挠性印制板拐角防撕裂结构信号传输性能分析  

Signal performance analysis of corner anti-tear structures on FPC

作　　者：何飞[1] 吴兆华[1] 王全永[1] 

机构地区：[1]桂林电子科技大学机电工程学院

出　　处：《覆铜板资讯》2010年第2期20-24,共5页Copper Clad Laminate Information

基　　金：广西自然科学基金项目(桂科自0832242);广西制造系统与先进制造技术重点实验室主任担任课题负责人(桂科能0842006_016_Z);广西研究生教育创新计划资助项目(2008105950802M404;2009105950802M05)

摘　　要：印制电路板的不连续问题已成为当今高速数字设计研究的重点。随着频率的增长和信号上升沿的变陡,挠性印制板拐角带来的阻抗不连续会引起信号的反射,严重影响系统的性能和信号完整性。由于挠性印制板很容易在大应力的作用下造成开裂或断裂,在设计时常在拐角处采用抗撕裂结构设计以更好的改善FPC的抗撕裂的性能。文章基于三维电磁场仿真软件HFSS,对挠性印制板多种圆弧拐角仿撕裂结构进行了研究。通过建立三维物理模型,分析了多种圆弧拐角防撕裂结构对高速电路的信号完整性的影响。Research on discontinuity in PCB has became the emphasis in modem high-speed digital designs. As frequency increases and signal rise time reduces, FPC comers causes impedance discontinuities resulting in signal reflections and hence deterioration of signal integrity and system performance. As the FPC easily cracking or fracture under the influence of large stresses, in developing a design, regular using anti-tear structurals around the comer to better improve the anti-tear performance of FPC. The paper carries out a comprehensive study of various FPC comers anti-tear structures using a full-wave electromagnetic simulator HFSS. The impact of multiple arc comers anti-tear structures on SI was analyzed by modeling and simulation.

关 键 词：挠性印制板 拐角 信号完整性 防撕裂结构 

分 类 号：TN405[电子电信—微电子学与固体电子学]