How to distinguish the pros and cons of PCB circuit boards

How to distinguish the pros and cons of PCB circuit boards2020-08-04 17:03:00 With the increasing demand for PCB circuit boards in the mobile phone, electronics, and communication industries, there are more and more PCB supply and demand phenomena on the market, but because of the price The market competition is fierce, and the cost of PCB board raw materials is also in a trend of continuous increase. More and more manufacturers are in order to improve their competitive advantage and completely monopolize the market with low prices. Its essence is to reduce the cost of raw materials and manufacturing process costs to achieve the goal. Such PCB circuit boards are generally very prone to cracks (gaps), scratches, (or scratches), and comprehensive elements such as precision and characteristics are still not available. Qualified, the more serious ones will directly harm the performance of the product. How to distinguish the pros and cons of PCBs among these various and dazzling PCBs? This is worth discussing. There are two ways to distinguish the advantages and disadvantages of PCB circuit boards: 1. Identify the advantages and disadvantages of circuit boards from the appearance. Under normal circumstances, the appearance of PCB circuit boards can be specifically analyzed based on three levels. 1. Standards for size and thickness. PCB circuit boards are not the same size as the thickness of standard circuit boards. Customers can accurately measure and check the thickness and specifications of their own products. 2. Light and tone. The external circuit boards are covered by printing ink, and the PCB circuit board can have the function of an insulating layer. If the color of the board is not bright and there is less ink, the heat insulation board itself is not good. 3. Welding appearance. PCB circuit boards have many parts. If electric welding is not good enough, the PCB circuit boards whose parts are easy to fall will seriously harm the welding quality of the circuit boards. The appearance is good, and the page strength is very important. 2. The high-quality PCB circuit board must meet the following requirements 1. The telephone is required to be easy to use after the components are installed, that is, the electrical connection must meet the requirements; 2. The line width, line thickness, and line distance of the line meet the requirements to prevent the line from heating, Open circuit and short circuit; 3. The copper skin is not easy to fall off under high temperature; 4. The copper surface is not easy to oxidize, which affects the installation speed, and it will be broken soon after oxidation; 5. There is no additional electromagnetic radiation; 6. The shape is not deformed, so as to avoid The housing is deformed after installation, and the screw holes are misaligned. Now it is all mechanized installation, the hole position of the circuit board and the deformation error of the circuit and the design should be within the allowable range; 7. High temperature, high humidity and special environment resistance should also be considered in the range; 8. Surface mechanics The performance should meet the installation requirements. The above is how to distinguish the advantages and disadvantages of PCB, have you learned it?