GB1433291A - Method of manufacturing a colour picture tube - Google Patents

Method of manufacturing a colour picture tube

Info

Publication number
GB1433291A
GB1433291A GB410574A GB410574A GB1433291A GB 1433291 A GB1433291 A GB 1433291A GB 410574 A GB410574 A GB 410574A GB 410574 A GB410574 A GB 410574A GB 1433291 A GB1433291 A GB 1433291A
Authority
GB
United Kingdom
Prior art keywords
apertures
cbr
etching
manufacturing
manufacture
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
GB410574A
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 Ltd
Original Assignee
Hitachi Ltd
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 claimed from JP48041397A external-priority patent/JPS49130670A/ja
Priority claimed from JP4140473A external-priority patent/JPS49132978A/ja
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB1433291A publication Critical patent/GB1433291A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
    • H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes
    • H01J9/144—Mask treatment related to the process of dot deposition during manufacture of luminescent screen

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

1433291 Etching HITACHI LTD 29 Jan 1974 [13 April 1973 (2)] 4105/74 Heading B6J [Also in Division H1] In a method of manufacture of a colour television tube in which apertures are etched in a shadow mask, which is then used in the manufacture of the phosphor screen of the tube whereafter the apertures are enlarged by further etching (see Division H1), the walls of the initial apertures are provided, by a photographic technique (not described), with a photoresist material 4 which extends up to the required final aperture size on each surface of the mask and the remainder of the surfaces are coated with an etch resistant material 5 which may be C, CBr, CBr 2 , CBr 3 , or CW. The photoresist material is then removed and the apertures enlarged to their final size by etching e.g. with ferric chloride, Fig. 2d.
GB410574A 1973-04-13 1974-01-29 Method of manufacturing a colour picture tube Expired GB1433291A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP48041397A JPS49130670A (en) 1973-04-13 1973-04-13
JP4140473A JPS49132978A (en) 1973-04-13 1973-04-13

Publications (1)

Publication Number Publication Date
GB1433291A true GB1433291A (en) 1976-04-22

Family

ID=26381001

Family Applications (1)

Application Number Title Priority Date Filing Date
GB410574A Expired GB1433291A (en) 1973-04-13 1974-01-29 Method of manufacturing a colour picture tube

Country Status (3)

Country Link
DE (1) DE2404402B2 (en)
FR (1) FR2225830B1 (en)
GB (1) GB1433291A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3125075C2 (en) * 1980-07-16 1987-01-15 N.V. Philips' Gloeilampenfabrieken, Eindhoven Color picture tube

Also Published As

Publication number Publication date
DE2404402B2 (en) 1977-03-10
DE2404402A1 (en) 1974-11-07
FR2225830A1 (en) 1974-11-08
FR2225830B1 (en) 1977-06-10

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee