GB1362739A - Non-crucible zone melting - Google Patents
Non-crucible zone meltingInfo
- Publication number
- GB1362739A GB1362739A GB5522772A GB5522772A GB1362739A GB 1362739 A GB1362739 A GB 1362739A GB 5522772 A GB5522772 A GB 5522772A GB 5522772 A GB5522772 A GB 5522772A GB 1362739 A GB1362739 A GB 1362739A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rod
- sound
- zone
- sound generator
- melting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B13/00—Single-crystal growth by zone-melting; Refining by zone-melting
- C30B13/28—Controlling or regulating
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
1362739 Modified zone-melting SIEMENS AG 30 Nov 1972 [31 Jan 1972] 55227/72 Heading B1S In a process for zone-melting a semiconductor rod supported substantially vertically between two rod holders and in which the molten zone is formed by an annular induction heating device, energy in the form of pulses, e.g. of electric current or sound, is supplied to at least one end of the rod. In the case of the sound pulses they may be produce by a sound generator with a frequency of more than 20 kHz and transferred to the rod via a coupling element interposed between the rod end and the holder. The sound generator may be an ultrasonic or a coiled magnetostrictive or cooled prezo-electric sound generator. The process is preferably used to form thyristors which can be ignited in an overhead fashion, e.g. (III)-orientated silicon crystal wafers which posses a break in the specific electrical resistance in the centres of the crystalline wafers.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19722204486 DE2204486A1 (en) | 1972-01-31 | 1972-01-31 | METHOD FOR INFLUENCING THE RADIAL RESISTANCE DEVELOPMENT IN THE PRODUCTION OF A SEMICONDUCTOR SINGLE CRYSTAL ROD BY CRUCIBLE-FREE ZONE MELTING |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1362739A true GB1362739A (en) | 1974-08-07 |
Family
ID=5834581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5522772A Expired GB1362739A (en) | 1972-01-31 | 1972-11-30 | Non-crucible zone melting |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS4886705A (en) |
| DE (1) | DE2204486A1 (en) |
| FR (1) | FR2169959A1 (en) |
| GB (1) | GB1362739A (en) |
| IT (1) | IT971894B (en) |
| NL (1) | NL7213698A (en) |
-
1972
- 1972-01-31 DE DE19722204486 patent/DE2204486A1/en active Pending
- 1972-10-10 NL NL7213698A patent/NL7213698A/xx unknown
- 1972-11-30 GB GB5522772A patent/GB1362739A/en not_active Expired
- 1972-12-15 IT IT3294372A patent/IT971894B/en active
-
1973
- 1973-01-17 JP JP772273A patent/JPS4886705A/ja active Pending
- 1973-01-25 FR FR7302601A patent/FR2169959A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| IT971894B (en) | 1974-05-10 |
| DE2204486A1 (en) | 1973-08-09 |
| NL7213698A (en) | 1973-08-02 |
| JPS4886705A (en) | 1973-11-15 |
| FR2169959A1 (en) | 1973-09-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |