4 layers circuit board. This article will introduce some principles for selecting the thickness of 4 layers circuit board and provide some reasonable thickness reference values.
Firstly, we need to understand the structure of the 4 layers circuit board. A 4 layers circuit board typically consists of two internal layers and two external layers. The internal layer is achieved by covering the substrate with copper foil. The outer layer is achieved by covering copper foil with solder mask green ink. Therefore, the board thickness of a four layer circuit board includes the thickness of the copper foil in the inner layer, the thickness of the substrate, and the thickness of the solder mask green ink in the outer layer.
1. Functional requirements: Firstly, it is necessary to select the appropriate board thickness based on the functional requirements of the circuit board. Different circuit board functions require different board thicknesses to meet requirements such as signal transmission, power supply, and heat dissipation.
2. Mechanical strength: The circuit board needs to have sufficient mechanical strength during assembly and use to prevent problems such as bending and deformation. Therefore, a reasonable plate thickness should be able to meet the mechanical strength requirements of the product.
3. Cost factor: There is a certain relationship between plate thickness and cost. Excessive thickness of the plate will increase material costs, while excessive thickness of the plate may increase processing difficulty, thereby increasing production costs. Therefore, it is necessary to comprehensively consider cost factors and choose a reasonable plate thickness.
According to the above principles, a reasonable thickness for a 4 layers circuit board is generally between 0.6mm and 1.6mm. The specific choice still needs to be adjusted according to actual needs. If there are high requirements for signal transmission and heat dissipation, thinner board thickness can be chosen; If high mechanical strength is required, thicker plates can be chosen.
In short, choosing the appropriate thickness of the 4 layers circuit board is one of the key factors in ensuring stable and reliable performance of electronic products. By following the principles of functional requirements, mechanical strength, and cost factors, selecting a reasonable range of plate thickness and making appropriate adjustments can meet the needs of different products and maximize the quality and performance of electronic products.