATURE IS AT LEASTSUBSTANTIALLY EQUAL TO THAT OF LEAD AT THE SAME GIVEN TEMPERATURE, AND AFTER THE ELECTRODE HAS BEEN CAST ONTO THE SEMICONDUCTIVE BODY, HEATING THE ELCTRODE AT A TEMPERATURE AND FOR A PERIOD OF TIME SUFFICIENT TO REMOVE FROM THE MASS BY VAPORIZATION AT LEAST 25% BY WEIGHT OF THE CAST MATERIAL, WHEREBY THE INITIALLY HEAVIER CAST ELECTRODE IMPROVES THE ALLOYING TO THE BODY AND THE LIGHTER ELECTRODE RESULTING FROM THE VAPORIZATION STEP LESSENS THE RISK OF DAMAGEDURING COOLING.
Claim 2
Dependent Claim
191 words
IN A METHOD OF MANUFACTURING A SEMICONDUCTOR DEVICE IN WHICH A SEMICONDUCTIVE BODY AND A MASS OF ELECTRODE MATERIAL WHILE SEPARATED FROM EACH OTHER ARE HEATED AT A TEMPERATURE SUFFICIENT TO MELT THE ELECTRODE MASS BUT INSUFFICIENT TO MELT THE BODY, AFTER WHICH THE ELECTRODE MELT IS CAST ONTO THE BODY TO ALLOY WITH A SURFACE REGION THEREOF, AND AFTER WHICH THE ASSEMBLY IS COOLED TO FREEZE THE MASS AND FORM AN ALLOYED ELECTRODE ON THE BODY, THE IMPROVEMENT COMPRISING CONSTITUTING THE MASS PRIOR TO ITS BEING CAST OF AT LEAST 25% BY WEIGHT OF AT LEAST ONE ELEMENT HAVING A HIGH SPECIFIC WEIGHT WHOSE VAPOR PRESSURE AT A GIVEN TEMPERATURE IS AT LEASTSUBSTANTIALLY EQUAL TO THAT OF LEAD AT THE SAME GIVEN TEMPERATURE, AND AFTER THE ELECTRODE HAS BEEN CAST ONTO THE SEMICONDUCTIVE BODY, HEATING THE ELCTRODE AT A TEMPERATURE AND FOR A PERIOD OF TIME SUFFICIENT TO REMOVE FROM THE MASS BY VAPORIZATION AT LEAST 25% BY WEIGHT OF THE CAST MATERIAL, WHEREBY THE INITIALLY HEAVIER CAST ELECTRODE IMPROVES THE ALLOYING TO THE BODY AND THE LIGHTER ELECTRODE RESULTING FROM THE VAPORIZATION STEP LESSENS THE RISK OF DAMAGEDURING COOLING.
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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |