FR859693A - Improvements in the manufacture of asymmetric conductivity devices for alternating currents - Google Patents

Improvements in the manufacture of asymmetric conductivity devices for alternating currents

Info

Publication number
FR859693A
FR859693A FR859693DA FR859693A FR 859693 A FR859693 A FR 859693A FR 859693D A FR859693D A FR 859693DA FR 859693 A FR859693 A FR 859693A
Authority
FR
France
Prior art keywords
manufacture
alternating currents
conductivity devices
asymmetric conductivity
asymmetric
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
Other languages
French (fr)
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.)
COMPACNIE DES FREINS ET SIGNAU
Compagnie des Freins et Signaux Westinghouse SA
Original Assignee
COMPACNIE DES FREINS ET SIGNAU
Compagnie des Freins et Signaux Westinghouse SA
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 COMPACNIE DES FREINS ET SIGNAU, Compagnie des Freins et Signaux Westinghouse SA filed Critical COMPACNIE DES FREINS ET SIGNAU
Application granted granted Critical
Publication of FR859693A publication Critical patent/FR859693A/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)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Chemical Treatment Of Metals (AREA)
FR859693D 1938-12-28 1939-08-30 Improvements in the manufacture of asymmetric conductivity devices for alternating currents Expired FR859693A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37680/38A GB523216A (en) 1938-12-28 1938-12-28 Improvements relating to the manufacture of alternating current rectifiers

Publications (1)

Publication Number Publication Date
FR859693A true FR859693A (en) 1940-12-24

Family

ID=10398214

Family Applications (1)

Application Number Title Priority Date Filing Date
FR859693D Expired FR859693A (en) 1938-12-28 1939-08-30 Improvements in the manufacture of asymmetric conductivity devices for alternating currents

Country Status (5)

Country Link
US (1) US2266922A (en)
CH (1) CH263405A (en)
DE (1) DE856663C (en)
FR (1) FR859693A (en)
GB (1) GB523216A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL215047A (en) * 1941-05-07
BE471989A (en) * 1941-07-16
US2522474A (en) * 1942-07-02 1950-09-12 Battelle Memorial Institute Treatment of zinc surfaces
US2438923A (en) * 1943-02-11 1948-04-06 Fed Telephone & Radio Corp Method and means for making selenium elements
BE476039A (en) * 1943-07-30 1900-01-01
DE967323C (en) * 1943-08-06 1957-11-07 Siemens Ag Process for the production of selenium rectifiers, the top electrode of which is thallium added in small quantities
BE476268A (en) * 1945-05-12
NL148598B (en) * 1948-12-29 1900-01-01 Science Union & Cie METHOD FOR THE PREPARATION OF A MEDICINAL PRODUCT WHICH REDUCES THE TENDENCY OF PLATELETS TO CLUGGING AND STICKING TOGETHER AND SHOWS FIBRINOLYTIC ACTIVITY, A MEDICINAL PRODUCT WITH SUCH ACTIVITY, AND A METHOD FOR THE PREPARATION OF A MEDICINAL COMPOUND.
US2841749A (en) * 1955-04-11 1958-07-01 Sarkes Tarzian Selenium rectifier

Also Published As

Publication number Publication date
DE856663C (en) 1952-11-24
CH263405A (en) 1949-08-31
US2266922A (en) 1941-12-23
GB523216A (en) 1940-07-09

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