GB907478A - Improvements in or relating to apparatus for use in the zone-by-zone melting of a rod of fusible material - Google Patents

Improvements in or relating to apparatus for use in the zone-by-zone melting of a rod of fusible material

Info

Publication number
GB907478A
GB907478A GB28108/59A GB2810859A GB907478A GB 907478 A GB907478 A GB 907478A GB 28108/59 A GB28108/59 A GB 28108/59A GB 2810859 A GB2810859 A GB 2810859A GB 907478 A GB907478 A GB 907478A
Authority
GB
United Kingdom
Prior art keywords
holder
molten zone
formation
rotation
rod
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
GB28108/59A
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 Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
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
Application filed by Siemens Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Publication of GB907478A publication Critical patent/GB907478A/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
    • C30B13/00—Single-crystal growth by zone-melting; Refining by zone-melting
    • C30B13/28—Controlling or regulating
    • 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
    • C30B13/285—Crystal holders, e.g. chucks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T117/00—Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor
    • Y10T117/10—Apparatus
    • Y10T117/1004—Apparatus with means for measuring, testing, or sensing
    • Y10T117/1008—Apparatus with means for measuring, testing, or sensing with responsive control means

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Induction Heating (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Arc Welding Control (AREA)

Abstract

In the treatment of a fusible rod by the passage of a molten zone through the rod while one end is maintained stationary and the other end is rotated, formation of the molten zone is effected while a torque is applied to the first mentioned end and the second mentioned end is held stationary. Rotation of the first mentioned end takes place on formation of the molten zone and is used to detect such formation. Rotation may be delayed by the use of an oil damping device. The torque may be produced by a spring or by <PICT:0907478/III/1> <PICT:0907478/III/2> the coaction of a current-carrying coil and a permanent magnet. Solidification of the molten zone may be detected by rotation of the first mentioned end. As shown in Fig. 1 a rod holder 9 depends into a vacuum vessel 2 from a rotatable mounting in a cap 3 and is engaged by a magnetic clutch with an inverted U-shaped member 13 which is rotatably mounted on cap 3. The magnetic clutch is constituted by a pair of soft iron armatures 11 forming part of holder 9 and a pair of bar magnets 12 forming part of member 13. A torque is produced by a coil 20 and a permanent magnet 19 in member 13 and is transmitted by the magnetic clutch to holder 9. Formation of the molten zone, the lower holder (not shown) being stationary, causes rotation of the holder 9 and member 13 until a pin 24 on member 13 contacts a stop 23 on cap 3. Such a contact may produce an electrical signal. A second stop 23 enables to and fro movement a number of times to provide a delay before the signal is given. Initial delay may be provided by an oil damping device comprising vanes 17 attached to member 13 and rotating in an oil bath 3A. Solidification of the molten zone while the lower holder is being rotated breaks the magnetic clutch and causes rotation of the holder 9 only, thereby bringing one of the soft iron armatures adjacent a bar magnet 28 (Fig. 2) which moves so as to produce a signal or disconnect a circuit.
GB28108/59A 1958-08-16 1959-08-17 Improvements in or relating to apparatus for use in the zone-by-zone melting of a rod of fusible material Expired GB907478A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES59437A DE1141086B (en) 1958-08-16 1958-08-16 Device for monitoring the melted state of a melting zone during crucible-free zone melting

Publications (1)

Publication Number Publication Date
GB907478A true GB907478A (en) 1962-10-03

Family

ID=7493311

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28108/59A Expired GB907478A (en) 1958-08-16 1959-08-17 Improvements in or relating to apparatus for use in the zone-by-zone melting of a rod of fusible material

Country Status (7)

Country Link
US (1) US3009973A (en)
BE (1) BE581687A (en)
CH (1) CH373193A (en)
DE (1) DE1141086B (en)
FR (1) FR1232565A (en)
GB (1) GB907478A (en)
NL (2) NL240020A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1165882B (en) * 1960-02-05 1964-03-19 Philips Patentverwaltung Device for executing rotary movements on rod-shaped bodies, in particular on semiconductor bodies
US3211881A (en) * 1962-08-28 1965-10-12 Westinghouse Electric Corp Apparatus for zone heating
US4176002A (en) * 1974-08-21 1979-11-27 Agence Nationale De Valorisation De La Recherche (Anvar) Controlling the melt temperature during zone refining and Czochralski crystal growth by sensing the viscous torque of the melt zone during operation

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2362398A (en) * 1942-08-01 1944-11-07 Ralph R Pittman Thermally responsive device
DE1061527B (en) * 1953-02-14 1959-07-16 Siemens Ag Process for zone-wise remelting of rods and other elongated workpieces
US2764027A (en) * 1954-04-19 1956-09-25 Otto Walter Thermal fuse
US2870309A (en) * 1957-06-11 1959-01-20 Emil R Capita Zone purification device
DE1092576B (en) * 1957-11-15 1960-11-10 Siemens Ag Power supply for the movable heating coil of a crucible-free zone pulling device inside a vessel

Also Published As

Publication number Publication date
DE1141086B (en) 1962-12-13
BE581687A (en)
CH373193A (en) 1963-11-15
US3009973A (en) 1961-11-21
NL113487C (en)
NL240020A (en)
FR1232565A (en) 1960-10-10

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