PCBA Tech - How to do reliability test on PCBA board

How to do reliability test on PCBA board
In SMT chip processing, if any material problems occur, the quality of the PCBA board will be affected. So how to do it? This requires us to have strong material testing capabilities, supplier management capabilities, technical analysis capabilities, and reliability testing capabilities.

According to past experience, reliability testing is often overlooked by PCBA processing manufacturers. They believe that as long as the PCBA board is tested without problems, it will be accepted by the end customer. As everyone knows, many PCBA boards have fatal defects such as short service life and instability in terminal products. This is also the result of the PCBA factorynot doing strict reliability tests. Let's take a look at how to do reliability testing on the shared PCBA board

How to do reliability test on PCBA board

How to carry out the reliability test of PCBA board?

one. Ageing

Place the PCBA board with OK test function under specific temperature and humidity conditions, perform repeated power on and off, simulation function operation, load operation, etc., and check the stability of the PCBA board through 24 to 72 hours of continuous work. Because the aging test takes a long time, it does not have the possibility of large-scale batch operation. In the actual process, the aging test is only a sample test, and the overall yield rate of this batch of products is judged by the qualified rate of the random test.

two. Vibration test

When many PCBA boards are delivered to customers, there are often some problems caused by vibration during transportation, such as component shedding and pad cracks. Through the vibration test, the vibration effect during transportation can be effectively simulated in the laboratory, and the hidden dangers in the welding process are gradually exposed. In this way, batch welding defects are avoided to the greatest extent, and the overall yield rate of delivery is improved. At present, there are professional analog motion vibration workbenches on the market, and the price is not high, you can purchase one for 5,000 yuan.

three. Surge test

In the process of PCBA processing, it is often OK to work under normal voltage, but occasional defects in a certain surge. Many circuit designs are not perfect. They often fail to consider the fatal impact of instantaneous voltage or current impact on the entire circuit. This requires us to conduct sampling surge impact experiments before the mass production of PCBA.

Four. Packaging test

This test is often overlooked by everyone, resulting in a very funny problem: We spent a lot of energy to make the PCBA board perfect, but we lost in the last link of packaging and transportation. The factory shall simulate the packaging form of the PCBA board for proper drop test.

The above is the PCBA board reliability test shared by the editor. The editor wants to remind you that the reliability experiment of the PCBA board is not just the ones we mentioned above. Each PCBA factory can discuss with customers according to the actual situation. The situation determines the detailed reliability test plan together, the purpose is to make the product have higher quality.