| 摘要 |
PURPOSE:To make it possible to sufficiently enhance printing quality even if mechanical processing accuracy is not sufficient, by forming a heat generating resistor pattern at a connection end part into a shape different from that of the other heat generating resistor pattern so as to reduce a pattern interval. CONSTITUTION:Corresponding wiring patterns 3 are respectively provided to half substrates 1, 2 each having a size capable of forming heat generating resistors in the number 1/2 the total number of heat generating resistors necessary for a thermal head and heat generating resistors 4 are formed between said patterns 3. In this case, the heat generating resistor 6 formed at the position nearest to the connection part 5 of each substrate is formed so that the lateral width thereof about 1.5 times the width of each heat generating resistor 4 by expanding one edge thereof toward the connection end 5 and the edge of the expanded end coincides with the edge of the connection part 5 and, thereafter, the end surface of the connection part 5 is ground to chamfer the upper edge corner part by about 10mum and both substrates are integrally mounted on one heat sink by an adhesive while the center shift of the heat generating resistors 4, 6 on both substrates and the mounting step of the half substrates 1, 2 onto the heat sink are controlled. |
