GB844813A - Zone melting apparatus - Google Patents

Zone melting apparatus

Info

Publication number
GB844813A
GB844813A GB12820/58A GB1282058A GB844813A GB 844813 A GB844813 A GB 844813A GB 12820/58 A GB12820/58 A GB 12820/58A GB 1282058 A GB1282058 A GB 1282058A GB 844813 A GB844813 A GB 844813A
Authority
GB
United Kingdom
Prior art keywords
rod
interface
zone
heat
molten zone
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
GB12820/58A
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products Inc
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 Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Publication of GB844813A publication Critical patent/GB844813A/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
    • C30B13/30—Stabilisation or shape controlling of the molten zone, e.g. by concentrators, by electromagnetic fields; Controlling the section of the crystal

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (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)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

<PICT:0844813/III/1> <PICT:0844813/III/2> In a method of zone-refining a rod of semiconductor material 10 (Fig. 1) by passing a molten zone along the rod, the molten zone 38 is produced by an induction coil 36 and is displaced upwards with respect to the coil 36 (see Fig. 2), whereby the induction field about the coil exerts a levitational force upon the zone permitting the treatment of a rod of greater diameter than if the molten zone is held in position by surface tension alone. The molten zone is displaced by decreasing the heat flux through the upper liquid-solid interface by heating the upper part of the rod 10 with a heater coil 40, and by increasing the heat flux through the lower liquid-solid interface by cooling the lower part of the rod with a water-cooled jacket 50. The same effect is obtained if direct current is passed through the rod so that Peltier heat is generated at the upper interface and absorbed at the lower interface, or if the molten zone is moved so that heat of crystallization is released at the upper interface and heat of fusion is consumed at the lower interface.
GB12820/58A 1957-05-01 1958-04-22 Zone melting apparatus Expired GB844813A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US844813XA 1957-05-01 1957-05-01

Publications (1)

Publication Number Publication Date
GB844813A true GB844813A (en) 1960-08-17

Family

ID=22185228

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12820/58A Expired GB844813A (en) 1957-05-01 1958-04-22 Zone melting apparatus

Country Status (3)

Country Link
DE (1) DE1106732B (en)
FR (1) FR1238717A (en)
GB (1) GB844813A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL287222A (en) * 1962-01-24
DE1219451B (en) * 1962-08-31 1966-06-23 Siemens Ag Process for the production of flat dendritic, elongated single crystals consisting of semiconductor material
NL301226A (en) * 1962-12-03
DE1297584B (en) * 1965-02-02 1969-06-19 Akademie D Wissenschaften Berl Method for crucible-free zone melting of a semiconductor rod
DE1282612B (en) * 1965-08-26 1968-11-14 Halbleiterwerk Frankfurt Oder Process for the homogenization of dopants in semiconductor single crystals

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959479C (en) * 1952-09-23 1957-03-07 Siemens Ag Method for pulling semiconductor crystals from a melt for electrically asymmetrically conductive systems with locally different concentrations of impurities
DE1061527B (en) * 1953-02-14 1959-07-16 Siemens Ag Process for zone-wise remelting of rods and other elongated workpieces
NL105554C (en) * 1955-01-13

Also Published As

Publication number Publication date
FR1238717A (en) 1960-08-19
DE1106732B (en) 1961-05-18

Similar Documents

Publication Publication Date Title
GB833290A (en) Improvements in or relating to processes and apparatus for the production of ultra-pure substances
GB908951A (en) Production of semiconductors and the like
GB844813A (en) Zone melting apparatus
GB876466A (en) A method of heat-treating a rod of semi-conductor material
GB900545A (en) Improvements in or relating to semi-conductor rods
GB790954A (en) Method of cleaning semiconductor material
GB915732A (en) Zone refining apparatus
GB986748A (en) Zone-by-zone melting of a rod of semi-conductor material
ES258156A1 (en) Method and means for growing and treating crystals
GB954991A (en) Improvements in or relating to methods of and apparatus for zone-melting
GB937190A (en) Process for the zone melting of rods of semi-conducting or conducting material
US3544757A (en) Method of melting a levitated mass
GB973754A (en) Improvements in or relating to moving-zone heat treatment of materials
GB1079870A (en) A method of melting a rod of crystalline material zone-by-zone
GB876467A (en) Improvements in or relating to apparatus for use in melting a zone of a rod of semi-conductor material
GB827676A (en) Method and apparatus for heat treating semi-conductor material
GB932668A (en) Improvements in or relating to methods of and apparatus for heat treatment of semi-conductor material
GB831303A (en) Improvements in or relating to refining processes for semi-conductor and other materials
SE7905726L (en) PROCEDURE AND DEVICE FOR HEATING A NON-IRON MATERIAL WITH LIQUID FUEL
GB903412A (en) Improvements in devices for use in crystal-pulling apparatus
GB930432A (en) Improvements in or relating to methods of making bodies of semi-conductor material
GB922286A (en) Improvements in or relating to purification of semi-conductor material by zone drawing
GB932661A (en) Improvements in or relating to methods of zone levelling rod-shaped bodies
GB816367A (en) Improvements in or relating to zone-melting processes
GB843460A (en) Improvements in or relating to apparatus for use in melting a zone of a rod of semi-conductor materlal