Pcb HD Wallpaper

PCB高清壁纸

A printed circuit board (PCB) mechanically supports and electrically connects electronic components using conductive tracks, pads and other features etched from copper sheets laminated onto a non-conductive substrate. PCB can be single sided (one copper layer), double sided (two copper layers) or multi-layer. Conductors on different layers are connected with plated-through holes called . Advanced PCB may contain components - capacitors, resistors or active devices - embedded in the substrate.