Dongguan QiMao Electronics Co., Ltd.

According to the number of layers, circuit boards are divided into three major categories: single panel, double panel, and multilayer circuit board.The first is the single panel. On the most basic PCB, the parts are concentrated on one side, and the wires are concentrated on the other side.

Circuit board repair is an emerging repair industry. The degree of automation of industrial equipment is getting higher and higher, so the number of industrial control boards in various industries is also increasing. Hundreds of thousands of yuan) has also become a very headache for enterprises. In fact, most of these damaged circuit boards can be repaired in China, and the cost is only 20%-30% of the purchase of a new board, and the time used is much shorter than the time spent abroad. The following introduces the basics of circuit board repair.

According to its technological characteristics, there are two kinds of gold plating: non-cyanide gold plating and cyanide gold plating. Cyanide bath is divided into high cyanide and low cyanide bath. Cyanide-free plating solution is mostly used in sulfite gold plating solution.

Silicone circuit board three-proof paint has excellent waterproof, moisture-proof, dust-proof, anti-corrosion, anti-aging and other characteristics, and is widely used in the insulation protection of circuit boards and electronic components. Simple operation, can be brushed or dipped.

The circuit layer (generally using electrolytic copper foil) is etched to form a printed circuit for assembly and connection of devices. Compared with the traditional FR-4, with the same thickness and the same line width, the aluminum substrate can carry higher current.

The use of chemical solvents is the most common method to remove the protective film of conformal paint, and its key lies in the chemical properties of the protective film to be removed and the chemical properties of the specific solvent. In most cases, the solvent does not dissolve the protective film, but rather swells it; once the protective film swells, it can be easily scraped or wiped off with a light touch.