PROCESS FOR PRODUCING THERMAL PRINTING HEADS

摘要

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.