GB491785A - Improvements relating to the manufacture of alternating electric current rectifiers - Google Patents

Improvements relating to the manufacture of alternating electric current rectifiers

Info

Publication number
GB491785A
GB491785A GB3718/37A GB371837A GB491785A GB 491785 A GB491785 A GB 491785A GB 3718/37 A GB3718/37 A GB 3718/37A GB 371837 A GB371837 A GB 371837A GB 491785 A GB491785 A GB 491785A
Authority
GB
United Kingdom
Prior art keywords
manufacture
electric current
alternating electric
improvements relating
current rectifiers
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
GB3718/37A
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 Mobility Ltd
Original Assignee
Westinghouse Brake and Signal Co Ltd
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 Westinghouse Brake and Signal Co Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Priority to GB3718/37A priority Critical patent/GB491785A/en
Priority to DEW3259D priority patent/DE857527C/en
Priority to FR832708D priority patent/FR832708A/en
Priority to US188812A priority patent/US2201709A/en
Publication of GB491785A publication Critical patent/GB491785A/en
Priority to FR49946D priority patent/FR49946E/en
Priority to NL91228A priority patent/NL54236C/xx
Priority to DEW104793D priority patent/DE763878C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
    • H01L21/16—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising cuprous oxide or cuprous iodide
    • H01L21/161—Preparation of the foundation plate, preliminary treatment oxidation of the foundation plate, reduction treatment
    • H01L21/164—Oxidation and subsequent heat treatment of the foundation plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104—Forming layers
    • H01L21/02365—Forming inorganic semiconducting materials on a substrate
    • H01L21/02518—Deposited layers
    • H01L21/02521—Materials
    • H01L21/02565—Oxide semiconducting materials not being Group 12/16 materials, e.g. ternary compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104—Forming layers
    • H01L21/02365—Forming inorganic semiconducting materials on a substrate
    • H01L21/02612—Formation types
    • H01L21/02614—Transformation of metal, e.g. oxidation, nitridation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
    • H01L21/16—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising cuprous oxide or cuprous iodide
    • H01L21/161—Preparation of the foundation plate, preliminary treatment oxidation of the foundation plate, reduction treatment

Abstract

To improve the characteristics of a dry surface rectifier of the copper-copper oxide type, the copper &c. blanks are subjected to a heat treatment, at preferably 400-700 DEG C. and in vacuo, prior to the treatment for the formation thereon of the compound, e.g. oxide. The surface of the metal may be etched or otherwise chemically removed after the preliminary heat treatment.
GB3718/37A 1937-02-08 1937-02-08 Improvements relating to the manufacture of alternating electric current rectifiers Expired GB491785A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB3718/37A GB491785A (en) 1937-02-08 1937-02-08 Improvements relating to the manufacture of alternating electric current rectifiers
DEW3259D DE857527C (en) 1937-02-08 1937-09-21 Process for the manufacture of dry surface contact rectifiers
FR832708D FR832708A (en) 1937-02-08 1938-01-27 Improvements in the fabrication of asymmetric conductivity devices
US188812A US2201709A (en) 1937-02-08 1938-02-04 Manufacture of alternating electric current rectifiers
FR49946D FR49946E (en) 1937-02-08 1938-11-16 Improvements in the fabrication of asymmetric conductivity devices
NL91228A NL54236C (en) 1937-02-08 1938-12-24
DEW104793D DE763878C (en) 1937-02-08 1938-12-25 Process for manufacturing copper oxide rectifier elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3718/37A GB491785A (en) 1937-02-08 1937-02-08 Improvements relating to the manufacture of alternating electric current rectifiers

Publications (1)

Publication Number Publication Date
GB491785A true GB491785A (en) 1938-09-08

Family

ID=9763650

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3718/37A Expired GB491785A (en) 1937-02-08 1937-02-08 Improvements relating to the manufacture of alternating electric current rectifiers

Country Status (5)

Country Link
US (1) US2201709A (en)
DE (2) DE857527C (en)
FR (2) FR832708A (en)
GB (1) GB491785A (en)
NL (1) NL54236C (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508161A (en) * 1945-11-13 1950-05-16 Westinghouse Electric Corp Rectifier element
US5814164A (en) * 1994-11-09 1998-09-29 American Scientific Materials Technologies L.P. Thin-walled, monolithic iron oxide structures made from steels, and methods for manufacturing such structures
US6045628A (en) * 1996-04-30 2000-04-04 American Scientific Materials Technologies, L.P. Thin-walled monolithic metal oxide structures made from metals, and methods for manufacturing such structures
US6461562B1 (en) 1999-02-17 2002-10-08 American Scientific Materials Technologies, Lp Methods of making sintered metal oxide articles

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT111459B (en) * 1925-03-28 1928-11-26 Westinghouse Brake & Signal Method of manufacturing a rectifier.
US1936792A (en) * 1929-02-06 1933-11-28 Westinghouse Electric & Mfg Co Method of making copper oxide rectifiers for high voltage application
US1820166A (en) * 1930-06-18 1931-08-25 Union Switch & Signal Co Copper oxide rectifier

Also Published As

Publication number Publication date
NL54236C (en) 1943-04-15
FR832708A (en) 1938-10-03
DE763878C (en) 1952-10-06
DE857527C (en) 1952-12-01
FR49946E (en) 1939-09-22
US2201709A (en) 1940-05-21

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