FR832745A - Improvements in the fabrication of asymmetric conductivity devices - Google Patents

Improvements in the fabrication of asymmetric conductivity devices

Info

Publication number
FR832745A
FR832745A FR832745DA FR832745A FR 832745 A FR832745 A FR 832745A FR 832745D A FR832745D A FR 832745DA FR 832745 A FR832745 A FR 832745A
Authority
FR
France
Prior art keywords
fabrication
conductivity devices
asymmetric conductivity
asymmetric
devices
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.)
Compagnie des Freins et Signaux Westinghouse SA
Original Assignee
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 Compagnie des Freins et Signaux Westinghouse SA filed Critical Compagnie des Freins et Signaux Westinghouse SA
Application granted granted Critical
Publication of FR832745A publication Critical patent/FR832745A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/02—Pretreatment of the material to be coated

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
FR832745D 1937-02-18 1938-01-28 Improvements in the fabrication of asymmetric conductivity devices Expired FR832745A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB832745X 1937-02-18

Publications (1)

Publication Number Publication Date
FR832745A true FR832745A (en) 1938-10-03

Family

ID=10550141

Family Applications (1)

Application Number Title Priority Date Filing Date
FR832745D Expired FR832745A (en) 1937-02-18 1938-01-28 Improvements in the fabrication of asymmetric conductivity devices

Country Status (1)

Country Link
FR (1) FR832745A (en)

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