公开(公告)号：US5635974A

公开(公告)日：1997-06-03

申请号：US587769

申请日：1995-12-21

申请人： Tsuyoshi Yasutomi ,  Kazuhiro Watanabe ,  Yoshiaki Kutsuzawa ,  Toshiaki Michihiro ,  Kennichi Gakuhari

发明人： Tsuyoshi Yasutomi ,  Kazuhiro Watanabe ,  Yoshiaki Kutsuzawa ,  Toshiaki Michihiro ,  Kennichi Gakuhari

IPC分类号： B41J2/335

CPC分类号： B41J2/3353 ,  B41J2/3355 ,  B41J2/3357

摘要： A thermal head comprising a resistance heating element and electrodes for feeding electric power to the resistance heating element formed on an insulating substrate, and a protective layer of filler-containing-glass formed so as to cover the resistance heating element and electrodes, wherein the specific gravity of the glass for forming the protective layer is equal to or higher than the specific gravity of the filler. In this manner, while maintaining the smoothness and enhancing the ear resistance of the protective layer surface, the thermal expansion coefficient of the protective layer is decrease to reduce the thermal stress due to pulse heat generation from the resistance heating element, and moreover the thermal conductivity of the protective layer is enhanced, so that a favorable recorded image is obtained for a long period.

摘要翻译： 一种热敏头，包括电阻加热元件和用于向形成在绝缘基板上的电阻加热元件供电的电极和形成为覆盖电阻加热元件和电极的含填料玻璃的保护层，其中特定 用于形成保护层的玻璃的重力等于或高于填料的比重。 以这种方式，保持层表面的平滑性和提高耳部电阻的同时，保护层的热膨胀系数降低，从电阻加热元件产生的脉冲发热引起的热应力降低，而且热导率 增加了保护层，使得长时间获得良好的记录图像。