Multilayer Circuit PCB

A printed circuit board (PCB) is a thin board "printed" with electrical wires and made from fiber glass or similar material. PCBs are commonly used in computer devices such as motherboards, network interface cards, and RAM chips. They are relatively cheap and quite fast. When the PCB is fabricated with several layers placed over one another, it is known as a multilayer PCB. The multiple layers establish a reliable set of predetermined interconnections for the electronic circuits.There are several techniques that can be used to accomplish this task. Some of these techniques are handicapped by their reliance on a large number of chemical processes to condition the substrate. A large number of chemical processes are needed to activate the through-holes and electrolytic copper plate between the adjacent layers. The general procedure is as follows:Obtaining the material and equipment that you will need, such as drills and electrolytic copper-plating cell.Formatting the copper substrates so that the orientation of each can be uniquely determined. This is sometimes known as patterning and can be done using a variety of methods.Drilling the layers with specific drilling equipment to create holes or vias. These vias are plated with copper to form plated-through holes.Properly cleaning the copper substrates on your board.Electroplating the PCB substrate using acid copper electroplating.Laminating the multilayer board.Under high pressure and heat, the layers fuse together.