When we get a PCB circuit board, how do we preliminarily judge its quality? Here, the editor of Ucreate printed circuit board company will share a few details with you. Although these details do not 100% prove that the quality of the PCB circuit board must be good, if a circuit board manufacturer can control these details in place, it is enough to show that they The emphasis on quality and the rigorous quality management!

1. Look at the ink on the PCB circuit board

A good circuit board manufacturer will definitely choose a big brand of ink. At the same time, they are more concerned about the process and baking of the printing ink, so that the gloss of the ink will be better. At the same time, many circuit board manufacturers who have quality requirements attach great importance to the selection of colors. Good-quality PCB circuit boards must have arelatively thick ink thickness. According to IPC standards, the ink needs to reach 20um, but we can not actually measure this thickness, but it can be seen with the naked eye.

2. Look at the silkscreen text on the PCB circuit board

At this point, we mainly look at the clarity and three-dimensional effect of silk screen printing. Especially for some silk screens with small fonts, high-quality PCB circuit board silk screens are very clear, and even under a magnifying glass, the rough edges of the writing are still invisible.

3. Look at the pad treatment of the PCB circuit board

If it is a HASL circuit board, we need to see if the HASL is flat, especially if the position of the IC feet is neat. If it is an immersion gold circuit board, we will see whether the color of the gold surface is bright, whether it is dark yellow or light yellow. The yellower the gold surface, the better the immersion gold process is, because it is related to the process of nickel plating and the thickness of gold.

4. Check whether the BGA pad is full and round

When a good circuit board manufacturer deals with BGA, firstly, the engineers wil be very careful when optimizing the pads. Secondly, the BGA pads made by good equipment and experienced workers are very good in exposure alignment.