Reverse-printing method for producing...

Details Reverse-printing method for producing... Reverse-printing method for producing...

B - Operations, Transporting

05

D

96/230, 96/247

B05D 3/06 (2006.01) G03F 7/04 (2006.01) H01J 9/227 (2006.01)

Patent

CA 1070546

REVERSE-PRINTING METHOD FOR PRODUCING CATHODE-RAY-TUBE-SCREEN STRUCTURE ABSTRACT OF THE DISCLOSURE In the method disclosed, a supporting surface, such as the inner surface of the faceplate of the tube, is coated with a photosensitive polymeric film containing about 5 to 80 weight percent of at least one member of the group consisting of certain diol ethers and diol alkanes. Then the film is exposed to a light image to produce regions of greater solu- bility and regions of lesser solubility. The film regions of greater solubility are removed, and then the entire faceplate with its regions of less solubility is overcoated with a layer containing particles of screen structure material. The retained film regions and the overcoating thereon are removed leaving the screen structure adherent in the areas of greater solubility. By including a diol ether or diol alkane in the film, the exposure time may be shortened significantly with- out substantial loss of adherence.. - 1 -

249855

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