PTFE高频板钻孔参数研究

PTFE high frequency board drilling parameter evaluate

PCB行业越来越多的使用高频高速板材来满足信号传输速度、信号完整性及阻抗匹配等特殊要求。聚四氟乙烯(PTFE)是一种广泛应用的高频高速材料,该材料具有优良的介电性能和耐候性;但由于PTFE独特的化学性能,该材料在加工中存在很大问题,特别是在钻孔工序会出现铜瘤、ICT(内层孔壁分离)等不良现象,该问题已成为业界使用PTFE材料最难解决的问题之一。通过优化钻孔工艺,包括采用DOE试验设计优化钻孔参数、优化钻孔时的技术方法,解决PTFE材料钻孔中存在的孔内铜瘤、ICT等不良问题。

PCB industry use more and more high-frequency and high-speed material to meet the requirements of high-frequency signal transmission, signal integrity and impedance matching. PTFE is a widely used high-frequency and high-speed material with excellent dielectric properties and Thermal performance. However, Because of its unique chemical inertness, it will inevitably generate undesirable phenomena in the drilling process, such as nodules, roughness, nail heading and the inner layer separation. In this paper, the orthogonal experimental design was adopted to evaluate optimal drilling parameters and technology methods for the four diameters drilling bit with different drilling parameters by special drilling stacked plate structure. According to the experimental results, the optimal drilling parameters and technology methods were defined.