Registration transfer process for the manufacture of cathode...

Details Registration transfer process for the manufacture of cathode... Registration transfer process for the manufacture of cathode...

H - Electricity

01

J

316/11

H01J 9/227 (2006.01)

Patent

CA 1326260

ABSTRACT A process is disclosed for use in the manu- facture of a color cathode ray tube having a rectangular flat faceplate. The process comprises positioning the faceplate in a predetermined x-y plane by referencing faceplate a-b-c reference areas on two adjacent edges or sides of the faceplate with complementary a-b-c reference points on a faceplate locating fixture; the fixture also has three spaced six-point precision index- ing means. With the faceplate a-b-c reference areas and the faceplate locating fixture a-b-c points mutually referenced, six-point precision indexing means are at- tached to the faceplate in registration with the precision indexing means on the faceplate locating fixture. Using the precision indexing means attached to the faceplate, a shadow mask is registered with the faceplate through the use of complementary precision indexing means to pro- vide a faceplate shadow mask assembly in mutual precise registry. Using the registered faceplate-shadow mask assembly, a pattern of phosphors is photodeposited on the faceplate by photoexposure means. The registry of the pattern of phosphors and the shadow mask is accomplished according to the invention with a precision made pos- sible by the use of the six-point precision indexing means, and the location of the patterns on the faceplate is made possible by the use of the a-b-c referencing of the faceplate and the faceplate locating fixture.

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