JPS57176648A - Shadow mask electrode for color picture tube - Google Patents

Shadow mask electrode for color picture tube

Info

Publication number
JPS57176648A
JPS57176648A JP6138381A JP6138381A JPS57176648A JP S57176648 A JPS57176648 A JP S57176648A JP 6138381 A JP6138381 A JP 6138381A JP 6138381 A JP6138381 A JP 6138381A JP S57176648 A JPS57176648 A JP S57176648A
Authority
JP
Japan
Prior art keywords
etching
electron
passing hole
condition
knife edges
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
JP6138381A
Other languages
Japanese (ja)
Other versions
JPH0352172B2 (en
Inventor
Yasuhisa Otake
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6138381A priority Critical patent/JPS57176648A/en
Publication of JPS57176648A publication Critical patent/JPS57176648A/en
Publication of JPH0352172B2 publication Critical patent/JPH0352172B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/80—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching
    • H01J29/81—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching using shadow masks

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

PURPOSE:To prevent the development of any strain of an electrostatic lens formed within an electron-beam-passing hole provided in a shadow mask electrode, and prevent any generation of a fatal phenomenon such as discharge or an insulation breakdown by making the electron-beam-passing hole to have no angular parts such as knife edges. CONSTITUTION:After a desired electron-beam-passing hole is formed by use of the usual technique of photoetching, a photosensitive film is removed, and another etching is performed. Here, for the purpose of suppressing the electron-beam-passing holes from becoming larger by re-etching as far as possible and of giving roundness to the knife edges, re-etching is carried out in a condition milder than the condition of the former etching process, by an immersion method or a spray method of low spray pressure, by use of an etching liquid which has a lower temperature and a higher specific gravity than those of an etching liquid used for the former etching process. Since the knife edges are concentrically etched during the re-etching carried out inthe milder condition, the diameter of the electron-beam-passing hole is enlarged to only a small degree.
JP6138381A 1981-04-24 1981-04-24 Shadow mask electrode for color picture tube Granted JPS57176648A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6138381A JPS57176648A (en) 1981-04-24 1981-04-24 Shadow mask electrode for color picture tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6138381A JPS57176648A (en) 1981-04-24 1981-04-24 Shadow mask electrode for color picture tube

Publications (2)

Publication Number Publication Date
JPS57176648A true JPS57176648A (en) 1982-10-30
JPH0352172B2 JPH0352172B2 (en) 1991-08-09

Family

ID=13169590

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6138381A Granted JPS57176648A (en) 1981-04-24 1981-04-24 Shadow mask electrode for color picture tube

Country Status (1)

Country Link
JP (1) JPS57176648A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6160889A (en) * 1984-08-30 1986-03-28 Toshiba Corp Production of shadow mask
EP0924747A2 (en) * 1997-12-16 1999-06-23 Fuji Photo Film Co., Ltd. Flash discharge tube and method for producing the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971117A (en) * 1956-03-01 1961-02-07 Rca Corp Color-kinescopes, etc.
JPS5423554A (en) * 1977-07-22 1979-02-22 Fuji Photo Optical Co Ltd Image stabilizing optical device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971117A (en) * 1956-03-01 1961-02-07 Rca Corp Color-kinescopes, etc.
JPS5423554A (en) * 1977-07-22 1979-02-22 Fuji Photo Optical Co Ltd Image stabilizing optical device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6160889A (en) * 1984-08-30 1986-03-28 Toshiba Corp Production of shadow mask
JPH0530913B2 (en) * 1984-08-30 1993-05-11 Tokyo Shibaura Electric Co
EP0924747A2 (en) * 1997-12-16 1999-06-23 Fuji Photo Film Co., Ltd. Flash discharge tube and method for producing the same
EP0924747A3 (en) * 1997-12-16 2000-01-12 Fuji Photo Film Co., Ltd. Flash discharge tube and method for producing the same

Also Published As

Publication number Publication date
JPH0352172B2 (en) 1991-08-09

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