Process for producing thermal printing heads

Details Process for producing thermal printing heads Process for producing thermal printing heads

B - Operations, Transporting

41

C

26/200, 117/66

B41C 1/05 (2006.01) B41C 1/055 (2006.01) B41J 2/335 (2006.01) H01C 17/06 (2006.01)

Patent

CA 2023796

ABSTRACT OF THE DISCLOSURE A thermal printing head having a ridge-shaped glaze structure. First and second glass pastes form the ridge-shaped glaze structure. The second glass paste has a higher softening temperature than that of the first glass paste. The first glass paste is printed on a substrate in a pattern having a plurality of adjacent parallel slit-shaped openings. The second glass paste is printed in a pattern of independent bands covering the openings. After these steps, the first and second glass pastes are melted and hardened simultaneously by heat treatment to form the ridge-shaped glaze structure. A plurality of isolated individual resistors are formed linearly across the crest of the ridge-shaped glaze structure and then a plurality of isolated individual conductive traces which connect at one end to each of the resistors are formed. Lastly, the product is divided into a plurality of thermal printing heads having a ridge-shaped glaze structure.

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