Material selection of PCB

Printed circuit boards are an indispensable component of modern electronic products. Due to the different performance and usage conditions required by different electronic products, material selection has a great impact on the performance and reliability of printed circuit boards.

1.Introduction

Printed circuit boards are important carriers for interconnecting electronic components, and their material selection directly affects the functionality and reliability of electronic products. The basic materials include cardboard, fiberglass, hydrocarbons, plastics, etc. Among them, fiberglass is currently the most commonly used circuit board substrate.

2.Performance requirements

The requirements for printed circuit board performance include mechanical performance, conductivity, environmental performance, and other aspects. Firstly, the circuit board needs to have sufficient strength and hardness to ensure the stable placement of electronic components. At the same time, boards have good conductivity and high tolerance to ensure the normal operation of electronic components. In addition, modern electronic products are increasingly focusing on environmental performance, and the materials used in printed circuit boards should try to avoid using substances that are harmful to the environment and human health.

3.Material selection precautions

①Select corresponding substrates according to the service conditions and performance requirements of different products, such as flame retardant, corrosion resistant and high-temperature stable materials, such as polyimide, polytetrafluoroethylene, etc., in high temperature, high humidity or strong corrosion environments.

②Select materials with good conductivity and thermal conductivity to ensure the normal operation of components, and avoid welding errors caused by high temperature that leads to PCB deformation or thermal expansion imbalance.

③Pay attention to environmental performance, choose environmentally friendly and recyclable materials, reduce environmental damage, and save production costs.

④Considering cost factors, selecting materials with high cost-effectiveness can save production costs and promote enterprise development for mass production.