US2663831A - Selenium dry-disk rectifier - Google Patents

Selenium dry-disk rectifier Download PDF

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Publication number
US2663831A
US2663831A US210288A US21028851A US2663831A US 2663831 A US2663831 A US 2663831A US 210288 A US210288 A US 210288A US 21028851 A US21028851 A US 21028851A US 2663831 A US2663831 A US 2663831A
Authority
US
United States
Prior art keywords
selenium
rectifier
ageing
selenium dry
layer
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 - Lifetime
Application number
US210288A
Other languages
English (en)
Inventor
Otto J Klein
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of US2663831A publication Critical patent/US2663831A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D48/00—Individual devices not covered by groups H10D1/00 - H10D44/00
    • H10D48/01—Manufacture or treatment
    • H10D48/04—Manufacture or treatment of devices having bodies comprising selenium or tellurium in uncombined form
    • H10D48/043—Preliminary treatment of the selenium or tellurium, its application to foundation plates or the subsequent treatment of the combination

Definitions

  • Selenium dry-disc rectifiers are basically built up in a way that on a base plate of some suitable material such as straight or nickel-plated iron, light metal, etc., there is applied a thin selenium coating on which a metallic back (counter) electrode of suitable composition is deposited.
  • Rectifier action is restricted to a thin layer which forms at the surface of the selenium facing the back electrode.
  • the overall selenium coating must have a certain minimum thickness to avoid short-circuits between the base plate and the back electrode.
  • the selenium layer proper is not identical however with the just mentioned thin rectifying layer forming at the selenium surface towards the back electrode. Strictly speaking, whatever selenium is not used in forming this barrier layer is superfluous, as it but causes a relatively high dropping resistance in the rectifying circuit so from the loss angle this portion of the rectifier should be made with a resistance as low as possible.
  • a selenium rectifier comprising a base plate, a layer on said base plate consisting of selenium containing admixtures of a halogen and aluminum oxide in which the aluminum oxide is present in said layer up to milligram-percent of the selenium, and a counter-electrode on said layer.

Landscapes

  • Thermistors And Varistors (AREA)
US210288A 1950-02-14 1951-02-09 Selenium dry-disk rectifier Expired - Lifetime US2663831A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE293548X 1950-02-14

Publications (1)

Publication Number Publication Date
US2663831A true US2663831A (en) 1953-12-22

Family

ID=6079896

Family Applications (1)

Application Number Title Priority Date Filing Date
US210288A Expired - Lifetime US2663831A (en) 1950-02-14 1951-02-09 Selenium dry-disk rectifier

Country Status (5)

Country Link
US (1) US2663831A (is")
BE (1) BE501244A (is")
CH (1) CH293548A (is")
FR (1) FR1032278A (is")
NL (1) NL159214B (is")

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2888620A (en) * 1956-04-30 1959-05-26 Westinghouse Air Brake Co High resistance semiconductor cells

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2137316A (en) * 1935-02-06 1938-11-22 Philips Nv Electrode system and method of making same
US2189576A (en) * 1935-06-22 1940-02-06 Gen Electric Dry plate rectifier and method of producing same
US2453763A (en) * 1945-07-07 1948-11-16 Ruben Samuel Selenium rectifier and process for making same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2137316A (en) * 1935-02-06 1938-11-22 Philips Nv Electrode system and method of making same
US2189576A (en) * 1935-06-22 1940-02-06 Gen Electric Dry plate rectifier and method of producing same
US2453763A (en) * 1945-07-07 1948-11-16 Ruben Samuel Selenium rectifier and process for making same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2888620A (en) * 1956-04-30 1959-05-26 Westinghouse Air Brake Co High resistance semiconductor cells

Also Published As

Publication number Publication date
FR1032278A (fr) 1953-06-30
CH293548A (de) 1953-09-30
BE501244A (is")
NL159214B (nl)

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