How to build PCB Part II
http://ingenuitydias.blogspot.com/2014/01/how-to-build-pcb-part-ii.html
Second part of the Series for tutorials for PCB Manufacturing and its components required.Various layers,Drills and materials used for Itching and its process are discussed.
For First part go here:How to build PCB Part I
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.PCBs 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 vias. Advanced PCBs may contain components - capacitors, resistors or active devices - embedded in the substrate.
You can download PDF version here:How to build PCB Part II