小节距CQFN外壳设计与加工工艺研究  

Research on Design and Processing Technology of Small Pitch CQFN Shell

作　　者：张金利[1] 杨振涛 余希猛 段强 ZHANG Jinli;YANG Zhentao;YU Ximeng;DUAN Qiang(No.13 Research Institute of China Electronics Technology Group Corporation,Shijiazhuang 050051,China)

机构地区：[1]中国电子科技集团公司第十三研究所,河北石家庄050051

出　　处：《电子质量》2023年第9期98-102,共5页Electronics Quality

摘　　要：基于高温共烧陶瓷(HTCC)技术,研制出0.4 mm节距的陶瓷四边无引线扁平外壳(CQFN)。采用有限元分析软件对外壳的结构可靠性进行仿真优化,优化结果表明外壳受到的应力小于陶瓷的抗弯强度;利用电磁仿真软件对外壳的高频传输性能进行仿真优化,通过优化侧面空心金属化过孔结构、空心过孔与接地共面波导的过渡结构等,实现整体传输路径50Ω阻抗匹配。利用矢量网络分析仪和探针台对制作的外壳进行了高频传输性能的测试,测试结果表明,在DC~26 GHz频段内,外壳射频端回波损耗小于15 dB,插入损耗小于0.5 dB。设计的外壳结构和射频端口传输模型可以有效地应用到其他高频CQFN封装外壳设计中。Based on high-temperature co-fired ceramic(HTCC)technology,the 0.4 mm pitch ceramic quad flat no-lead(CQFN)package is developed.Finite element analysis software is used to simulate and optimize the structural reliability of the shell,the optimization results show that the stress on the shell is less than the beading strength of the ceramic.Electromagnetic simulation software is used to simulate and optimize the high-frequency transmission performance of the shell,and the 50Ωimpedance matching of the whole transmission path is realized by optimizing the hollow metalized side structure and the transition structure of the hollow through-hole and the ground coplanar waveguide.Vector network analyzer and probe station are used to test the high frequency transmission performance of the shell.The test results show that the return loss of the RF end of the shell is less than 15 dB and the insertion loss is less than 0.5 dB in the frequency band of DC~26 GHz.The designed shell structure and RF port transmission model can be effectively applied to the design of other high-frequency CQFN enclosures.

关 键 词：0.4 mm节距 陶瓷四边无引线扁平外壳 高频传输性能 

分 类 号：TB114.35[理学—概率论与数理统计]