How to visually distinguish the stand or fall of circuit board

Printed circuit board design based on the graph is based on circuit principle, realize the function of the circuit designer need. The design of the printed circuit board mainly refers to the layout design, need to consider the layout of the external connections. Optimize the layout of the internal electronic components. Metal wire and hole layout optimization. Electromagnetic protection. Various factors such as heat dissipation. Good landscape design can save production costs and achieve good circuit performance and heat dissipation performance. Simple layout design can be implemented by hand and complex layout design needs with the aid of computer aided design. But because the market price competition is intense, PCB material cost is rising trend, more and more manufacturers in order to enhance the core competitiveness, to monopolize a market at a low price. Behind these very low prices, however, is to reduce material cost and the cost of the production process to achieve, but the device is usually prone to cracks, Cracks) , easy to scratch, ( Or scratch) Comprehensive factors such as, its precision, the performance is not standard, the serious influence to use in the weldability and reliability of the products and so on. In the face of a variety of PCB circuit boards on the market, can distinguish PCB circuit board is good or bad from two aspects: one way is to judge from appearance to points; On the other hand is judged from the PCB itself quality specification requirements. How to visually distinguish the stand or fall of circuit board in the general case, PCB circuit boards look through three aspects to analyze: size and thickness of the standard rules of circuit board of the size of the standard the thickness of the circuit board is different, the customer can be measured to check according to the thickness of the products and specifications. Light and color external circuit board PCB processing, there is ink coverage, circuit board can have the effect of insulation, if the board of the color is not bright, less ink, insulation board itself is not good. Weld appearance of circuit board processing because of the parts is more, if welding is not good, parts easy to fall off the circuit board, seriously affect the welding quality of circuit board, good appearance, identify carefully, it is very important to interface a little bit stronger.