为什么使用铜金属互连技术? 最近Xilinx公司开发的现场可编程逻辑器件(FPGA)采用了铜互连技术,例如Virtex-EM(″EM″表示扩展存储器)系列。 Virtex-EM系列器件的最上两层金属层用铜线代替传统的铝线,提供电源以及为重要的I/O和时钟信号进行布线。与铝相比,铜连线的明显优点是:其阻抗系数只有铝的一半,减小了供电分布中的电压下降,同时还减 Why Copper Interconnect Technology? Recently, Xilinx developed field-programmable gate arrays (FPGAs) that use copper interconnect technology such as the Virtex-EM (“EM” Extended Memory) family. The top two metal layers of the Virtex-EM family of devices replace copper with conventional aluminum wires, provide power and route important I / O and clock signals. The obvious advantage of copper wiring over aluminum is that its impedance coefficient is only half that of aluminum, reducing the voltage drop in the supply distribution while reducing