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US3134700A Expired / Lapsed US ⏱️ 0.0 years remaining

Dislocation removal by a last pass starting at a location displaced from the original seed into the grown crystal

Assignee: Siemens Schuckertwerke AG
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Filing: 1960-04-20
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Granted: 1964-05-26
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Expires: 1980-04-20
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Abstract

No abstract record available.

Inventors

  • 👤 Sporrer Ludwig

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 09:41
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/34; Y; Y10; Y10S; Y10S117/00; Y10S117/911; Y10S117/915

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 133 words
A CRUCIBLE-FREE, FLOATING MOLTEN ZONE METHOD OF MAKING A MONOCRYSTALLINE SILICON SEMICONDUCTOR SOLID BODY FROM A POLYCRYSTALLINE SILICON BODY, COMPRISING SUPPORTING THE POLYCRYSTALLINE SOLID BODY VERTICALLY, FUSING A MONOCRYSTALLINE SILICON SEED CRYSTAL TO THE POLYCRYSTALLINE SILICON BODY, HEATING A TRANSVERSE ZONE TO PRODUCE A MOLTEN ZONE EXTENDING OVER THE CROSS SECTION OF THE BODY, REPEATEDLY PASSING SAID MOLTEN ZONE ALONG SAID INITIALLY POLYCRYSTALLINE BODY IN ONE AND THE SAME DIRECTION, THE PASSES STARTING AT A POINT TO INCLUDE THE LOCATION OF FUSION OF THE SEED CRYSTAL TO THE POLYCRYSTALLINE BODY, THE PASSES CONVERTING POLYCRYSTALLINE TO MONOCRYSTALLINE SILICON, AND THEREAFTER PASSING SAID MOLTEN ZONE IN SAID DIRECTION BUT STARTING AT ANOTHER LOCATION REMOVED FROM SAID LOCATION OF FUSION OF THE SEED CRYSTAL BUT WITHIN THE ORIGINALLY POLYCRYSTALLNE SILICON BODY WHICH IS NOW MONOCRYSTALLINE SILICON.
Claim 2
Dependent Claim 133 words
A CRUCIBLE-FREE, FLOATING MOLTEN ZONE METHOD OF MAKING A MONOCRYSTALLINE SILICON SEMICONDUCTOR SOLID BODY FROM A POLYCRYSTALLINE SILICON BODY, COMPRISING SUPPORTING THE POLYCRYSTALLINE SOLID BODY VERTICALLY, FUSING A MONOCRYSTALLINE SILICON SEED CRYSTAL TO THE POLYCRYSTALLINE SILICON BODY, HEATING A TRANSVERSE ZONE TO PRODUCE A MOLTEN ZONE EXTENDING OVER THE CROSS SECTION OF THE BODY, REPEATEDLY PASSING SAID MOLTEN ZONE ALONG SAID INITIALLY POLYCRYSTALLINE BODY IN ONE AND THE SAME DIRECTION, THE PASSES STARTING AT A POINT TO INCLUDE THE LOCATION OF FUSION OF THE SEED CRYSTAL TO THE POLYCRYSTALLINE BODY, THE PASSES CONVERTING POLYCRYSTALLINE TO MONOCRYSTALLINE SILICON, AND THEREAFTER PASSING SAID MOLTEN ZONE IN SAID DIRECTION BUT STARTING AT ANOTHER LOCATION REMOVED FROM SAID LOCATION OF FUSION OF THE SEED CRYSTAL BUT WITHIN THE ORIGINALLY POLYCRYSTALLNE SILICON BODY WHICH IS NOW MONOCRYSTALLINE SILICON.

References Cited (Backward Citations)

US2768914A Cited
US2972525A Cited
US2907715A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1967-05-26 1967-11-25 1968-05-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1971-05-26 1971-11-25 1972-05-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1975-05-26 1975-11-25 1976-05-26 $7700.00 Window Closed / Lapsed

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