GB1379047A - Method for making a phosphor screen of a cathode ray tube - Google Patents

Method for making a phosphor screen of a cathode ray tube

Info

Publication number
GB1379047A
GB1379047A GB5610471A GB5610471A GB1379047A GB 1379047 A GB1379047 A GB 1379047A GB 5610471 A GB5610471 A GB 5610471A GB 5610471 A GB5610471 A GB 5610471A GB 1379047 A GB1379047 A GB 1379047A
Authority
GB
United Kingdom
Prior art keywords
layer
mask
exposure
apertures
dec
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
GB5610471A
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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB1379047A publication Critical patent/GB1379047A/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
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes

Abstract

1379047 Luminescent screens HITACHI Ltd 2 Dec 1971 [4 Dec 1970] 56104/71 Heading H1D In the manufacture of a colour television screen by exposing a photo-resist through a shadow mask 1, the apertures lc in the mask are effectively reduced in size by covering the mask with a light attenuating layer 2b and a photosensitive layer 2a which is exposed through the mask to leave light permeable dots 4 smaller than the apertures 1c. The layer 2a may be of material such as polyvinyl chloride which is sticky before exposure but loses its stickiness after exposure; light absorbent material 5 such as carbon is applied to the surface either before or after exposure so that it adheres only to the unexposed areas. Alternatively the layer 2a may be of photoconductive material such as polyvinyl carbazole. The layer 3 is a transparent binding layer which may be omitted. The screen may be of the type including opaque material in the interstices of the phosphor dots.
GB5610471A 1970-12-04 1971-12-02 Method for making a phosphor screen of a cathode ray tube Expired GB1379047A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10684570 1970-12-04

Publications (1)

Publication Number Publication Date
GB1379047A true GB1379047A (en) 1975-01-02

Family

ID=14443981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5610471A Expired GB1379047A (en) 1970-12-04 1971-12-02 Method for making a phosphor screen of a cathode ray tube

Country Status (4)

Country Link
US (1) US3775116A (en)
DE (1) DE2159626A1 (en)
FR (1) FR2117311A5 (en)
GB (1) GB1379047A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4924573A (en) * 1972-06-30 1974-03-05
US3931442A (en) * 1973-03-02 1976-01-06 Gte Sylvania Incorporated Temporary modification of a pattern mask for use in forming a color CRT screen and a process for modifying the same
US4223083A (en) * 1977-12-27 1980-09-16 Tektronix, Inc. Virtual mask exposure system for CRT screen manufacture
DE3323473A1 (en) * 1983-06-29 1985-01-03 Siemens AG, 1000 Berlin und 8000 München QUICK HEATING CATHODE

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB795908A (en) * 1955-06-24 1958-06-04 Zenith Radio Corp Improvements in or relating to methods of manufacturing colour cathode ray tubes
US3070441A (en) * 1958-02-27 1962-12-25 Rca Corp Art of manufacturing cathode-ray tubes of the focus-mask variety
US3653901A (en) * 1969-10-31 1972-04-04 Rca Corp Color kinescope production with a temporary mask

Also Published As

Publication number Publication date
FR2117311A5 (en) 1972-07-21
DE2159626A1 (en) 1972-06-22
US3775116A (en) 1973-11-27

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Legal Events

Date Code Title Description
429A Application made for amendment of specification (sect. 29/1949)
429H Application (made) for amendment of specification now open to opposition (sect. 29/1949)
429H Application (made) for amendment of specification now open to opposition (sect. 29/1949)
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee