The effects of CCL composition on signal loss for high frequency application

In the past, high-frequency communication applications put emphasis on low loss while high speed signal transmission is required to achieve the integrity of the signal. In order to ensure the target of low loss on the CCL materials, most studies focus on how to reduce the polarity for resin system to achieve low Dk and low tan ¿ to improve the signal characteristics of high-speed transmission. The recent rapid development of IT industry demand for high-frequency communications, coupled with many researches show the composition of the CCL material, such as copper foil, glass fiber yarn and resin modification. This study intends to analyze the roughness of copper foil matte side, glass type and spreading uniformity to realize the impact on high frequency signals. Finally, we hope we can find a low cost solution for high frequency communications applications.