JPS5482969A - Light absorbing film trimming device for color braun tube - Google Patents

Light absorbing film trimming device for color braun tube

Info

Publication number
JPS5482969A
JPS5482969A JP15085577A JP15085577A JPS5482969A JP S5482969 A JPS5482969 A JP S5482969A JP 15085577 A JP15085577 A JP 15085577A JP 15085577 A JP15085577 A JP 15085577A JP S5482969 A JPS5482969 A JP S5482969A
Authority
JP
Japan
Prior art keywords
film
latent image
light absorbing
trimming
absorbing film
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.)
Pending
Application number
JP15085577A
Other languages
Japanese (ja)
Inventor
Yasuo Iwasaki
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15085577A priority Critical patent/JPS5482969A/en
Publication of JPS5482969A publication Critical patent/JPS5482969A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To secure an easy trimming of the light absorbing film with no use of the NH4F solution, and thus to eliminate the defect on the fluorescent screen caused by the trimming solution.
CONSTITUTION: Photo resist 12 is coated on the inner surface of valve 1, and the latent image is formed by the ultraviolet rays given from radiation part 9a and 10a of light diffuser 9 and 10 in device 5. Panel 1 turns around the center axle to obtain the latent image of a fixed shape on the entire circumference of skirt 1b and seal surface 1c. Then shadow mask 13 is mounted to form the latent image on film 12 on the inner surface of face plate 1a via light control filter 15, correcting lens 16 and mask 13 respectively. Then the hot water is sprayed to remove the film except for the latent image part, and hardened film 17 is obtained. Then graphite suspension 18 is coated and dried. After this the exfoliation solution is injected to lift off film 17, thus forming light absorbing film 2 with which the trimming is over on the surface of panel 1.
COPYRIGHT: (C)1979,JPO&Japio
JP15085577A 1977-12-14 1977-12-14 Light absorbing film trimming device for color braun tube Pending JPS5482969A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15085577A JPS5482969A (en) 1977-12-14 1977-12-14 Light absorbing film trimming device for color braun tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15085577A JPS5482969A (en) 1977-12-14 1977-12-14 Light absorbing film trimming device for color braun tube

Publications (1)

Publication Number Publication Date
JPS5482969A true JPS5482969A (en) 1979-07-02

Family

ID=15505835

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15085577A Pending JPS5482969A (en) 1977-12-14 1977-12-14 Light absorbing film trimming device for color braun tube

Country Status (1)

Country Link
JP (1) JPS5482969A (en)

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