Faceplate for an electrostatic printing tube and method of makin

Details Faceplate for an electrostatic printing tube and method of makin Faceplate for an electrostatic printing tube and method of makin

1978-09-08

1981-08-04

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Signal translating output electrode

29 2515, H01J 918, H01J 3102

Patent

active

042824567

ABSTRACT:
A method for making a faceplate for an electrostatic printing tube involves the positioning of the faceplate at an angle with respect to a collimated light source so that the pins embedded within the faceplate act as a mask to provide shadowed areas which prevent positive photoresist on a transparent conductive coating adhered to a surface of the faceplate from being exposed to light. The photoresist exposed to light is removed and the conductive coating is etched except where the nonexposed photoresist is located thereby forming elongated conductive pads electrically connected to respective pins. The nonexposed photoresist is removed and the conductive pads are plated with a suitable secondary electron emissive material.

REFERENCES:
patent: 2963606 (1960-12-01), Crews et al.
patent: 3157811 (1964-11-01), Stone, Jr.
patent: 3230601 (1966-01-01), Wurtz
patent: 3321657 (1967-05-01), Granitsas et al.
patent: 3366817 (1968-01-01), Miller
patent: 4106937 (1978-08-01), McTeague et al.

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