Rohm Co., Ltd.

Hiroaki Ohnishi

Toshihiko Takakura

Toshiyuki Fujita

A slope is provided from a heater area to the side of the edge of a substrate near the heater area. A resistance film layer and a common electrode are provided on the slope which is formed as a convexly curved surface. In the slope, a reinforcement conductor along the common electrode is embedded below the resistance film layer.

Corner head type thermal head and manufacturing method therefor

Method of manufacturing a corner head type thermal head

A method of making thermal printheads is provided which comprises the steps of: (a) preparing a master substrate having plural rows of unit head regions; (b) forming a head glaze member in each unit head region in each row so that an edge of the head glaze member of the unit head region aligned with that of the head glaze member of any other unit region in the same row; (c) half-cutting the master substrate along the edge of the head glaze member of the unit head region with a half-cutting dicing blade which has an inclined edge face for partially cutting the head glaze member to provide a glaze corner; and (d) forming an array of heating dots along the glaze corner; wherein at least one blade positioning mark is formed on the master substrate before the half-cutting step (c); and the half-cutting dicing blade is positionally set in the half-cutting step (c) by referring to the blade positioning mark.

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Kyoto, Japan

Hiroaki Ohnishi