US2496432A - Selenium rectifier - Google Patents

Selenium rectifier Download PDF

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Publication number
US2496432A
US2496432A US671176A US67117646A US2496432A US 2496432 A US2496432 A US 2496432A US 671176 A US671176 A US 671176A US 67117646 A US67117646 A US 67117646A US 2496432 A US2496432 A US 2496432A
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US
United States
Prior art keywords
layer
selenium
counterelectrode
magnesium
aluminum
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
US671176A
Other languages
English (en)
Inventor
Wayne E Blackburn
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.)
Westinghouse Electric Corp
Original Assignee
Westinghouse 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
Priority to BE473354D priority Critical patent/BE473354A/xx
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US671176A priority patent/US2496432A/en
Priority to FR946245D priority patent/FR946245A/fr
Priority to FR946425D priority patent/FR946425A/fr
Priority to GB13525/47A priority patent/GB623857A/en
Application granted granted Critical
Publication of US2496432A publication Critical patent/US2496432A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C21/00—Digital stores in which the information circulates continuously
    • 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
    • H10D48/045—Treatment of the surface of the selenium or tellurium layer after having been made conductive
    • 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
    • H10D48/046—Provision of discrete insulating layers
    • 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
    • H10D48/047—Application of an electrode to the exposed surface of the selenium or tellurium after the selenium or tellurium has been applied to foundation plates

Definitions

  • My invention relates to selenium rectiers, and, in particular, relates to an improved method of rendering the junction between the selenium and the counterelectrode unilaterally conductive.
  • a number of different procedures for improving the unilateral nature of the above-mentioned junction have been employed in the prior art, such procedures being commonly referred to as the production of the blocking layer at the selenium surface.
  • One object of my invention is, accordingly, to provide an improved type of selenium rectifier.
  • ⁇ Another object of my invention is to provide an improved type of blocking layer for selenium rectiers.
  • Still another object of my invention is to produce a blocking layer for selenium rectifiers, which is particularly effective in withstanding high inverse voltages.
  • a suitable form in which the principles of my invention may be embodied comprises a base plate I which may be of steel, and which is preferably nickel-plated and sand-blasted on the surface.
  • a layer 2 of selenium which may be applied by dipping the plate I in a molten bath of selenium, and thereafter rotating the plate on a suitable spindle, or .other device, to throw off the excess of selenium, while molten, by centrifugal force.
  • the free surface of the selenium is then coated, in accordance with my invention, with a thin film 3 of one of the following metals: germanium, silicon, magnesium, aluminum, cerium, berryllium, indium.
  • This thin 1ayer of one of the above metals may, for example, be applied by vaporizing the metal and condensing it in an evacuated container.
  • the nlm is preferably made thin enough to permit diiusion through it by the materials of a counterelectrode l which is subsequently applied by metal spraying cadmium. or an alloy ot cadmium and tin.
  • the thickness of the above-mentioned thin nlm of metal may be about one micron.
  • the unit After deposition of the counterelectrode I, the unit is heat-treated at a temperature of about 200 C. for a period of about 2 hours. The unit may then be electrically formed by impressing,
  • the element is suitable for use in any of the standard connections of rectifier units well-known in the art.
  • the method of improving the unilaterallyconductive properties of the junction between the selenium and the counterelectrode in a selenium rectifier which comprises superposing a thin layer of metal selected from the group consisting of magnesium, aluminum and beryllium on the surface of the selenium and superposing on said layer a counterelectrode containing cadmium.
  • the method of producing a conducting element for electric circuits which comprises coating a base plate of metal with a layer of selenium, coating the free surface of the selenium with a thin layer of one or more metals selected from the group consisting of magnesium, aluminum and berryllium; depositing a layercontaining cadmium on the free surface of said layer, and heat-treating the unit thus formed.
  • An electric circuit element comprising a base plate having a layer of selenium deposited on a portion of its surface, a thin layer of one or more metals selected from the group consisting of magnesium, aluminum and beryllium and a counterelectrode containing cadmium superposed on the free surface of the last-mentioned layer.
  • An electric circuit element comprising a base plate --having a layer of selenium deposited on a portion of its surface, a layer of one or more metals selected from the group consisting of magnesium, aluminum and beryllium and a counterelectrode containing cadmium superposed on the free'surface of the last-mentioned layer, said layer being thin enough to permit diffusion through it by materials from said counterelectrode.

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  • Silicon Compounds (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Physical Vapour Deposition (AREA)
US671176A 1946-05-21 1946-05-21 Selenium rectifier Expired - Lifetime US2496432A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE473354D BE473354A (en)) 1946-05-21
US671176A US2496432A (en) 1946-05-21 1946-05-21 Selenium rectifier
FR946245D FR946245A (fr) 1946-05-21 1947-04-26 Systèmes répétiteurs d'impulsions électriques
FR946425D FR946425A (fr) 1946-05-21 1947-05-08 Redresseurs au sélénium
GB13525/47A GB623857A (en) 1946-05-21 1947-05-20 Improvements in or relating to selenium rectifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US671176A US2496432A (en) 1946-05-21 1946-05-21 Selenium rectifier

Publications (1)

Publication Number Publication Date
US2496432A true US2496432A (en) 1950-02-07

Family

ID=24693428

Family Applications (1)

Application Number Title Priority Date Filing Date
US671176A Expired - Lifetime US2496432A (en) 1946-05-21 1946-05-21 Selenium rectifier

Country Status (4)

Country Link
US (1) US2496432A (en))
BE (1) BE473354A (en))
FR (2) FR946245A (en))
GB (1) GB623857A (en))

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2650258A (en) * 1951-06-12 1953-08-25 Rca Corp Semiconductor photosensitive device
US2669663A (en) * 1951-11-30 1954-02-16 Rca Corp Semiconductor photoconducting device
US2701326A (en) * 1949-11-30 1955-02-01 Bell Telephone Labor Inc Semiconductor translating device
US2733390A (en) * 1952-06-25 1956-01-31 scanlon
DE952655C (de) * 1953-03-06 1956-11-22 Standard Elektrik Ag Verfahren zur Herstellung von gut formierbaren Selengleichrichterplatten mit niedriger Schleusenspannung
US2787745A (en) * 1951-12-20 1957-04-02 Int Standard Electric Corp Counter electrode for dry disk type rectifiers
US2804580A (en) * 1953-08-13 1957-08-27 Visseaux S A J Unidirectionally conducting elements
DE1025527B (de) * 1954-11-29 1958-03-06 Standard Elektrik Ag Selengleichrichter mit leitfaehigkeitserhoehenden Zusaetzen in der Selenschicht
US2858239A (en) * 1956-03-13 1958-10-28 Siemens Ag Method for producing selenium rectifiers
DE973817C (de) * 1951-03-05 1960-06-15 Licentia Gmbh Verfahren zur Herstellung eines Trockengleichrichters

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2096170A (en) * 1933-04-06 1937-10-19 Int Standard Electric Corp Light-sensitive device
US2361157A (en) * 1942-03-17 1944-10-24 Union Switch & Signal Co Alternating electric current rectifier of the selenium type
US2380880A (en) * 1942-10-19 1945-07-31 Union Switch & Signal Co Alternating electric current rectifier of the selenium type

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2096170A (en) * 1933-04-06 1937-10-19 Int Standard Electric Corp Light-sensitive device
US2361157A (en) * 1942-03-17 1944-10-24 Union Switch & Signal Co Alternating electric current rectifier of the selenium type
US2380880A (en) * 1942-10-19 1945-07-31 Union Switch & Signal Co Alternating electric current rectifier of the selenium type

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2701326A (en) * 1949-11-30 1955-02-01 Bell Telephone Labor Inc Semiconductor translating device
DE973817C (de) * 1951-03-05 1960-06-15 Licentia Gmbh Verfahren zur Herstellung eines Trockengleichrichters
US2650258A (en) * 1951-06-12 1953-08-25 Rca Corp Semiconductor photosensitive device
US2669663A (en) * 1951-11-30 1954-02-16 Rca Corp Semiconductor photoconducting device
US2787745A (en) * 1951-12-20 1957-04-02 Int Standard Electric Corp Counter electrode for dry disk type rectifiers
DE975845C (de) * 1951-12-20 1962-10-25 Standard Elek K Lorenz Ag Verfahren zur Herstellung von Selengleichrichterplatten mit mehrschichtiger Deckelektrode
US2733390A (en) * 1952-06-25 1956-01-31 scanlon
DE952655C (de) * 1953-03-06 1956-11-22 Standard Elektrik Ag Verfahren zur Herstellung von gut formierbaren Selengleichrichterplatten mit niedriger Schleusenspannung
US2804580A (en) * 1953-08-13 1957-08-27 Visseaux S A J Unidirectionally conducting elements
DE1025527B (de) * 1954-11-29 1958-03-06 Standard Elektrik Ag Selengleichrichter mit leitfaehigkeitserhoehenden Zusaetzen in der Selenschicht
US2858239A (en) * 1956-03-13 1958-10-28 Siemens Ag Method for producing selenium rectifiers

Also Published As

Publication number Publication date
BE473354A (en))
FR946245A (fr) 1949-05-27
FR946425A (fr) 1949-06-02
GB623857A (en) 1949-05-24

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