GB1214679A - Furnace for obtaining crystals by pulling from a melt - Google Patents

Furnace for obtaining crystals by pulling from a melt

Info

Publication number
GB1214679A
GB1214679A GB1229569A GB1229569A GB1214679A GB 1214679 A GB1214679 A GB 1214679A GB 1229569 A GB1229569 A GB 1229569A GB 1229569 A GB1229569 A GB 1229569A GB 1214679 A GB1214679 A GB 1214679A
Authority
GB
United Kingdom
Prior art keywords
melt
crucible
pulling
movable
screen
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
Application number
GB1229569A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent SAS
Original Assignee
Compagnie Generale dElectricite SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Compagnie Generale dElectricite SA filed Critical Compagnie Generale dElectricite SA
Publication of GB1214679A publication Critical patent/GB1214679A/en
Expired legal-status Critical Current

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
    • C30B15/00—Single-crystal growth by pulling from a melt, e.g. Czochralski method
    • C30B15/14—Heating of the melt or the crystallised materials

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)
  • Liquid Deposition Of Substances Of Which Semiconductor Devices Are Composed (AREA)

Abstract

1,214,679. Crystal-pulling. COMPAGNIE GENERAL D'ELECTRICITE. 13 March, 1968 [14 March, 1967], No. 12295/68. Heading B1S. A garnet or ruby crystal is pulled with rotation from a rotary iridium crucible 4 in an oxygen-free atmosphere, employing a thermal gradient not exceeding 200‹C for a distance of 100 mm above the melt. The crucible is heated from below and at the sides by fixed resistance heaters 8 and the pulled rod is similarly heated by movable resistance heaters 13 and 14. Fixed screen 10 and movable screen 15 surround the crucible and rod resp. and a thermcouple is situated between each screen and annular heater. The crucible, movable heaters and movscreen are raised as pulling proceeds. Auxiliary heating of the surface of the melt is effected by passage of an electron beam from a generator 18 through a suitable opening. The temperature of the melt is measured by a device 19 through which the surface of the melt may be observed. The equipment within the furnace (except the crucible and generator) is of tungsten.
GB1229569A 1967-03-14 1968-03-13 Furnace for obtaining crystals by pulling from a melt Expired GB1214679A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR98711A FR1522416A (en) 1967-03-14 1967-03-14 Improvements to the process for obtaining crystals by printing

Publications (1)

Publication Number Publication Date
GB1214679A true GB1214679A (en) 1970-12-02

Family

ID=8626883

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1229569A Expired GB1214679A (en) 1967-03-14 1968-03-13 Furnace for obtaining crystals by pulling from a melt

Country Status (4)

Country Link
DE (1) DE1719499A1 (en)
FR (1) FR1522416A (en)
GB (1) GB1214679A (en)
NL (1) NL6803592A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4014656A (en) * 1973-10-03 1977-03-29 Siemens Aktiengesellschaft Monitoring device for crystal pulling apparatus
EP0140509A1 (en) * 1983-08-26 1985-05-08 Sumitomo Electric Industries Limited An lec method and apparatus for growing single crystal
CN109022813A (en) * 2018-10-19 2018-12-18 苏州苏丰机械科技有限公司 A kind of lateral horizontal drawing refinement furnace
CN115574796A (en) * 2022-11-18 2023-01-06 浙江晶盛机电股份有限公司 Centering calibration device and centering calibration method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4116642A (en) * 1976-12-15 1978-09-26 Western Electric Company, Inc. Method and apparatus for avoiding undesirable deposits in crystal growing operations

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4014656A (en) * 1973-10-03 1977-03-29 Siemens Aktiengesellschaft Monitoring device for crystal pulling apparatus
EP0140509A1 (en) * 1983-08-26 1985-05-08 Sumitomo Electric Industries Limited An lec method and apparatus for growing single crystal
CN109022813A (en) * 2018-10-19 2018-12-18 苏州苏丰机械科技有限公司 A kind of lateral horizontal drawing refinement furnace
CN115574796A (en) * 2022-11-18 2023-01-06 浙江晶盛机电股份有限公司 Centering calibration device and centering calibration method

Also Published As

Publication number Publication date
NL6803592A (en) 1968-09-16
DE1719499A1 (en) 1971-10-28
FR1522416A (en) 1968-04-26

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees