Causes of leakage of LED lamp beads
LED lamp beads leakage, many people have encountered. Some are found during production testing, and some are found when customers use them. The timing of the leakage also varies. Some are in the test after the LED lamp bead is packaged, some appear after being placed in the warehouse for a period of time, some appear after aging for a period of time, some appear after the customer has soldered, and some appear after the customer has used it for a period of time Appear.
The specific reasons for the leakage of LED lamp beads have always puzzled engineers in packaging factories. Many people think that the reasons for the leakage of LED lamp beads are nothing more than the following - static electricity damage, leakage of the chip itself, silver glue problems, wire bias welding, electrostatic breakdown leakage during transportation, improper debugging of the machine during packaging, or leakage of finished products after packaging. . Looking at the conclusions on the Internet, most people attribute the leakage of LED lamp beads to electrostatic damage. The solutions they propose are nothing more than emphasizing anti-static measures. This makes it difficult for packaging factories and users. Because even if they take good anti-static measures, the leakage phenomenon of LED lamp beads will still exist.
At present, the reasons for the leakage of light-emitting diodes may be the following points (in order of probability):
1. The chip is stained;
2. The silver glue is too high;
3. Wire bias welding;
4. Stress;
5. Improper use;
6. The chip itself leaks electricity;
7. Improper process makes the chip crack;
8. Static electricity.
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