Dongguan QiMao Electronics Co., Ltd.

Electromagnetic compatibility refers to the ability of electronic equipment to work harmoniously and effectively in various electromagnetic environments. The purpose is to make the electronic equipment not only suppress various external interference, make the electronic equipment work normally in a specific electromagnetic environment, but also reduce the electromagnetic interference of the electronic equipment itself to other electronic equipment.

For electronic devices, a certain amount of heat will be generated during operation, so that the internal temperature of the device will rise rapidly. If the heat is not dissipated in time, the device will continue to heat up, and the device will fail due to overheating. Performance will drop. Therefore, it is very important to have a good heat dissipation treatment of the circuit board. Next, I will explain to you about the heat dissipation method of the PCB circuit board.

Since the birth of LED, the problem of heat dissipation has always been a major problem for manufacturers. If the junction temperature of the LED exceeds 85 degrees, it will lead to chip failure, phosphor oxidation, and light decay. The heat dissipation performance directly affects the life of the LED lamp. The aluminum substrate has the characteristics of high thermal conductivity, low thermal resistance, withstand voltage, light weight, and anti-oxidation.

Flying probe testers do not rely on pin patterns mounted on a fixture or bracket. Based on this system, two or more probes are mounted on tiny heads that can move freely in the x-y plane, and the test points are directly controlled by CADI Gerber data. The dual probes can be moved within 4 mils of each other. The probes can move independently, and there is no real limit to how close they are to each other.

The copper thickness is 4.5OZ aluminum substrate, and the following difficulties will be encountered in manufacturing:1. Line width compensation for engineering design: Due to the thickness of copper, the line width must be compensated for, otherwise the line width after etching is too poor, and the customer will not accept it, and the line width compensation value must be accumulated.

The appearance of the gold-plated layer is golden yellow and has high chemical stability. It is only soluble in aqua regia and other super acids, and insoluble in other acids. The atomic valences of gold are one and three. The standard potential φ°Au+/Au of monovalent gold is +1.68V, and the standard potential φ°Au3+/Au of trivalent gold is +1.50V. For steel, copper, silver and its alloy substrates