| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a substrate for a thermal head, the substrate which has high partially convexed protrusions, and also has small undulations in their convexed top surfaces and slopes, by etching while removing a solid reaction product produced in a glass etching so as to improve a decrease of an etching speed and an unevenness of etching. SOLUTION: Provided are: a method for etching a glaze substrate, which enables application of a deep and even etching at one time by etching while applying an ultrasonic wave to an etching liquid and removing a reaction product by the cavitation; and a method for manufacturing a partially convexed protrusion type glazed substrate by using the etching method. The ultrasonic wave is preferably of an intermittent oscillation. COPYRIGHT: (C)2010,JPO&INPIT
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