| 摘要 |
A thermal printhead (A 1 ) includes a plurality of main heat-producing resistor sections ( 31 ) formed on a substrate ( 1 ) and arranged at predetermined intervals in a primary scanning direction (X), a plurality of auxiliary heat-producing resistor sections ( 32 ) each of which is spaced from a respective one of the main heat-producing resistor sections ( 31 ) by a predetermined distance in a secondary scanning direction (Y), a plurality of first electrodes ( 43 ) each connecting, in series, at least one of the main heat-producing resistor sections ( 31 ) and the corresponding auxiliary heat-producing resistor section ( 32 ) which are arranged in the secondary scanning direction (Y), and a plurality of second electrodes ( 41 ), ( 42 ) for energizing the series circuits of the main heat-producing resistor sections ( 31 ) and the auxiliary heat-producing resistor sections ( 32 ) connected in series by the first electrodes ( 43 ). The distance (D 2 ) between each of the main heat-producing resistor sections ( 31 ) and a corresponding one of the auxiliary heat-producing resistor sections ( 32 ) in the secondary scanning direction (Y) is larger than the length (L 1 ) of the main heat-producing resistor section ( 31 ) in the secondary scanning direction (Y).
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