GB1230726A - - Google Patents
Info
- Publication number
- GB1230726A GB1230726A GB1230726DA GB1230726A GB 1230726 A GB1230726 A GB 1230726A GB 1230726D A GB1230726D A GB 1230726DA GB 1230726 A GB1230726 A GB 1230726A
- Authority
- GB
- United Kingdom
- Prior art keywords
- zone
- coil
- zonemelting
- zonemelted
- siemens
- 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
- C30B13/16—Heating of the molten zone
- C30B13/20—Heating of the molten zone by induction, e.g. hot wire technique
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)
- Manufacture And Refinement Of Metals (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- General Induction Heating (AREA)
- Furnace Details (AREA)
Abstract
1,230,726. Zone-melting. SIEMENS A.G. 29 May, 1969 [30 May, 1968], No. 27363/69. Heading B1S. A rod of semi-conductor material is zonemelted using a single turn induction coil having a laterally elongate cross-section which increases in thickness from the inside, reaching a maximum at the outside, e.g. by tapering (Fig. 1) or stepping, or an intermediate point (as shown). In the latter case, the internal side of the coil complements the shape of the molten zone. The ratio of external to internal width may be greater than 1.5 to 1. The zonemelting process may be effected in hydrogen and/or rare gas or in a vacuum. It may involve formation of a constriction (Specification 926,497) or lateral shifting (Specification 1,044,592).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH804468A CH472236A (en) | 1968-05-30 | 1968-05-30 | Device for crucible-free zone melting of a crystalline rod, in particular a semiconductor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1230726A true GB1230726A (en) | 1971-05-05 |
Family
ID=4334271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1230726D Expired GB1230726A (en) | 1968-05-30 | 1969-05-29 |
Country Status (9)
| Country | Link |
|---|---|
| BE (1) | BE733780A (en) |
| CH (1) | CH472236A (en) |
| DE (1) | DE1809847B2 (en) |
| DK (1) | DK120434B (en) |
| ES (1) | ES367833A1 (en) |
| FR (1) | FR2009656A1 (en) |
| GB (1) | GB1230726A (en) |
| NL (1) | NL6905939A (en) |
| SE (1) | SE359753B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4851628A (en) * | 1988-02-18 | 1989-07-25 | Wacker-Chemitronic Gesellschaft Fur Elektronik-Grundstoffe Mbh | Method for the crucible-free floating zone pulling of semiconductor rods and an induction heating coil therefor |
| US4942279A (en) * | 1987-05-25 | 1990-07-17 | Shin-Etsu Handotai Co., Ltd. | RF induction heating apparatus for floating-zone melting |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3625669A1 (en) * | 1986-07-29 | 1988-02-04 | Siemens Ag | INDUCTION HEATER FOR POT-FREE ZONE MELTING |
-
1968
- 1968-05-30 CH CH804468A patent/CH472236A/en not_active IP Right Cessation
- 1968-11-15 DE DE19681809847 patent/DE1809847B2/en active Granted
-
1969
- 1969-04-11 DK DK199969A patent/DK120434B/en not_active IP Right Cessation
- 1969-04-17 NL NL6905939A patent/NL6905939A/xx not_active Application Discontinuation
- 1969-05-29 BE BE733780D patent/BE733780A/xx unknown
- 1969-05-29 FR FR6917596A patent/FR2009656A1/fr not_active Withdrawn
- 1969-05-29 ES ES367833A patent/ES367833A1/en not_active Expired
- 1969-05-29 SE SE757269A patent/SE359753B/xx unknown
- 1969-05-29 GB GB1230726D patent/GB1230726A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4942279A (en) * | 1987-05-25 | 1990-07-17 | Shin-Etsu Handotai Co., Ltd. | RF induction heating apparatus for floating-zone melting |
| US4851628A (en) * | 1988-02-18 | 1989-07-25 | Wacker-Chemitronic Gesellschaft Fur Elektronik-Grundstoffe Mbh | Method for the crucible-free floating zone pulling of semiconductor rods and an induction heating coil therefor |
| JPH01252596A (en) * | 1988-02-18 | 1989-10-09 | Wacker Chemitronic Ges Elektron Grundstoffe Mbh | Crucible free draw-up method of semiconductor rod and induction heating coil used therein |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1809847C3 (en) | 1974-04-18 |
| DE1809847B2 (en) | 1973-09-06 |
| SE359753B (en) | 1973-09-10 |
| NL6905939A (en) | 1969-12-02 |
| CH472236A (en) | 1969-05-15 |
| DK120434B (en) | 1971-06-01 |
| ES367833A1 (en) | 1971-04-16 |
| DE1809847A1 (en) | 1969-12-11 |
| BE733780A (en) | 1969-11-03 |
| FR2009656A1 (en) | 1970-02-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |