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Life Estimation of Thermal Print Heads Consisting-of Ta2N Thin-Film Resistors

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3 Author(s)
Tokunaga, Y. ; Nippon Telegraph & Telephone Public corp,Kanagawa, Japan ; Yoshida, M. ; Kizawa, M.

Life estimation of thermal print heads consisting of Ta2N thin-film resistors was investigated. Experiments on these thermal print heads included high temperature storage tests, pulse-heat tests, and actual thermal Printing tests under various conditions. From these experiments, four degradation modes, i.e., destruction, oxidation, crack formation, and abrasion modes, were identified. A flow chart was designed for the identification of the degradation modes. An Arrhenius plot was used to estimate the Ilfetime of the print head which degraded via the oxidation and/or the crack formation modes. In addition, a method to determine the head temperature while actually printing Was developed and degradation processes with aging were Observed.

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Components, Hybrids, and Manufacturing Technology, IEEE Transactions on  (Volume:4 ,  Issue: 1 )