US2361157A - Alternating electric current rectifier of the selenium type - Google Patents

Alternating electric current rectifier of the selenium type Download PDF

Info

Publication number
US2361157A
US2361157A US479786A US47978643A US2361157A US 2361157 A US2361157 A US 2361157A US 479786 A US479786 A US 479786A US 47978643 A US47978643 A US 47978643A US 2361157 A US2361157 A US 2361157A
Authority
US
United States
Prior art keywords
selenium
thallium
electric current
layer
alternating electric
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
US479786A
Inventor
Thompson Leslie Ernest
Jenkins Alexander
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.)
Hitachi Rail STS USA Inc
Original Assignee
Union Switch and Signal Inc
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 Union Switch and Signal Inc filed Critical Union Switch and Signal Inc
Application granted granted Critical
Publication of US2361157A publication Critical patent/US2361157A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01L21/06—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 selenium or tellurium in uncombined form other than as impurities in semiconductor bodies of other materials
    • H01L21/12—Application of an electrode to the exposed surface of the selenium or tellurium after the selenium or tellurium has been applied to the foundation plate
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9265—Special properties
    • Y10S428/929—Electrical contact feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9335—Product by special process
    • Y10S428/94—Pressure bonding, e.g. explosive
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12681—Ga-, In-, Tl- or Group VA metal-base component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12986—Adjacent functionally defined components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31714—Next to natural gum, natural oil, rosin, lac or wax

Definitions

  • This invention relates to alternating 'electric current rectifiers of the selenium type comprising a base plate or support provided with a layer or mainly of thallium instead of the metals or alloys hitherto utilised.
  • the -A rectifier embodying the invention is found to possess important advantages, in particular the forward resistance of the rectifier is relatively low and by subjecting the rectifier to the I well known electric forming process the final re verse resistance is rendered unusually high.
  • the rectification ratio has thus a very high value while the so-called bottom bend characteristic is also relatively low.
  • the counter-electrode may be constituted by a layer of thallium foil applied to the selenium layer under considerable pressure.
  • the counter-electrode may however be formedin other ways as for example by spraying-but in any case since thallium is somewhat readily oxidised under atinospheric conditions, it is essential or very desirable that the thallium electrode should, after its application or formation be protected by a coat-' ing of another metal, varnish or other suitable material.
  • a rectifier comprising a base plate provided with-a layer of selenium, and a counter-electrode comprising a layer of thallium applied to the selenium layer.
  • a rectifier comprising a base plate provided with a layer of selenium, and a counter-electrode comprising a layer of thallium foil applied to the selenium layer under considerable pressure.
  • a rectifier comprising a base plate provided with a layer of selenium, a counter-electrode of thallium applied to the selenium layer, and a protective coating applied to said thallium electrode. 4.

Description

Patented Get. 24, 1944 UNITED STATES PATENT OFFICE ALTERNATING ELECTRIC CURRENTREOTI- FIER OF THE SELENIUM TYPE Leslie Ernest Thompson and Alexander Jenkins,
London, England, assignors, by mesnc assignments, to The Union Switch and Signal Company, Swissvalc, Pa., a corporation vania of Pennsyl- No Drawing. Application March 19, 1943," Serial No. 479,786. In Great Britain March 17, 1942 4- Claims.
This invention relates to alternating 'electric current rectifiers of the selenium type comprising a base plate or support provided with a layer or mainly of thallium instead of the metals or alloys hitherto utilised.
-A rectifier embodying the invention is found to possess important advantages, in particular the forward resistance of the rectifier is relatively low and by subjecting the rectifier to the I well known electric forming process the final re verse resistance is rendered unusually high. The rectification ratio has thus a very high value while the so-called bottom bend characteristic is also relatively low.
In carrying the invention into practice, the counter-electrode may be constituted by a layer of thallium foil applied to the selenium layer under considerable pressure. The counter-electrode may however be formedin other ways as for example by spraying-but in any case since thallium is somewhat readily oxidised under atinospheric conditions, it is essential or very desirable that the thallium electrode should, after its application or formation be protected by a coat-' ing of another metal, varnish or other suitable material.
The favourable characteristics of the improved rectifier above indicated may be still further increased by the addition of relatively small quantities of other metals or substances to the thallium counter-electrode so that the latter consists for example of a thallium alloy containing however a preponderating proportion of thallium and the invention may be varied in this and other respects without exceeding its scope.
Having thus described our invention, what we claim is:
1. A rectifier comprising a base plate provided with-a layer of selenium, and a counter-electrode comprising a layer of thallium applied to the selenium layer.
2. A rectifier comprising a base plate provided with a layer of selenium, and a counter-electrode comprising a layer of thallium foil applied to the selenium layer under considerable pressure.
3. A rectifier comprising a base plate provided with a layer of selenium, a counter-electrode of thallium applied to the selenium layer, and a protective coating applied to said thallium electrode. 4. A rectifiercomprising a base plate provided with a layer of selenium, a counter-electrode o! thallium applied ,to the selenium layer,.and a coating of varnish or another metal applied to said thallium electrode to prevent its oxidation.
LESLIE ERNEST THOMPSON. ALEXANDER JENKINS.
US479786A 1942-03-17 1943-03-19 Alternating electric current rectifier of the selenium type Expired - Lifetime US2361157A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3508/42A GB556152A (en) 1942-03-17 1942-03-17 Improvements relating to alternating electric current rectifiers of the selenium type

Publications (1)

Publication Number Publication Date
US2361157A true US2361157A (en) 1944-10-24

Family

ID=9759663

Family Applications (1)

Application Number Title Priority Date Filing Date
US479786A Expired - Lifetime US2361157A (en) 1942-03-17 1943-03-19 Alternating electric current rectifier of the selenium type

Country Status (3)

Country Link
US (1) US2361157A (en)
FR (1) FR932695A (en)
GB (1) GB556152A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458013A (en) * 1944-03-04 1949-01-04 Asea Ab Selenium rectifier element and method of manufacturing same
US2479301A (en) * 1947-11-29 1949-08-16 Westinghouse Electric Corp Selenium rectifier
US2496432A (en) * 1946-05-21 1950-02-07 Westinghouse Electric Corp Selenium rectifier
US2718688A (en) * 1949-07-30 1955-09-27 Siemens Ag Method of manufacturing dry rectifiers
US2762953A (en) * 1951-05-15 1956-09-11 Sylvania Electric Prod Contact rectifiers and methods
US2908592A (en) * 1939-01-22 1959-10-13 Int Standard Electric Corp Method of producing a selenium rectifier
US2920385A (en) * 1956-02-08 1960-01-12 Borg Warner Process of bonding carbon to aluminum

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE932812C (en) * 1948-10-02 1955-09-08 Siemens Ag Process for the production of dry rectifiers, in particular selenium rectifiers
DE950664C (en) * 1949-07-31 1956-10-11 Siemens Ag Process for the production of dry rectifiers, in particular selenium rectifiers
DE976468C (en) * 1949-08-15 1963-09-19 Licentia Gmbh Method for producing an excess semiconductor from a defect semiconductor
BE516364A (en) * 1951-12-20

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908592A (en) * 1939-01-22 1959-10-13 Int Standard Electric Corp Method of producing a selenium rectifier
US2458013A (en) * 1944-03-04 1949-01-04 Asea Ab Selenium rectifier element and method of manufacturing same
US2496432A (en) * 1946-05-21 1950-02-07 Westinghouse Electric Corp Selenium rectifier
US2479301A (en) * 1947-11-29 1949-08-16 Westinghouse Electric Corp Selenium rectifier
US2718688A (en) * 1949-07-30 1955-09-27 Siemens Ag Method of manufacturing dry rectifiers
US2762953A (en) * 1951-05-15 1956-09-11 Sylvania Electric Prod Contact rectifiers and methods
US2920385A (en) * 1956-02-08 1960-01-12 Borg Warner Process of bonding carbon to aluminum

Also Published As

Publication number Publication date
FR932695A (en) 1948-03-30
GB556152A (en) 1943-09-22

Similar Documents

Publication Publication Date Title
US2361157A (en) Alternating electric current rectifier of the selenium type
US2361211A (en) Lubrication of dies
US2279746A (en) Alternating electric current rectifier of the selenium type
US2380880A (en) Alternating electric current rectifier of the selenium type
US2380200A (en) Magnesium base alloy
US2162362A (en) Asymmetrical conductor
US1156169A (en) Alloy-surfaced metal.
GB464727A (en) Improvements in or relating to porous metallic products
US2286237A (en) Copper powder
US2378513A (en) Alternating current rectifier of the selenium type
US2229807A (en) Method of manufacturing selenium rectifiers
JPS6148544A (en) High-conductivity copper alloy and low softening temperature
GB1037187A (en) A process for the production of a highly doped p-conducting zone in a semiconductor body
US2328179A (en) Alternating electric current rectifier of the selenium type
US1706154A (en) Brazing alloys
US2311436A (en) Electrical contacts
US2015499A (en) Gold alloy
GB526618A (en) Zinc engraving plates
US1752239A (en) Protection of metals
ES439541A1 (en) Aluminium-based alloy
US2031113A (en) Alloys
GB543773A (en) Spraying metals
GB520005A (en) Asymmetrical resistance
US2261348A (en) Manufacture of rectifier elements
GB485956A (en) Method of plating metal