Free Electronic Circuit | Make Printed Circuit Boards

Make Printed Circuit Boards

Creating Printed Circuit Boards (PCBs) is easy and fun for the whole family! But read the disclaimer -- heat and corrosive chemicals are dangerous. After you've prototyped and tested your circuit design, creating a PCB will provide a sturdy and reliable backbone for your circuit and will give your project a professional finished quality. Using PCBs can even help reduce the time you spend building circuits, especially if you are producing multiple units, as you only need to follow a parts placement diagram (there's no longer any need to worry about specific interconnections).

As is usually the case, there is more than one way to do it: there are numerous ways to create PCBs. They range from the time-consumming and difficult to the fully automated and expensive. Here we will attempt to describe a method we've found ideal for small production runs (say, a few prototypes to a couple of dozen--when you reach the hundreds, it will probably be easier, quicker and cheaper to outsource) of single- or double-sided boards.

Here is links for reference :
Assembly process the assembling process of sample circuit.
Chemical Etching Metals and Semiconductors.
Concepts of printed circuit design introduction to PCB technology.
Etching etching.
Etsen zonder fototechniek in Dutch
IC packages data handbook
Mounting and handling of semiconductor devices pdf file.
Photolithography photolithography.
Progressive wiring techniques
Surface Mount Technology Surface Mount Technology.
Surface Mount Technology pdf file.
Veroboard
Wire wrapping wire wrapping.
Wire wrapping how to wire wrap.