| 摘要 |
<p>PURPOSE:To slightly vary the resistance value of a thin film resistor and to accurately trim it in a short time by trimming it from the end which is the nearest to an electrode wiring layer of a trimming land in a direction of obliquely cutting the land. CONSTITUTION:A thin film resistor 1 having a trimming land 11 and an electrode wiring layer 2 adhered to the part of the resistor 1 are provided, an the resistor 1 is trimmed from the end which is the nearest to the layer 2 of the land 11 in a direction of obliquely cutting the land 11. For example, a voltage applied to both the ends of the original resistor 1 is measured while continuously supplying a constant current from a constant-current source 3 to the resistor 1. Then, the land 11 of the resistor 1 is cut by a laser beam. In this case, the resistor 1 is cut from the end which is the nearest to the layer 2 of the land 11 in a direction of the cutting oblique to the direction of a current. When the read of a voltmeter becomes a value to be obtained, the trimming is finished.</p> |
