US3179593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing monocrystalline semiconductor material
Assignee: Siemens Schuckertwerke AG
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Filing: 1960-09-28
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Granted: 1965-04-20
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Expires: 1980-09-28
Abstract
No abstract record available.
Inventors
- 👤 Reuschel Konrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:50
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/34; Y; Y10; Y10S; Y10S117/00; Y10S117/90; Y10S117/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A CRUCIBLE-FREE FLOATING MOLTEN ZONE METOD FOR PRODUCING A MONOCRYSTALLINE SEMICONDUCTOR ROD FROM A POLYCRYSTALLINE ROD, COMPRISING SUPPORTING THE LATTER VERTICALLY, FUSING A MONOCRYSTALLINE SEED CRYSTAL TO THE LOWER END OF SAID POLYCRYSTALLINE ROD TO FORM A LIQUID FUSED JUNCTION, SETTING THE SEED CRYSTAL IN ROTATION, DISPLACING THE MOLTEN ZONE INTO THE SEED CRYSTAL TO A LOCATION IN THE SEE CRYSTAL REMOVED FROM THE FUSED JUNCTION, SAID LOCATION BEING IN A MONOCRYSTAL REGION HAVING A HIGH DEGREE OF LATTICE PERFECTION THAN IN THE REGION OF SAID JUNCTION, IMMEDIATELY THEREAFTER COMMENCING THE FIRST ZONE PASS BY DISPLACING THE MOLTEN ZONE FROM THE SAID SEEN CRYSTAL LOCATION THROUGH SAID JUNCTION TO SAID POLYCRYSTALLINE ROD TO TRANSFORM SAID POLYCRYSTALLINE ROD INTO A SUBSTANTIALLY DISLOCATION-FREE MONOCRYSTALLINE ROD.
Claim 2
Dependent Claim
123 words
A CRUCIBLE-FREE FLOATING MOLTEN ZONE METOD FOR PRODUCING A MONOCRYSTALLINE SEMICONDUCTOR ROD FROM A POLYCRYSTALLINE ROD, COMPRISING SUPPORTING THE LATTER VERTICALLY, FUSING A MONOCRYSTALLINE SEED CRYSTAL TO THE LOWER END OF SAID POLYCRYSTALLINE ROD TO FORM A LIQUID FUSED JUNCTION, SETTING THE SEED CRYSTAL IN ROTATION, DISPLACING THE MOLTEN ZONE INTO THE SEED CRYSTAL TO A LOCATION IN THE SEE CRYSTAL REMOVED FROM THE FUSED JUNCTION, SAID LOCATION BEING IN A MONOCRYSTAL REGION HAVING A HIGH DEGREE OF LATTICE PERFECTION THAN IN THE REGION OF SAID JUNCTION, IMMEDIATELY THEREAFTER COMMENCING THE FIRST ZONE PASS BY DISPLACING THE MOLTEN ZONE FROM THE SAID SEEN CRYSTAL LOCATION THROUGH SAID JUNCTION TO SAID POLYCRYSTALLINE ROD TO TRANSFORM SAID POLYCRYSTALLINE ROD INTO A SUBSTANTIALLY DISLOCATION-FREE MONOCRYSTALLINE ROD.
References Cited (Backward Citations)
US2970111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |