The LED chip is a solid semiconductor device, which is a P-N junction. The timing of the leakage of the lea lamp bead is different. Some are inherently defective in the chip before packaging, leading to leakage. Some are lamp bead seals
The lamp beads leak electricity after installation. Some of the lamp beads are electrically charged after the lamp beads are aging, and some are leaking after the lamp beads are used. The cause of leakage should be analyzed in detail to find out the source of the problem. Prescribe the right medicine. The reasons for the leakage of the leo lamp T bead are summarized as follows.
1. There are defects in the wafer itself, leading to leakage. This may be the case when the chip is taken back from the chip manufacturer. Therefore, it is necessary to choose a regular and qualified chip manufacturer
⒉The chip has been contaminated. This is a frequent problem and the most common problem. Why is the chip contaminated? The reason may be that the chip is not paid attention when using it, so that the chip is stained with dust or moisture. The led chip is a very small thing. If you don't pay attention to it, the structure of the lamp bead will be damaged, causing the lamp bead to leak or die. Therefore, this requires our workshop to use a dust-free workshop. Wear anti-static gloves when taking chips. Operators are not allowed to make makeup, and hair should be coiled up during work. A series of requirements.
3.: When the lamp bead wire is thin. The wire is not well welded, causing the lamp beads to leak electricity. For example, the wire is offset. Welding. Improper setting of the wire tension will cause the lamp beads to leak. This problem is also relatively common. As long as you pay more attention to it, you can avoid such problems.
4. The bottom glue is too high and too thick to cause leakage. I won't talk about this much, it is a matter of common sense.
5. Improper process, causing chip cracking, etc., for example. The lamp bead is on the wire foot, and the pressure of the magnetic nozzle is too large due to the improper operation of the wire bonding machine, which causes the chip to be damaged, and the chip is cracked.
6. Static electricity causes lamp beads to leak electricity. Static electricity is usually caused by friction. This is also the reason for relatively easy leakage. Therefore, when we produce lamp beads, we should require employees to wear electrostatic clothes and electrostatic caps to minimize the occurrence of static electricity.
