| 摘要 |
PURPOSE:To manufacture a thermal printing head having cheap price, high reliability and high picture quality by constituting an electric conduction body connected to a heat generation section electrically of two layers of different material, and a boundary of a tip section and a side section adjucent to a boundary of a heat generation section of a secondary electric conduction body formed on a primary electric conduction body is disposed inside of a boundary of the tip section and the side section of the primary electric conduction body. CONSTITUTION:A heat generation section consists of a plurality of a heat generation resistance body 2 is disposed on a ceramic substrate. A lead section consists of a primary electric conduction body layer 3 and a secondary electric conduction layer 4 is connected to the both ends of this heat generation resistance body 2 electrically. A tip section 401 of the secondary electric conduction body layer 4 formed on the primary electric conduction body layer 3 is inside of a tip section boundray 301 of the primary electric conduction body layer 3. And a side boundary 402 of the secondary electric conduction body layer 4 is also inside of a side boundary 302 of the primary electri conduction body layer. The uniformly of the breadth of the heat generation resistance body 2 is promoted, a resistance value of the heat generation resistance body 2 is made uniform and a printing quality is improved. |
