How to distinguish the quality of
PCB circuit boards? In the face of the market all kinds of
PCB circuit board, circuit board or can distinguish PCB from two aspects; the first method is to judge from the appearance, the other is from the PCB itself matter
Quantity specification requirements to judge.
The way to judge the quality of
PCB circuit boards is:
The first is to distinguish the quality of printed circuit boards from appearance.
Generally speaking, the appearance of PCB circuit board can be analyzed and judged through three aspects.
Rule 1, standard size and thickness, the thickness of the standard circuit board circuit board are of different sizes, customers can check the measurement according to the thickness and specifications of their products.
2, the appearance of weld seam, the circuit board due to multiple parts, if welding is not good, the circuit board parts easy to fall off, seriously affect the quality of welding circuit board, good appearance, careful identification, strong interface is a very important point.
3, light and color, the external circuit board has ink coverage, the circuit board can play the role of insulation board, if the color is not bright, less ink, insulation board itself is not good.
Second: high quality PCB PCB needs to meet the following requirements.
1. When the components are installed, the telephone will be better used, that is, the electrical connection must meet the requirements.
2, high temperature copper peel is not easy to fall off.
3, line width, line thickness, line distance meet the requirements, so as to avoid heating, circuit breakage and short circuit.
4. There is no additional electromagnetic radiation.
5, the surface of copper is not easy to oxidize, affecting the installation speed. After oxidation, it will soon be broken.
6, high temperature, high humidity and special environment should also be considered.
7, the shape is not deformed, so as to avoid the deformation of the shell after installation, and the screw holes are misplaced. Now is a mechanical installation, circuit board hole and line design and deformation of the error should be within the allowable range.
8, the mechanical properties of the surface should meet the installation requirements.
With the rapid development of mobile phone, electronics, telecommunications and other industries, continue to grow and rapid growth at the same time also prompted the PCB circuit board industry quantity, people for the components of the number, weight, color, material, precision and reliability requirements more and moreHigh.However, due to the fierce competition in market prices, the cost of PCB board materials is also on the rising trend. More and more manufacturers monopolize the market at low prices in order to enhance their core competitiveness. However, behind these super low prices is to reduce material costs and jobs.The cost of process production is obtained, but the device is usually prone to cracks (cracks), scratches (or scratches), and its precision, performance and other comprehensive factors are not up to the standard, seriously affecting the solderability and reliability of products used in Dongguan Shihua, etc.Qiangjie PCB Co., Ltd. is an enterprise which mainly produces batch PCB, PCB prototype and fast PCB. It adopts advanced PCB production equipment in the 21st century and has high difficulty in manufacturing 1-16 layers. DHI. Buried / blind hole. High frequency. High TG.Thick copper. Aluminum substrate. Soft board and hard and soft combined multilayer board and other circuit board industrial capacity. Highly recognized and continuous Huaqiang to strength, integrity, product quality and service industry, and won the best supplier award comprehensive qualification.The above is how to distinguish the quality of the
PCB circuit board, when the purchase of PCB circuit board, must keep their eyes open.
