Apparatus for photolithographic exposure of cathode ray tube

Details Apparatus for photolithographic exposure of cathode ray tube Apparatus for photolithographic exposure of cathode ray tube

1995-10-31

1998-05-26

Braun, Fred L.

Photography

Exposing multicolor cathode-ray tube targets

Having light source or optical element which moves during...

G03B 4100

Patent

active

057582211

ABSTRACT:
An apparatus for exposing a color cathode ray tube includes a light source producing light for exposing parts of the color cathode ray tube during manufacture of the tube. A slit disposed near the light source permits adjustment of the size of an exposure pattern produced by light from the light source and passing through the slit. The light source is mounted on a support that is moved in each of two orthogonal directions. The support may be driven by a cam assembly. The apparatus produces a cathode ray tube including dots of phosphor producing particular colors in response to an incident electron beam, the dots having improved circularity and boundary definition. The apparatus can also be employed to produce a cathode ray tube with a linear stripe pattern by moving the light source in only one direction during the exposure process.

REFERENCES:
patent: 4256390 (1981-03-01), Fisher et al.
patent: 5221938 (1993-06-01), Kim

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