PCB News - How to distinguish the quality of the circuit board

How to distinguish the quality of the circuit board

With the rapid development of the mobile phone, electronics, and communications industries, it has also promoted the continuous growth and rapid growth of the PCB circuit board industry. Customers are concerned about the number of layers, weight, precision, materials, colors, and reliability of PCB factory components. Increasingly demanding.

However, due to the fierce market price competition, the cost of PCB board materials 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.

Faced with the various PCB circuit boards on the market, there are two ways to distinguish the quality of PCB circuit boards; the first method is to judge from the appearance, and the other is to judge from the quality specification requirements of the printed circuit board itself.

How to judge the quality of PCB circuit board:

First: distinguish 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;

1. 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.

2. light and color.

The external circuit boards are covered with ink, and the circuit board can play an insulating role. If the color of the board is not bright and the ink is less, the insulation board itself is not good.

3. The appearance of the weld.

The circuit board has many parts. If the soldering is not good, the parts are easy to fall off the circuit board, which will seriously affect the soldering quality of the circuit board. The appearance is good. It is very important to identify carefully and have a stronger interface.

Second: High-quality PCB circuit boards need to meet the following requirements

1. The phone 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, breaking, and short-circuiting;

3, the copper skin is not easy to fall off under high temperature;

4, no additional electromagnetic radiation;

5, the mechanical properties of the surface must meet the installation requirements;

6. The copper surface is not easy to oxidize, which affects the installation speed, and it will be broken soon after being oxidized;

7, and high temperature, high humidity and special environment resistance should also be considered;

8. The shape is not deformed, so as to avoid deformation of the shell 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;

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