GB1489413A - Apparatus for pulling a crystal from a melt - Google Patents

Apparatus for pulling a crystal from a melt

Info

Publication number
GB1489413A
GB1489413A GB4264774A GB4264774A GB1489413A GB 1489413 A GB1489413 A GB 1489413A GB 4264774 A GB4264774 A GB 4264774A GB 4264774 A GB4264774 A GB 4264774A GB 1489413 A GB1489413 A GB 1489413A
Authority
GB
United Kingdom
Prior art keywords
melt
pulling
chamber
crystal
ports
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
GB4264774A
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.)
Siemens AG
Original Assignee
Siemens AG
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
Priority claimed from DE19732349718 external-priority patent/DE2349718A1/en
Priority claimed from DE19732349736 external-priority patent/DE2349736A1/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of GB1489413A publication Critical patent/GB1489413A/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
    • C30B15/20—Controlling or regulating
    • C30B15/22—Stabilisation or shape controlling of the molten zone near the pulled crystal; Controlling the section of the crystal
    • C30B15/26—Stabilisation or shape controlling of the molten zone near the pulled crystal; Controlling the section of the crystal using television detectors; using photo or X-ray detectors

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

1489413 Apparatus for crystal pulling SIEMENS AG 1 Oct 1974 [3 Oct 1973 (2)] 42647/74 Heading BIS An apparatus for pulling a crystal from a melt comprises a pressure chamber 30 containing a melt in a crucible 38 and fitted with a pulling mechanism 50 and pressure tight observation ports 40, 41, 42 each comprising a long rod of transparent refractory material e.g. quartz 44, 46 one end of which can be viewed from outside the chamber and the other end of which extends from the chamber wall into the chamber to a position near the melt surface. During crystal pulling of e.g. gallium phosphide the end of the quartz rod nearest the melt will rise in temperature to about 600‹C and volatile constituents of the melt do not condense thereon and obscure visibility, unlike conventional viewing ports. A television camera 60 may be used for viewing through the ports.
GB4264774A 1973-10-03 1974-10-01 Apparatus for pulling a crystal from a melt Expired GB1489413A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19732349718 DE2349718A1 (en) 1973-10-03 1973-10-03 High pressure crystal pulling furnace - with symmetrical arrangement of support, pulling chamber and seed crystal holder
DE19732349736 DE2349736A1 (en) 1973-10-03 1973-10-03 MONITORING DEVICE FOR A DEVICE FOR PULLING CRYSTALS FROM THE MELT

Publications (1)

Publication Number Publication Date
GB1489413A true GB1489413A (en) 1977-10-19

Family

ID=25765897

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4264774A Expired GB1489413A (en) 1973-10-03 1974-10-01 Apparatus for pulling a crystal from a melt

Country Status (1)

Country Link
GB (1) GB1489413A (en)

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414E Application relinquished (sect. 14/1949)
CSNS Application of which complete specification have been accepted and published, but patent is not sealed