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With the rapid development of the mobile phone, electronics, and communication industries, it also promotes the continuous growth and rapid growth of the PCB circuit board industry. People have more and more requirements for the number of layers, weight, precision, materials, colors, and reliability of components. Come higher.
However, due to fierce market price competition, the cost of PCB boardaterials is also on a rising trend, and more and more manufacturers are monopolizing the market with low prices in order to enhance their core competitiveness. However, behind these ultra-low prices are obtained by reducing material costs and process manufacturing costs, but devices are usually prone to cracks (cracks), scratches, (or scratches), and their precision, performance and other comprehensive factors have not reached the standard., Which seriously affects the solderability and reliability of the product.
Facing the various PCB circuit boards on the market, distinguishing the quality of PCB circuit boards can start from two aspects:
The first method is to judge from the appearance;
On the other hand, it is judged from the quality specification requirements of the PCB board itself.
How to judge the quality of PCB circuit board
one
Identify the quality of the circuit board from the appearance
Under normal circumstances, the appearance of the PCB circuit board can be analyzed and judged through three aspects
Standard rules for size and thickness
The thickness of the circuit board is different from that of the standard circuit board. Customers can measure and check the thickness and specifications of their own products.
Light and color
The external circuit board is covered with ink, and the circuit board can play the role of insulation. If the color of the board is not bright and there is less ink, the insulation board itself is not good.
Outside the weld
The circuit board has many parts. If the welding is not good, the parts are easy to fall off the circuit board, which will seriously affect the welding qualit welding quality of the circuit board. The appearance is good. It is very important to identify carefully and have a stronger interface.
two
High-quality PCB circuit boards need to meet the following requirements
The telephone is required to be easy to use after the components are installed, that is, the electrical connection must meet the requirements;
The line width, line thickness, and line distance of the line meet the requirements to prevent the line from heating, breaking, and short-circuiting;
The copper skin is not easy to fall off under high temperature;
The copper surface is not easy to oxidize, which affects the installation speed, and it will be broken soon after being oxidized;
No additional electromagnetic radiation;
The shape is not deformed, so as to avoid deformation of the housing and dislocation of the screw holes after installation. Now they are all mechanized installations, the hole position of the circuit board and the deformation error of the circuit and the design should be within the allowable range;
High temperature, high humidity and resistance to special environments should also be considered;
The mechanical properties of the surface must meet the installation requirements; the above is the method for judging the quality of the PCB circuit board.
