Sony Corporation

Koki Inada

Norihiro Tateyama

Hiroshi Itoh

Tadashi Asazuma

Hideaki Takazawa

Osamu Dobashi

A method for fabricating a cathode ray tube is described. The method comprises the steps of selectively forming a resist layer corresponding to a pattern of a fluorescent material on an inner surface of the panel of a cathode ray tube, and applying a slurry of a light-absorbing material on the entire inner surface of the panel including the resist layer to form a light-absorbing layer. An inorganic pigment slurry is applied over the entire inner surface of the panel to form an inorganic pigment layer on the light-absorbing layer and then subjected to reverse development to selectively remove the resist layer along with the light-absorbing layer and the white pigment layer, thereby forming a matrix pattern. Finally, a fluorescent material is applied to individual removed portions of the matrix pattern to form a fluorescent pattern. Monochromatic or color cathode ray tubes are obtained with an improved luminance and a colorimetric purity by a simple procedure.

Method for fabricating a cathode ray tube

In a method of manufacturing a color cathode ray tube utilizing an external surface exposure process, a fluorescent slurry to be applied to a panel contains a photosensitive resin composition composed of an aqueous emulsion of polyvinyl compound resin containing a saponified polyvinyl acetate with an addition-condensed photosensitive group as a protective colloid and an aqueous solution of a saponified polyvinyl acetate with an addition-condensed photosensitive group. Accordingly, a resistance of a fluorescent layer formed on the panel against an aqueous solution of hydrogen peroxide is improved, and an anti-fogging performance of the fluorescent layer is also improved.

Method of manufacturing color cathode ray tube

A method for forming a phosphor pattern on a panel of a cathode ray tube to prevent the peeling of a black matrix from the glass panel when treated with an inversion solvent which involves forming a protective film of a transparent photosensitive material on a glass panel on which a black matrix is formed and using the so-called outer surface exposure method to produce a color cathode ray tube having high definition.

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Chiba, Japan

Koki Inada