GB490682A - 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
GB490682A
GB490682A GB4933/37A GB493337A GB490682A GB 490682 A GB490682 A GB 490682A GB 4933/37 A GB4933/37 A GB 4933/37A GB 493337 A GB493337 A GB 493337A GB 490682 A GB490682 A GB 490682A
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
GB4933/37A
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 GB4933/37A priority Critical patent/GB490682A/en
Priority to US188813A priority patent/US2180026A/en
Publication of GB490682A publication Critical patent/GB490682A/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 potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
    • H01L21/16—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Thermistors And Varistors (AREA)

Abstract

In the construction of elements for dry surface rectifiers having metal blanks upon which the rectifying compound is formed under heat, the exposure, before arriving at the operative temperature, for example, that of oxidizing, is reduced or prevented as by coating with carbon, cupric oxide, graphite, or oil, &c., which coating will, when black, increase the heat absorption rate or will protect the surface until near oxidizing temperature when it will be burnt off.
GB4933/37A 1937-02-18 1937-02-18 Improvements relating to the manufacture of alternating electric current rectifiers Expired GB490682A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB4933/37A GB490682A (en) 1937-02-18 1937-02-18 Improvements relating to the manufacture of alternating electric current rectifiers
US188813A US2180026A (en) 1937-02-18 1938-02-04 Manufacture of alternating electric current rectifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4933/37A GB490682A (en) 1937-02-18 1937-02-18 Improvements relating to the manufacture of alternating electric current rectifiers

Publications (1)

Publication Number Publication Date
GB490682A true GB490682A (en) 1938-08-18

Family

ID=9786586

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4933/37A Expired GB490682A (en) 1937-02-18 1937-02-18 Improvements relating to the manufacture of alternating electric current rectifiers

Country Status (2)

Country Link
US (1) US2180026A (en)
GB (1) GB490682A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2484252A (en) * 1944-11-07 1949-10-11 Bell Telephone Labor Inc Asymmetrical conductor

Also Published As

Publication number Publication date
US2180026A (en) 1939-11-14

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