How to see the size of the chip capacitor? Because of the size characteristics of the chip capacitance, it is impossible to set up a clear identification method, even if it is available to the naked eye. The best way is to use a multimeter for measurement. Let's take a look at the measurement methods and reasons.
Multimeter measurement:
1. The black pen is connected to com, and the red pen is connected to the top right;
2. Connect the gear to the gear of measured capacitance;
3. Connect the multimeter probe to both ends and test it;
Unidentified reason:
Many chip capacitors can't be labeled because of their limited volume, so they are generally marked on the whole plate when the chip is produced. If it is a single chip capacitor, use a capacitance tester to measure its capacity. If it is the same factory logo, generally speaking, the capacity of dark color is larger than that of light color, brown gray > light purple > gray white. Of course, the best way is to blow it down with a hot-air gun, and use the capacitance block or capacitance meter of the digital meter to measure after it cools down.
It is said that this is because the production process of capacitors is different from that of resistors. Resistors can be printed without cutting (such full page printing is certainly cheaper and easier to do). Capacitors are ceramic materials, which can be sintered at high temperature. The inner electrode is silver palladium. But now nickel is used. Silver and palladium are too expensive. Because the capacitor is first cut and then fired at a high temperature of thousands of degrees, it needs to be electroplated on the electroplating line.
Finally, the specific capacity can be known by testing and sorting. The capacity can not be determined after the test, sometimes it is necessary to back burn (burning end) and reverse plating, and then re sorting. To determine the final capacity. Therefore, there is no suitable printing time for capacitor production process. Obviously, the design capacity of the capacitor will not be consistent with the final capacitance. A batch of capacitors can be divided into many types of capacity segments. The reason why there are too many uncertain factors in the production process is that there are too many uncertain factors in the production process.
After the production of chip capacitors, the capacitance value is determined and printed. According to the current technology, it can be solved, but more production process is needed.
