| (19) |
 |
|
(11) |
EP 0 862 199 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
31.03.1999 Bulletin 1999/13 |
| (43) |
Date of publication A2: |
|
02.09.1998 Bulletin 1998/36 |
| (22) |
Date of filing: 27.02.1998 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
28.02.1997 JP 46320/97
20.02.1998 JP 39345/98
|
| (71) |
Applicant: KABUSHIKI KAISHA TOSHIBA |
|
Kawasaki-shi,
Kanagawa-ken 210 (JP) |
|
| (72) |
Inventor: |
|
- Iida, Keisuke,
Kabushiki Kaisha Toshiba
Kawasaki-shi,
Kanagawa-ken (JP)
|
| (74) |
Representative: Henkel, Feiler, Hänzel |
|
Möhlstrasse 37
81675 München
81675 München (DE) |
|
| |
|
| (54) |
Color cathode ray tube and fabrication method of fluorescent surface thereof |
(57) A color cathode ray tube is disclosed, that comprises an optical filter layer 2 formed
on an inner surface of a glass panel 1, a thin film formed on a front surface of the
optical filter layer 2 and composed of a metal oxide, and a fluorescent substance
layer 4 formed on the thin film 3 corresponding to a pattern of the optical filter
layer 2. The surface state of the thin film 3 is rougher than the surface state of
the optical filter layer 2 and similar to the surface state of the fluorescent substance
layer 4. Thus, the optical filter layer 2 sparsely contacts the fluorescent substance
layer 4. Thus, the influence of the optical filter layer 2 to the fluorescent substance
layer 4 can be reduced. Consequently, fluorescent substance particles of the fluorescent
substance layer 4 can be suppressed from breaking, dropping, and so forth. Thus, an
excellent fluorescent surface can be obtained at high throughput.