Abstract: By adjusting the exposure dosages for the three primary color phosphors in the photolithographic process used to produce color CRTs for color television, standard whites of desired color temperatures are obtained. The aperture mask used in the photolithographic process is then discarded, and the CRT is operated as a monochrome tube in a standard receiver. Stable, rugged and portable color references are thus produced.

Abstract: A method for manufacturing a color cathode ray tube, and in particular, for conditioning the surface of a panel of a color cathode ray tube to prepare it for the application of a pattern of color phosphors while minimizing the effects of reflections from interfaces in the panel.

Abstract: A method for constructing a color cathode ray tube wherein a light source is placed at a number of positions and exposures are made and a film on the inside surface of the panel is exposed to form prescribed stripe width patterns using the transmission light intensity distribution which are superposed plural Fresnel diffraction waveforms and wherein correction lens system is selected which correspond to the exposure of various light source positions and have different values and the absolute value of the transmission light intensity distribution and the derivative .differential.I/.differential.x of the transmission light intensity distribution at positions corresponding to the edge of the stripe width pattern are optimized throughout the inside surface of the panel.

Abstract: A method of screening a tensed mask CRT faceplate to correct for color purity errors resulting from screening of the tube through a tension mask whose supporting frame is distorted by the tensile forces exerted by the mask on the frame. The method includes heating the tensed mask during photoscreening of the tube to a temperature sufficient to substantially reduce the strain imparted to the support frame.

Abstract: A fluorescent screen of a color picture tube is manufactured by the steps of forming a film of substance which becomes sticky when exposed to light on an inner surface of a panel of the tube, exposing predetermined portion of the film through a shadow mask to render sticky the exposed portions, repeatedly applying powders of phosphors of respective colors onto the portions which became sticky so as to form phosphor picture elements of respective colors, exposing portions of the film other than the predetermined portions to render them sticky, and applying a powder of graphite to the portions other than the predetermined portions to form a black matrix film.

Abstract: The present invention is to positively provide a light pen pick-up phosphor pattern by the application of an inverting method and the selection of its slurry composition. That is, this invention relates to a method for producing a phosphor screen of a cathode ray tube which comprises the steps of forming a photo-sensitive material layer with a predetermined pattern on the inner surface of a cathode ray tube panel, coating on the whole surface of the panel including the photo-sensitive material layer with a phosphor slurry for use in light pen pick-up and removing the photo-sensitive material layer to thereby form a light pen pick-up phosphor pattern which is an inverted pattern of the former pattern.

Abstract: Disclosed herein is a method of producing a phosphor screen of color picture tube wherein a light absorbing material is applied onto the inner surface of a panel, a shadow mask is provided, the surface of film of the light absorbing material is scanned and irradiated with a laser beam via the shadow mask so that portions of the light absorbing material irradiated with the laser beam are heated and burned, thereby to form a black matrix. According to this method, the number of steps for forming the black matrix is decreased, and the quality and yield of the phosphor screen are increased.

Abstract: A method is shown in which a black, light-absorbing matrix is formed on the viewing surface of a rear-projection polymethyl methacrylate TV viewing screen in which there is use of a negative working photoresist composition comprising an aqueous solution of polyvinyl alcohol, a water-soluble dichromate and acetone as essentially the sole wetting agent.

Abstract: A positive-working photoresist composition is described comprising a solution of polyvinyl alcohol, an inorganic ferric salt, ammonium trioxalatoferrate and a diol such as 1,4-butanediol. There is also described the addition of a finely divided black pigment to such a composition and the use of such a black pigmented composition for the formation of a light-absorbing matrix in a color CRT screen structure.

Abstract: A fluorescent screen of a black matrix type color picture tube is manufactured by forming a graphite film on an inner surface of a face plate, applying a photoresist film on the graphite film, exposing to light portions of the photoresist film where phosphor picture elements are to be formed subsequently, removing the exposed portions of the photoresist film to expose portions of the graphite film, removing the exposed portions of the graphite film to form a black matrix film having voids corresponding to the exposed portions of the graphite film, and thereafter depositing triads of phosphors of picture elements on the inner surface of the face plate through the voids. In a modification, a reflective film is interposed between the graphite film and the photoresist film and portions of the reflective film in register with portions of the photoresist film exposed to light are removed by etching.

Abstract: Image display including a viewing screen comprising spaced elemental image areas and a light-absorbing matrix of crystalline zinc-iron sulfide particles adjacent to these areas. The display may be made by producing a layer which is tacky in substantially the pattern of the desired matrix, and then contacting crystalline zinc-iron sulfide particles with the tacky pattern, whereby particles adhere to the tacky pattern, thereby producing the desired matrix.

Abstract: A positive-working photoresist composition is described comprising a solution of polyvinyl alcohol, an inorganic ferric salt, ammonium trioxalatoferrate and a diol such as 1,4-butanediol. There is also described the addition of a finely divided black pigment to such a composition and the use of such a black pigmented composition for the formation of a light-absorbing matrix in a color CRT screen structure.

Abstract: A water-soluble, positive-working photoresist composition is disclosed which comprises water-soluble aromatic diazonium salt, water-soluble phenolic compound, and water-soluble polymeric compound. When the film of this composition is irradiated with a pattern of actinic ray and then brought into contact with an alkaline gas or solution, the coating of unexposed areas hardens to become water-insoluble. Preferably, when the film is brought into contact with a suspension of powder or dry powder after being hardened, a positive pattern of powder is obtained by the development with water.

Abstract: In order to deposit an antireflection layer between the phosphor strips of the screen of a color television tube and on the face-plate flange, a photosensitive substance is applied on the internal face of the face-plate and is then exposed to radiation-hardening at the phosphor-strip locations, whereupon the non-hardened portions are removed. The flange and face-plate are then coated with the antireflection layer, H.sub.2 O.sub.2 is deposited in order to destroy the hardened strips which are finally removed together with their antireflection coating. Deionized water, for ensuring that the film of hardened photosensitive material which has formed on the flange is made uniform, is spray-deposited on the flange prior to deposition of photosensitive substance. After deposition of the antireflection layer, deionized water is also sprayed onto this layer prior to application of the oxygenated water. The destructive activity of the oxygenated water on the film is thus reduced.

Abstract: A method for forming a pattern of a non-light-emitting black material on the inner surface of a faceplate of a color cathode ray tube is provided, which comprises the steps of:forming a photoresist layer of a photoresist containing a water-soluble bisazidocompound, a water-soluble diazocompound, and a water-soluble polymeric material, on an inner surface of a faceplate of a color cathode ray tube;selectively exposing parts of the photoresist layer using a shadow mask so as to photocure the exposed parts;developing the photoresist layer to remove unexposed parts of the photoresist layer, thereby forming dots of the photoresist;forming a film of a non-light-emitting black material on the inner surface of the faceplate including the dots; andremoving the dots and the non-light-emitting black material on the dots so as to form holes in the film of the non-light-emitting black material.

Abstract: A method of making a colour display screen for a television display tube is disclosed. On the window portion of the tube an electron-absorbing layer is provided which is scanned by means of an electron beam via the shadow mask. The charge image on the layer is then developed xerographically. The layer is preferably photoconductive so as to be able to remove the charge remaining after the development by means of a uniform exposure.

Abstract: In forming a fluorescent screen of a black matrix type color picture tube, a light absorptive film is first formed on the inner surface of a face plate of the color picture tube. Formed on the light absorptive film is a light-hardenable photosensitive resin film which in turn is exposed to light through a shadow mask at portions corresponding to phosphor applying portions. The unexposed portion of the light-hardenable photosensitive film is then developed. Finally, the exposed portion of the light-hardenable photosensitive film and portion of the light absorptive film therebeneath are removed to partly perforate the light absorptive film so that in the light absorptive film, openings are formed into which the phosphor is applied.

Abstract: For improving the contrast of information displayed on the screen, there is placed in front of this latter a filter comprising a matrix of channels pierced in a photosensitive glass plate. The pierced plate is covered over the whole of its surface with a blackened deposit so as to reduce to the maximum its coefficient of reflection. Thus filters can be formed readily on request, according to the direction of observation in particular, with a good coefficient of transmission and improved contrast.

Abstract: The invention provides a multi-step photo-process for disposing a definitive band of opaque conductive material on the sidewall portion of a CRT face panel. The process provides coating the panel with a photosensitive material and discretely exposing the viewing area and terminal region of the sidewall to polymerize the material thereon. The intermediate unexposed coating is removed, and at least the sidewall portion, coated with an opaque conductive material. The polymerized coatings are degraded and removed, leaving a precisely defined band of opaque conductive material on the panel sidewall, and making electrical contact with the aperture mask supporting studs embedded therein.

Abstract: Disclosed are a photosensitive composition comprising a copolymer comprising acrylamide, diacetone-acrylamide and a sulfonated vinyl monomer, such as sodium p-styrenesulfonate, and a water-soluble aromatic bisazide compound, and a pattern-forming method using this photosensitive composition.This photosensitive composition has a reciprocity law failure, and when this photosensitive composition is used, the development after light exposure is completed in a short time.

Abstract: In a method of forming a fluorescent screen of a color picture tube by a dry process, the method comprises a first step of precoating an emulsion containing a powder of acryl resin on an inner surface of a face plate of the color picture tube to form a primary coating, a second step of coating on the primary coating a photosensitive composition consisting essentially of a diazonium salt to form a thin film, a third step of exposing to light a selected portion of the thin film to render the same to become adhesive, a fourth step of depositing a powder of a phosphor on the selected portion to form a phosphor layer of a first color and a fifth step of repeating the third and fourth steps to form phosphor layers of second and third colors.

Abstract: In forming a fluorescent screen for a color picture tube having triads of phosphor materials of the three primary colors arranged in a predetermined pattern on the inner surface of a panel, a photosensitive film which exhibits stickiness when exposed to a threshold amount of light is formed on the inner surface of the panel. Locations of the photosensitive film where the three color phosphor materials respectively occupy are exposed to light from a light source through a shadow mask mounted to the panel. The amount of exposure light for a first color phosphor material is the threshold or above and that for second and third phosphor materials is below the threshold. After completion of the light exposures for the first to third color phosphor materials through the shadow mask, the shadow mask is dismounted from the panel and the first color phosphor material is deposited onto the photosensitive film.

Abstract: The photosensitive resin which exhibits stickiness by photo-reaction is added with a binder which does not substantially raise dark reaction, and a resultant mixture is applied onto the inner surface of face panel of the color picture tube to form a film. Portion of the film where powdery material is going to be applied is exposed to light and rendered sticky. Phosphor powder, when used as the powdery material, is applied to the sticky portion and adhered thereto to form a fluorescent screen.

Abstract: A photosensitive image forming material which comprises a photosensitive resin composition layer on a base and an image forming layer composed of a mixture of a metal and a sulfide between said base and said photosensitive resin composition layer.

Abstract: A patternwise coated powder layer can be formed by a process comprising the steps of coating a photosensitive composition, which contains an aromatic diazonium salt as a photosensitive component and becomes sticky by exposure, onto the surface of a substrate to form a thin layer, subjecting the thin layer to patternwise exposure with actinic radiation to produce stickiness at the exposed area, and then contacting powder particles with the thin layer after exposure to make the thin layer to accept the powder particles according to the powder acceptability of the thin layer. According to this process, for example, the phosphor screen of a color picture tube can simply be produced.LIST OF PRIOR ART (37 CFR 1.56 (a))The following reference is cited to show the state of the art:Japanese Patent Laid-Open Publication No.

Abstract: A tube of the shadow mask type having a line screen and a slit aperture mask wherein the slits are arranged in columns and the slits in each column are separated by web portions of the mask is improved by the addition to the screen of light absorbing material in patches located only in alignment with the webs.

Abstract: A method for the manufacture of multi-colored microlithographic displays especially fluorescent screens for cathode ray tubes is provided in which a film of a positive phototackifiable polyacetylene sulfone polymer is applied to the substrate of the display. The film is then exposed in predetermined areas with a sufficient amount of radiation to tackify the exposed areas. The exposed areas are then contacted with a pigment or phosphor which is desired to be applied to the exposed area and it selectively adheres to the exposed areas. The exposure and dusting are repeated for each application of different color pigments, toners or phosphors.

Abstract: A method for the manufacture of multi-colored microlithographic displays especially fluorescent screens for cathode ray tubes is provided in which a film of an olefin sulfone polymer is applied to the substrate of the display. The film is then exposed in predetermined areas with a sufficient amount of radiation to depolymerize and lower the melting point of the polymer in the exposed areas. The film is then heated to a temperature above the softening point of the exposed polymer but below the softening point of unexposed polymer and contacted with the pigment or phosphor which is desired to be applied which selectively adheres to the exposed areas. The exposure and dusting are repeated for each application of different color pigments, toners or phosphors.

Abstract: A photosensitive film applied onto the inner surface of a faceplate of color picture tube is exposed to light through a shadow mask. The exposed portions of the photosensitive film are further hardened by the photo-cross linking property until they exhibit hydrophobic property. Since these further hardened portions repel a light absorbing material, for example graphite, the graphite adheres to only the portions of the faceplate between the exposed portions. The surplus light absorbing material deposited on the further hardened portions is removed by development, whereby a black matrix surface can be obtained having a pattern of the light absorbing material adhered to the faceplate.

Abstract: Additions of fluorescein or a fluorescein salt and a diol to a photosensitized polymeric material increase the photosensitivity thereof in a method for photodepositing a luminescent-screen structure for a cathode-ray tube.

Abstract: An improved method of forming a multicolor cathode-ray tube display screen to minimize phosphor contamination. A light-absorbing matrix is first formed on the inner surface of a CRT faceplate, preferably by photoetching of a substantially black metallic layer. Then, multiple color dot patterns are deposited in the matrix openings by (a) depositing a layer of positive photoresist on the matrix and any previously-deposited dot pattern; (b) exposing the resist through a shadow mask to light from a point source positioned to simulate an electron gun; (c) developing the resist to form an integral mask containing a pattern of holes aligned with the matrix openings for one color phosphor; (d) coating the developed resist layer with a photohardenable phosphor slurry; (e) exposing the slurry coating through the faceplate to light from a diffuse source; (f) developing the slurry to remove the unexposed portions, leaving a pattern of dots of one color; and (g) stripping away the photoresist masking layer.

Abstract: A method of making a display screen for a color television display tube in which a photoconductive layer on the window portion of the tube is provided with a uniform charge which may be either positive or negative. A charge pattern is then formed on that layer by scanning it with an electron beam passing through an apertured color selection electrode. The energy of the beam is such that the average depth of penetration of the electrons is greater than the thickness of the photoconductive layer so that the charge disappears at the regions struck by the beam. The remaining charge pattern is developed with a suspension of charged phosphor particles. By repeating this process, patterns of red, green and blue luminescent phosphor particles can be successively provided to form the display screen. It is also possible to scan the layer simultaneously or successively by three electron beams and to develop the resultant charge pattern with a light-absorbing pigment.

Abstract: A slurry comprised of particulated glass-forming substances, with or without particulated relatively clear or light-colored metal oxides, dispersed in a photolacquer is applied as a uniform layer on a surface of a color image screen. Such layer is then developed via conventional photoforming techniques to produce sites or windows for phosphor dots and the resultant window-containing layer is heated, prior or subsequent to application of phosphor dots in such windows, at a temperature in the range of about 350.degree. to 500.degree. C. In instances where metal oxide particles are present in the slurry, the resultant layer becomes opaque or dark upon tempering and in cases where only pure glass-forming substance particles are in the slurry, the resultant layer becomes opaque or dark upon tempering in a reducing atmosphere. Electrical conductivity may be imparted to the light-absorbing coating by addition of selective conductive materials to the initial slurry.

Abstract: A method for preparing a screen structure for a cathode-ray tube comprising(a) exposing a water-soluble photopolymeric film on a surface to a light image to insolubilize selected portions of the film,(b) flushing the exposed film with an aqueous medium that is free from borate ions to remove only the still-soluble portions of the film, thereby producing a stencil on the surface,(c) rinsing the stencil with an aqueous solution containing borate ions to prevent further removal of material from said stencil,(d) then overcoating the stencil and the surface not covered by the stencil with pigment particles,(e) and then removing only the stencil and the overcoating thereon.

Abstract: Photocrosslinkable, organic solvent-soluble polymers having a Tg greater than 200.degree. C. are disclosed. The polymers contain sufficient radiation-sensitive crosslinkable units to render the polymers insoluble in organic solvents on exposure to radiation to which the crosslinkable units are sensitive. Also disclosed are supports, particularly supports having a radiation-sensitive surface, having thereon a layer of the described photocrosslinkable polymers. The polymers are capable of receiving heat-transferable dyes and are useful in forming color filter arrays for solid-state imaging devices. A particularly convenient method of forming solid-state color imaging devices having a layer containing an array of color filters is also disclosed.