PCB (Print circuit Board)：印刷电路板        Footprint：封装

IC( integrated circuits)：集成电路              SMC (Surface Mounted Components)：表面组装元件

SMD ( Surface Mounted Devices)：表面组装器件

BGA(ball grid array)：球栅网格阵列封装      DIP(dual in-line package)：双列直插式封装