As high speed development of mobile phones, electronics, communication industry etc.,which prompte the rapid growth of PCB circuit board industry, at the same time people demand is much higher for layer number of components, material, color, weight, precision, reliability and so on.
However, due to the fierce market price competition,PCB material cost is on the rise,in order to improve their core competitiveness more and more manufacturers are trying to monopolize the market at low prices. To meet these very low prices, is reducing material cost and production process cost. but the device is usually prone to crack, easy to be scratched or abrasion, the comprehensive factors such as precision, performance can not reach the standard,seriously influence the weldability and reliability of pcb products, and so on.
Face to various PCB circuit boards on the market, it is possible to distinguish PCBs from two aspects. One is to judge from the appearance, and the other is to judge from quality specification of PCB itself.
Judge the quality of PCB circuit boards:
First: In general distinguish if PCB good or bad from its appearance, can be analyzed by three aspects.
1. Standard rules for size and thickness.
Customer can measure the PCB thickness and specification,and compare them with his request.
2. Light and color.
PCB surface is covered with ink,so that the board can be insulated, if board color is not bright, less ink, the PCB board itself is not good.
3. Soldering appearance.
Due to there are many componets in one PCBA, if welding is not good, components are easy to fall off from PCB board, seriously affect the PCBA soldering quality, so good appearance is very important.
Second: good quality PCB board meet following requirements
1. The line width, line thickness and line spacing should meet the requirements, which can avoid to emit heat,open circuit and short-circuit;
2. The copper foil is not easy to fall off under high tempreture;
3. The copper surface is not easy to be oxidized, which affects the installation speed.It will break down soon after oxidation, .
4. No additional electromagnetic radiation;
5. The shape is not deformed to avoid housing deformation and screw hole dislocation. Currently it is all mechanized installation, PCB hole position and design deformation tolerance should be within the allowable range;
6. When PCB is installed with components, the PCBA should be in good condition, that is, the electrical connection should meet the requirements;
7. High temperature, high humidity and special environment should also be considered.
8. Surface mechanical properties should meet the installation requirements;
The above is the method to judge PCB circuit board good or bad, shenzhen Aibixing PCB manufacturer remind everybody here, when buying PCB, please do not only consider the price, but also pay more attention to the soldering and durability.Compare prices, services, manufacturers' qualifications,and customer evaluation, etc.to do judgement, and select PCB manufacturers with strength, qualification certificated, and quality guarantee.
Shenzhen Aibixing Industrial Co.,LTD. produce small, medium batch PCB and prototype PCB, using advanced production equipment,can make 1-16 layers difficult DHI,Buried/blinded hole,high frequency,high TG,thick copper,aluminum base PCB,flexible PCB and rigid-flex multilayer board and other circuit board. Welcome your contact sincerely.