高频PCB基材介电常数与介电损耗的特性与改性进展

随着高频化PCB技术与产品占有越来越重要的地位，高频电路基板材料的发展也出现了高速化，其中比较重要的一方面就是低介电常数和低介质损耗因数的材料的选择，这是PCB基板材料实现高速化，高频化的重要性能项目。文章针对基板材料的介电常数与介电损耗的关系加以论述，并对它们与外部环境的关系做出相应的阐述，使得在PCB的制造中对各种基板材料进行合理正确的评估和使用。

The Dielectrics Characteristics of Base Materials for High Frequency Printed Circuit Boards and the Progress in Modification

With the application of high frequency printed circuit board in more fields,the base materials need to adapt the requirements of high-speed circuits.The most important factors are the dielectric characteristics,such as low dielectric constant and dielectric loss,which is propitious to the high transmission speed of printed circuit board. The dielectric constant and dielectric loss of base materials are discussed in this paper and the affected relation with environment conditions are also described.In addition,the modified progresses of difference base materials are evaluated.