With the popularity of electronic products, PCB board as the basis of electronic products, product quality and performance. Therefore, in the PCB production process, some important indicators should be paid attention to to ensure that the quality of the product meets the requirements. 1oz vs 2oz This article will introduce the important indicators of PCB board manufacturing from the following three aspects.
First, PCB board material
The material of PCB is one of the important factors affecting the quality of PCB. A good circuit board material should have excellent insulation properties, stable mechanical properties and high temperature properties. At present, the commonly used PCB materials on the market are FR4(glass fiber), CIM-3, CIM-1, aluminum substrate and ceramic substrate. FR4 is the most commonly used PCB material at present, with good insulation, flame retardant and mechanical strength. Choosing the right PCB material can ensure the quality and performance of the product.
Second, PCB lamination process
PCB lamination process is an important factor affecting PCB quality. how to test a circuit board with a multimeter A good PCB lamination process should control parameters such as thickness, layer number, line width, line spacing, etc., so that the PCB board composition is uniform, and it is not easy to fall off the pad or the appearance is not beautiful. In addition, in the composite process of the printed circuit board, attention should also be paid to the performance of the control layer crimping, to avoid open circuit, short circuit and other problems.
Third, PCB surface treatment
PCB surface treatment is an important factor affecting PCB quality. Good PCB surface treatment to control the solder color, nozzle hole size, plug-in hole size and other parameters. At present, the commonly used PCB surface treatment methods are HASL(instantiated tin), ENIG(electroless nickel plating) and OSP(organic coating). Different PCB surface treatment methods are suitable for different applications, and need to be selected according to the actual product requirements.
How to evaluate PCB quality?
To evaluate the quality of printed circuit boards, factors such as appearance, internal structure and electrical performance need to be considered. Here are some common assessment methods:
1. Appearance: Check whether the PCB surface is flat, no water marks, no stratification, no oxidation.
Internal structure: By cutting the PCB board, observe whether the internal structure of the PCB board is tight, whether the copper foil is uniform, etc.
3. Electrical performance: The quality of PCB can be judged by testing the electrical performance of PCB such as resistance, capacitance, dielectric constant and short circuit.
4. Durability: Test the durability of PCB board by conducting simulation technical environment analysis tests, such as temperature circulation, humidity, circulation, salt spray, etc.
In short, in the PCB production process, we should pay attention to important indicators such as materials, processes, and parameters to improve product quality and stability. At the same time, the evaluation of the quality of the printed circuit board needs to be considered from many aspects to ensure that the product meets the requirements.