1. Standard rules for size and thickness

The thickness of a circuit board differs from that of a standard circuit board, and customers can measure and inspect it based on their own product thickness and specifications.

2. Light and Color

The external circuit boards are covered with ink, and the circuit board can serve as insulation. If the color of the board is not bright and there is less ink, the insulation board itself is not good.

3. Weld appearance

Due to the large number of parts on the circuit board, if the welding is not good, the parts are prone to fall off, which seriously affects the welding quality of the circuit board. It is important to carefully identify the appearance of the circuit board and have a strong interface.