改性纳米金刚石涂层微钻及其在厚铜高导热PCB加工中应用研究  

Modified nano-crystalline diamond coated micro-drill and its application on processing PCB with heavy copper and high thermal conductivity

作　　者：罗春峰 张贺勇 王骏 Luo Chunfeng;Zhang Heyong;Wang jun(Shenzhen Jinzhou Precision Technology Corp.,Shenzhen Guangdong 518116,China;Engineering Technology Research Center of Precision Micro Drill for High-performance PCB of Guangdong Province,Shenzhen Guangdong 518116,China)

机构地区：[1]深圳市金洲精工科技股份有限公司,广东深圳518116 [2]广东省高端印制板用精密微型钻头工程技术研究中心,广东深圳518116

出　　处：《印制电路信息》2022年第12期13-18,共6页Printed Circuit Information

摘　　要：厚铜高导热PCB因含有高比例无机陶瓷填料以及多层厚铜面临十分困难的机械钻孔加工问题。本文通过在硬质合金微型钻头上制作了改性纳米金刚石(MDC)涂层,并进行了加工测试研究。实验结果表明,涂层具有极低的摩擦系数,可以很好地用于厚铜高导热PCB板的加工,加工寿命可达5000孔,孔位精度Cpk(±50μm)高达3.254,几乎不出现钉头问题,孔口毛刺不超过9.358μm,加工品质可以很好地满足要求。High thermal conductive laminate for power supply is confronted with very difficult problem of mechanical drilling because it is composed of high proportion of inorganic ceramic filler and multi-layer thick copper foil. For this reason, modified nano-crystalline diamond MDC coating was deposited on cemented carbide micro-drills by Chemical Vapor Deposition, and a comparative machining test was made. The results showed that the MDC coating had extremely low friction coefficient. The service life could reach 5000 holes, and the hole location accuracy Cpk(±50 μm) was up to 3.254, and there were almost no nail head problems, and the burr height was no more than 9.358 μm. The processing quality could well meet the requirements.

关 键 词：改性纳米金刚石涂层 厚铜高导热PCB 微型钻头 寿命 

分 类 号：TN41[电子电信—微电子学与固体电子学]