GB578673A - Improvements relating to the manufacture of alternating electric current rectifiers of the selenium type - Google Patents

Improvements relating to the manufacture of alternating electric current rectifiers of the selenium type

Info

Publication number
GB578673A
GB578673A GB391544A GB391544A GB578673A GB 578673 A GB578673 A GB 578673A GB 391544 A GB391544 A GB 391544A GB 391544 A GB391544 A GB 391544A GB 578673 A GB578673 A GB 578673A
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
GB391544A
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 GB391544A priority Critical patent/GB578673A/en
Publication of GB578673A publication Critical patent/GB578673A/en
Priority to DEW3518A priority patent/DE840121C/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
    • H01L21/06—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 selenium or tellurium in uncombined form other than as impurities in semiconductor bodies of other materials
    • H01L21/10—Preliminary treatment of the selenium or tellurium, its application to the foundation plate, or the subsequent treatment of the combination
    • H01L21/105—Treatment of the surface of the selenium or tellurium layer after having been made conductive

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)
  • Liquid Deposition Of Substances Of Which Semiconductor Devices Are Composed (AREA)
  • Thermistors And Varistors (AREA)

Abstract

578,673. Asymmetrically-conducting resistances. WESTINGHOUSE BRAKE & SIGNAL CO., Ltd., THOMPSON, L.E., and JENKINS, A. March 2, 1944, No.3915. [Class 37] In the manufacture of selenium rectifiers such as in Specifications 523,216 and 532,961, the element is treated by immersion in a bath consisting of or containing a sodium sulphur compound, e.g., sodium sulphide, or sodium thiosulphate, a forming electric current being passed through the bath during treatment.
GB391544A 1944-03-02 1944-03-02 Improvements relating to the manufacture of alternating electric current rectifiers of the selenium type Expired GB578673A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB391544A GB578673A (en) 1944-03-02 1944-03-02 Improvements relating to the manufacture of alternating electric current rectifiers of the selenium type
DEW3518A DE840121C (en) 1944-03-02 1950-09-08 Method of manufacturing selenium AC rectifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB391544A GB578673A (en) 1944-03-02 1944-03-02 Improvements relating to the manufacture of alternating electric current rectifiers of the selenium type

Publications (1)

Publication Number Publication Date
GB578673A true GB578673A (en) 1946-07-08

Family

ID=9767277

Family Applications (1)

Application Number Title Priority Date Filing Date
GB391544A Expired GB578673A (en) 1944-03-02 1944-03-02 Improvements relating to the manufacture of alternating electric current rectifiers of the selenium type

Country Status (2)

Country Link
DE (1) DE840121C (en)
GB (1) GB578673A (en)

Also Published As

Publication number Publication date
DE840121C (en) 1952-05-29

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