| 摘要 |
<p>PURPOSE:To obtain the title resistor having excellent moistureproof characteristics and suitable for mass production, by a method wherein an electrode is printed and sintered on a dividable insulating substrate, a coating material having thermistor characteristics is printed and sintered, and a protective film is printed and hardened. CONSTITUTION:A pair of rear electrodes 11 and 12 are printed on every unit piece 1b which is divided for every chip substrate 1 on the rear surface of a substrate 1a, and besides, electrodes 2 and 3 are printed on every unit piece 1b on the surface of the substrate 1a, an extended part 4 is formed on the electrode 2, and the front and back sides of the substrate are sintered simultaneously. Then, a resistance film 5 is formed by printing and sintering the coating material having thermistor characteristics on the region ranging from the surface of each unit piece 1b to the upper surface of the extended part 4 of the electrode 2. Then, an electrode 6 is printed and sintered on the resistance film 5 located on the electrode 2 from above the electrode 3 for every unit piece 1b. Then, the electrode 6 is cut off on the resistance film 5, and the value of resistance is adjusted by the position of cut grooves 7. Subsequently, a heat resisting resin protective film 8 is formed by printing in such a manner that the electrode 6 is coated a striding the electrodes 2 and 3. Then, each unit piece 1b is divided, and a rectangular split body 1c is obtained. Subsequently, edge face electrodes 11 and 12, which are continuously formed in width direction of the split body 1c, are formed and the electrode 2 and the rear electrode 11, and the electrode 3 and the rear electrode 12 are connected respectively. Then, the rectangular split body 1c is divided, and a chip substrate 1 is obtained.</p> |
