• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1355308. Luminescent screens RCA CORPORATION 28 June 1972 [28 June 1971] 30260/72 Heading H1D In the manufacture of a black matrix colour television screen wherein hardened dots are formed on the screen in positions where phosphor dots are subsequently to be deposited, the whole screen then being coated with lightabsorbing material and the dots with their overlying coating removed to leave the required matrix, the dots are formed by exposing a photo-resist through apertures in a shadow mask and the exposure is limited to make them smaller than the apertures. The thickness of the photo-resist is important and may be controlled within the range 0À1 to 0À3 mg/cm<SP>2</SP> by adjusting the viscosity within the range 9-30 centipoises at 25‹ C.; the best viscosity is 11-12 cps when maximum size reduction is required, but greater viscosity may be used if the screen is subjected to flood exposure before, during, or after the exposure through the shadow mask. The light source should be smaller than usual and may have an effective diameter of 60-130 mils, preferably 80 mils. The required reduction in diameter of the dots may vary over the screen area, e.g. from 1 mil. at the centre to 3 mils. at the corners, and this may be achieved by providing in the lighthouse used for the exposure process a filter which reduces the light intensity towards the edges.
    公开号:SU898961A3
    申请号:SU721799554
    申请日:1972-06-21
    公开日:1982-01-15
    发明作者:Эдит Эллен Маяуд；Самуэль Пирлам
    申请人:РКА Корпорейшн；
    IPC主号:
    专利说明:

    The invention relates to methods for applying cathode ray tube (CRT) screens with a negative tolerance matrix used in known television receivers, 5
    Known methods for applying CRT screens in which a light-absorbing matrix is used. For a screen with a matrix with positive tolerance, the diameter of the electron spot is chosen to be larger than the matrix slot [1].
    However, this method is difficult to implement in an industrial environment. Therefore, it is preferable to first apply the matrix and use a shadow CRT mask as a photomask.
    Closest to the proposed technical essence is the method of reverse printing. This method 20 consists in covering the surface of the screen with a film of polymeric materials, the solubility of which varies with the level of light exposure to the light source, exposing 25 films through the holes of the mask, removing unexposed portions of the film with a solvent, applying polyvinyl alcohol and then G21 phosphor coating.
    When sections of the polymer film are removed, a light-absorbing matrix is formed with many nests, each of which has the same shape but larger dimensions than the mask openings through which exposure was performed. To obtain a screen with a matrix with a negative tolerance, it is necessary to increase the holes in the mask after the stages of photoprocesses are completed.
    In practice, at first the mask is made with holes of a smaller size, and then, after applying the phosphor coating, it is etched to increase the holes to a given size. It is possible to use adjacent masks and other similar techniques. The described process allows to obtain a high-quality 898961 screen with a matrix with a negative tolerance.
    However, this process is difficult to control the quality of the screens.
    The aim of the invention is to simplify the quality control of screens in the manufacturing process.
    This goal is achieved by the fact that according to the photographic method of applying screen structures on CRT screens, including coating, the screen surface with a film of photosensitive polymer materials, exposing the film through the holes of the mask, removing unscreened portions of the film with a solvent, applying polyvinyl alcohol and then a luminescent coating, a film of polymeric materials is applied by weight to a value of 0.1-0.3 mg / cm, and the film is exposed with an underexposure with sensitivity to printing not more than 1.5 and the equivalent diameter of the light source. 1,53,3 mm.
    A feature of the proposed is that the polymer film is subjected to underexposure, in contrast to normal exposure or overexposure. In essence, the average tank from ki decreases.
    exposure time during exposure. As a result, weakening of the print becomes possible, i.e., obtaining sections of the photolayer that are identical in form, but smaller in size than the holes of the mask used in the exposure. Thus, the need to expand the holes or other changes in the mask after the stages of photoprocesses is eliminated.
    The choice of the upper limit of the sensitivity to printing is due to the fact that for large quantities the product is edged and spotted. It is advisable to choose the smallest achievable values, defined as the ratio of the transparency of the matrix to the level of light flux (exposure level10
    IS 1 4 tion). The range of the most optimal diameters of the light sources is determined by the fact that at smaller sizes the print is too small, the exposure time is long, and diffraction phenomena occur. Beyond the upper limit of the range, a noticeable heterogeneity of the coating appears. The obtained optimal range for the quantitative deposition of a polymer film is associated with a compromise solution for obtaining optimal adhesive and resistive characteristics of the coating.
    Using the proposed invention allows more precise control of technological processes in the manufacture of CRT screens and, therefore, their quality, which leads to an increase in the yield of products.
    权利要求:
    Claims (1)
    [1]
    Claim
    A photographic method for applying screen structures to cathode ray tube screens, including coating the surface of the screen with a film of photosensitive polymer materials, exposing the film through the holes of the mask, removing unexposed portions of the film with a solvent, applying polyvinyl alcohol, which, by virtue of laziness, fishing is applied by weight up to the value О, ΙΟ, 3 mg / cm ^, and the film is exposed with a lack of exposure when the sensitivity to printing is not more than 1.5 and the equivalent diameter of the light source is 1.5, 3.3 m .
    and then luminescent covering with the aim of simplifying control of the screens in the process of their fabrication from polymer materials ΓΛ
    类似技术:
    公开号 | 公开日 | 专利标题
    SU898961A3|1982-01-15|Photographic method of producing screen structures on crtscreens
    US3025161A|1962-03-13|Method of forming patterns
    DE2303630C3|1982-07-08|A method of photographic printing of the screen of a black matrix color picture tube
    US4251610A|1981-02-17|Method of making multicolor CRT display screen with minimal phosphor contamination
    US3481733A|1969-12-02|Method of forming a cathodo-luminescent screen
    US3226246A|1965-12-28|Method of manufacturing display screens for cathode-ray tubes
    US3653900A|1972-04-04|Selective etching process for changing shadow-mask aperture size
    US3005125A|1961-10-17|Display screen
    US3406068A|1968-10-15|Photographic methods of making electron-sensitive mosaic screens
    US3834905A|1974-09-10|Method of making elliptically or rectangularly graded photoprinting masters
    DE2014090A1|1970-10-08|Process for the production of apertured diaphragms for color television tubes
    US3726678A|1973-04-10|Method of screening a color picture tube
    DE2428252C3|1979-07-26|Process for photographic printing of a black matrix
    US3653901A|1972-04-04|Color kinescope production with a temporary mask
    GB1388883A|1975-03-26|Apparatus and method and manufacturing colour picture tubes
    US3685994A|1972-08-22|Photographic method for printing a screen structure for a cathode-ray tube
    EP0146226B1|1990-02-28|Methods of and apparatus for applying stripe-patterned fluorescent films to screen portions of colour cathode ray tubes
    US4223083A|1980-09-16|Virtual mask exposure system for CRT screen manufacture
    US2873189A|1959-02-10|Cathode ray tube screen process
    US3224895A|1965-12-21|Method of manufacturing display screens for cathode-ray tubes
    US4013467A|1977-03-22|Method of manufacturing color picture tubes using rotating light attenuator
    US3736137A|1973-05-29|Aperture mask for,and method of screening,a color cathode-ray tube
    US2932570A|1960-04-12|Image reproduction device screen
    US3931442A|1976-01-06|Temporary modification of a pattern mask for use in forming a color CRT screen and a process for modifying the same
    US3753663A|1973-08-21|Blank for shadow mask for color television picture tube
    同族专利:
    公开号 | 公开日
    DE2231473C3|1980-01-31|
    KR780000504B1|1978-10-25|
    FR2143756A1|1973-02-09|
    DE2231473B2|1975-10-16|
    NL7208839A|1973-01-02|
    NL179322B|1986-03-17|
    FR2143756B1|1977-07-22|
    JPS51421B1|1976-01-08|
    CA966347A|1975-04-22|
    IT955339B|1973-09-29|
    BE785499A|1972-10-16|
    DE2231473A1|1973-01-18|
    GB1355308A|1974-06-05|
    NL179322C|1986-08-18|
    US3788846A|1974-01-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS5137138B2|1972-01-26|1976-10-14|
    US4086090A|1973-07-25|1978-04-25|Hitachi, Ltd.|Formation of pattern using acrylamide-diacetoneacrylamide copolymer|
    DE2411869C3|1974-03-12|1982-07-08|Standard Elektrik Lorenz Ag, 7000 Stuttgart|Photochemical system for coating the fluorescent screen of color television tubes|
    US3993516A|1974-10-07|1976-11-23|Zenith Radio Corporation|Method of controlled etching in the manufacture of a color selection mask for a color cathode ray tube|
    US3955980A|1974-11-04|1976-05-11|Zenith Radio Corporation|Method for making a color selection mask for a color cathode ray tube|
    US3998638A|1975-05-22|1976-12-21|Westinghouse Electric Corporation|Method of developing opaquely coated sensitized matrix with a solution containing sodium meta-silicate|
    US4087280A|1977-03-17|1978-05-02|Corning Glass Works|Method for enhancing the image contrast in color television picture tubes|
    US4376158A|1977-05-09|1983-03-08|Keuffel & Esser Company|Color-proofing method|
    US4150990A|1978-01-10|1979-04-24|Gte Sylvania Incorporated|Small phosphor area black matrix fabricating process|
    US4165396A|1978-06-19|1979-08-21|Rca Corporation|Method for salvaging the light-absorbing matrix and support of a luminescent screen|
    US4234669A|1979-03-27|1980-11-18|Rca Corporation|CRT Screen structure produced by photographic method|
    US4408851A|1982-05-19|1983-10-11|Rca Corporation|Photographic method for printing a viewing-screen structure using a light-transmission filter|
    FR2547950B1|1983-06-24|1986-01-31|Videocolor Sa|METHOD FOR MANUFACTURING LOW REFLECTANCE COLOR TELEVISION TUBE OF THE SCREEN FOR AMBIENT LIGHT AND TUBE OBTAINED THEREBY|
    US4517224A|1983-08-18|1985-05-14|Rca Corporation|Method for removing a phosphor layer from a support surface|
    JPH0618103B2|1983-10-31|1994-03-09|ソニー株式会社|Method for producing fluorescent surface of cathode ray tube|
    JPS6166334A|1984-09-06|1986-04-05|Sony Corp|Manufacture of cathode-ray tube and photosensitive phosphor paste|
    DE3539572C2|1985-11-08|1993-09-02|Licentia Patent-Verwaltungs-Gmbh, 60596 Frankfurt, De|
    US4746588A|1985-11-25|1988-05-24|Rca Corporation|Method for preparing a photosensitive film on a glass surface|
    US4778738A|1986-08-14|1988-10-18|RCA Licensing|Method for producing a luminescent viewing screen in a focus mask cathode-ray tube|
    US4990417A|1987-02-23|1991-02-05|Sony Corporation|Method of manufacturing a cathode ray tube|
    WO2006088804A1|2005-02-16|2006-08-24|3M Innovative Properties Company|Method of making morphologically patterned coatings|
    JP2008531248A|2005-02-16|2008-08-14|スリーエムイノベイティブプロパティズカンパニー|Method for producing topographically patterned coatings|
    CN105551912A|2015-12-21|2016-05-04|陈艳|Internal coating technology for helical energy-saving lamp tube|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US15750271A| true| 1971-06-28|1971-06-28|
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