| 摘要 |
<p>PURPOSE:To obtain a thick film circuit board having the optimum resistance value, when a resistor which has electrode at both ends is formed on the insulating board, by providing a plurality of resistance regulation conductors which can be peeled off in the directions of the width and the length of the resistor along the electrodes, and connecting the conductors with conductive paste as required. CONSTITUTION:An insulating board 11 is formed of a ceramic material such as alumina. A resistor 12 is formed on the board 11 by printing and baking of ruthenium-oxide based resistor paste. Electrodes 13 are formed at both end parts of the resistor 12 by using copper paste. The electrodes are connected to wiring bodies 15. In this constitution, a plurality of copper conductor pieces 14 are deposited on the insides of the facing electrodes 13 with intervals being provided so that the conductor pieces can be peeled off. Under this state, at first the characteristics of the circuits are measured. Function trimming parts 17 are cut in, and the coarse adjustment of the resistance value is performed. In order to perform fine adjustment, the specified conductor pieces 14 are connected in the longitudinal or lateral direction with pattern conductors 16 made of conductive paste. Thus the optimum resistance value is obtained.</p> |
