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New Type Thermal Printing Head Using Thin Film

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3 Author(s)
S. Shibata ; Oki Electric Industrial Company,Tokyo ; K. Murasugi ; K. Kaminishi

This paper describes the development of a new type thermal printing head. The main features of this paper are as follows. 1) The heating element is a Ta2N thin-film resistor coated with a SiO2-Ta2O5double layer. The SiO2layer prevents oxidation of Ta2N; the Ta2O5layer, which rubs directly against the heat-sensitive paper, is hard enough to resist abrasion. 2) A theoretical calculation revealed that the thermal time constant can be controlled by changing the thickness of the heat insulating layer. It was found that a glazed alumina ceramic substrate has the most suitable thermal properties. 3) A beam-lead diode array and a crossover structure have been developed to satisfy the electrical interface requirements of both the thermal printing head and the external logic.

Published in:

IEEE Transactions on Parts, Hybrids, and Packaging  (Volume:12 ,  Issue: 3 )