| 摘要 |
PROBLEM TO BE SOLVED: To grind to remove a step on a surface of a protection layer of a thermal head. SOLUTION: In this thermal head 10 having a partial glaze layer 13A, a step due to a thickness of an electrode is formed on the surface of the protection layer covering a heating element array. A platen roller 1 is provided such that the shaft thereof can be moved by a piezoelectric actuator. The platen roller 1 presses a lapping sheet 8 against the surface of the protection layer. The platen roller 1 moves in a direction parallel to a conveyance direction of the lapping sheet 8 and the step is ground to be removed. The moving speed of the platen roller 1 is lowered at a portion where the amount in grinding is large and the moving speed thereof is raised at a portion where the amount in grinding is small. COPYRIGHT: (C)2003,JPO
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