FR2209856A1 - Electrodeposition of thin, parallel metal discs - with large dia, on a treated optically ground glass surface - Google Patents

Electrodeposition of thin, parallel metal discs - with large dia, on a treated optically ground glass surface

Info

Publication number
FR2209856A1
FR2209856A1 FR7243741A FR7243741A FR2209856A1 FR 2209856 A1 FR2209856 A1 FR 2209856A1 FR 7243741 A FR7243741 A FR 7243741A FR 7243741 A FR7243741 A FR 7243741A FR 2209856 A1 FR2209856 A1 FR 2209856A1
Authority
FR
France
Prior art keywords
thin
optically ground
electrodeposition
glass surface
metal
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.)
Granted
Application number
FR7243741A
Other languages
French (fr)
Other versions
FR2209856B1 (en
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.)
Thales SA
Original Assignee
Thomson CSF 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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR7243741A priority Critical patent/FR2209856A1/en
Priority to DE19732360613 priority patent/DE2360613A1/en
Priority to JP13623173A priority patent/JPS4988733A/ja
Publication of FR2209856A1 publication Critical patent/FR2209856A1/en
Application granted granted Critical
Publication of FR2209856B1 publication Critical patent/FR2209856B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D1/00—Electroforming
    • C25D1/04—Wires; Strips; Foils

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

Thin, layer dia, high surface finish, high parallelity metal disks are made using a solid cylindrical block with two optically ground absolutely parallel surfaces, which is first flash or vacuum coated with a thin conducting surface film on one surface on which a metal deposit of the required thickness is electrolytically deposited. The metal disk is then trepanned out from this deposit by a suitable tool producing a circumferential groove the depth of which equals the film thickness. The second optically ground surface is used as reference surface. The first film consists of Ag. The method is used for prodn. of video forming dies, which require extremely accurate metal disks.
FR7243741A 1972-12-08 1972-12-08 Electrodeposition of thin, parallel metal discs - with large dia, on a treated optically ground glass surface Granted FR2209856A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7243741A FR2209856A1 (en) 1972-12-08 1972-12-08 Electrodeposition of thin, parallel metal discs - with large dia, on a treated optically ground glass surface
DE19732360613 DE2360613A1 (en) 1972-12-08 1973-12-05 PROCESS FOR MANUFACTURING METAL DISCS WITH LARGE DIAMETER, LOW THICKNESS AND EXACTLY PARALLEL SURFACES
JP13623173A JPS4988733A (en) 1972-12-08 1973-12-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7243741A FR2209856A1 (en) 1972-12-08 1972-12-08 Electrodeposition of thin, parallel metal discs - with large dia, on a treated optically ground glass surface

Publications (2)

Publication Number Publication Date
FR2209856A1 true FR2209856A1 (en) 1974-07-05
FR2209856B1 FR2209856B1 (en) 1976-01-30

Family

ID=9108409

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7243741A Granted FR2209856A1 (en) 1972-12-08 1972-12-08 Electrodeposition of thin, parallel metal discs - with large dia, on a treated optically ground glass surface

Country Status (3)

Country Link
JP (1) JPS4988733A (en)
DE (1) DE2360613A1 (en)
FR (1) FR2209856A1 (en)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Also Published As

Publication number Publication date
JPS4988733A (en) 1974-08-24
FR2209856B1 (en) 1976-01-30
DE2360613A1 (en) 1974-06-12

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Legal Events

Date Code Title Description
ST Notification of lapse