PURPOSE: To enable to drive a thermal head for a prolonged period of time, by a method wherein a heating resistor is made from a Cr-Si alloy containing 65W 85% of Si and the balance of Cr, and an electric wiring conductor connected to the layer is provided with a double-layer construction of an Al layer and a Cr layer.
CONSTITUTION: A heating resistor layer 2 consisting of a film of the Cr-Si alloy produced by vacuum evaporation or the like is laminated on a high-resistance substrate, for example, a glazed ceramic substrate 1 to constitute a heating resistor 4. Further, an electric wiring conductor 3 for supplying power to the resistor 4 is laminated on the resistor 4. The conductor 3 is a good electrical conductor having the double-layer construction of the Cr layer and the Al layer, and is formed in a pattern by photoetching. Further, a protective layer 5 for the resistor 4 is formed, for example, by using SiO2 or Ta2O5.
MITANI MASAO
TSUNODA TOYOJI
KAWAHITO MICHIYOSHI
KAMEI TSUNEAKI
| JPS5637177A | 1981-04-10 | |||
| JPS5352997A | 1978-05-13 |