| 摘要 |
A low-inductance cylindrical resistor formed of a cylindrical ceramic substrate, which is coated with a film of resistive material and overprinted with intermeshing comb termination films. End caps are mounted over the substrate ends for connection to the termination films, and the entire assembly is coated with an environmentally-protective coating. A groove is formed in the substrate in a direction parallel to the substrate axis, the groove increasing the resistance of the resistor by an amount which causes the resistance to be at the desired value, within a very small range. Because such groove is longitudinal to the substrate, it creates no substantial weakening effect relative thereto. In accordance with the method, the above-stated groove is formed by a blast of abrasive particles, the duration of the blast and the direction of relative movement being such that the resistance value is easily and accurately trimmed without weakening the substrate substantially.
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