Patent US3746496A successfully refreshed from Google Patents.
US3746496A
Expired / Lapsed
US
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Device for producing tubular bodies of semiconductor material, preferably silicon or germanium
Assignee: Siemens AG
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Filing: 1971-02-08
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Granted: 1973-07-17
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Expires: 1991-02-08
Abstract
Abstract A device for producing tubular bodies of semiconductor material, preferably of silicon or germanium. To this end, a rod or tube shaped carrier is heated in a reaction gas for precipitating the respective semiconductor, as a result of which the jacket area of the carrier is coated with a layer of the semiconductor. Following the removal of the carrier, this semiconductor layer defines the desired tube. At least two vertical carriers of carbon material, e.g. graphite, are each held at their lower ends by an electrode, and are connected at their upper ends by a conductive bridge, preferably of carbon.
Inventors
- 👤 W Dietze
- 👤 K Reuschel
- 👤 H Sandmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:47
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/02; C30B29/06; C23; C23C; C23C16/00; C23C16/01; C23C16/22; C30B25/00; C30B25/02; C30B29/60
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
17 words
The device of claim 1, wherein silicon or germanium is produced and the conductive bridge is carbon.
Claim 2
Dependent Claim
13 words
The device of claim 1, wherein said coolant is hydrogen, nitrogen, or argon.
Claim 3
Dependent Claim
49 words
The device of claim 3, whereby the bridge that connects the upper ends of the carriers with each other comprises, and the direct holders of the carriers are of the same material as said carriers, the carrier being inserted with its ends into appropriate fitted recesses of said bridge.
Claim 4
Dependent Claim
47 words
The device of claim 4, wherein the upper ends of two adjacent carriers are fitted into recesses of the connecting bridge, whereby gaseous coolant, which is introduced at the lower end of the tubular carrier, emerges at the upper end of said carriers, into the reaction chamber.
Claim 5
Dependent Claim
15 words
The device of claim 4, wherein both tubular carriers are arranged concentrically to each other.
Claim 6
Dependent Claim
27 words
The device of claim 6, wherein the interspace between both concentric carriers and the tubular interior of the inside carrier is provided for flow of the coolant.
Claim 7
Dependent Claim
55 words
The device of claim 7, wherein the upper ends of both concentric carriers are interconnected by a bridge, which seals the space between both carriers and the tubular interior of the inside carrier, against the reaction chamber in the wall of the inner carrier, forming a continuous channel service for the passage of the coolant.
Claim 8
Dependent Claim
23 words
The device of claim 5, wherein the coolant employed mixes with the gases in the reaction chamber, and is removed with the same.
Claim 9
Dependent Claim
30 words
The device of claim 6, wherein tubular concentric carriers are held by electrodes formed by concentric tubes and are heatable by current flowing via said electrodes and the interconnecting bridge.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |