| 摘要 |
PURPOSE:To attain prolongation of the life of a thermal head by enabling the suppression of the flaw such as the pinhole of glass coating and the lamination of the glass layer, by adhering molten glass to a base material by current supply heating and forming a heat generating element on the formed glass layer. CONSTITUTION:A thermal head is constituted of a round rod 1 made of copper or molybdenum, the glass glaze layer 3 formed to the periphery of said rod 1 in a thickness of 10-100mum, the heat generating elements 5 further formed on said glaze layer 3 and individual electrodes 7 and lead electrodes 9 supplying a current to said heat generating elements 5. The glass glaze layer 3 is formed by adhering molten glass to the round rod 1 by current supply heating in a dip furnace. Because glass is heated by the current flowing through the dip furnace, heat is generated especially on the surface contacted with molten glass. Therefore, molten glass can be certainly wetted within a short time and a thin dense glass film from pinholes and having a constant thickness is strongly adhered to the round rod 1. Therefore, an inexpensive thermal head reduced in flaw and having long life can be provided.
|
