PCB Designing by photolitography

In this post i will explain how to make a PCB by photolitography.

At first, we start designing a scheme in proteus:

The next step is print this scheme. For do this, we click in Output/Print Layout.

First we print bottom copper:

And next repeat this with top copper.

The next step is make the drill. For do this, clik Output/Generate Gerber/Excellon files, and select the drill.
When we have Drill file, we go to the CNC machine and we repeat the same in the other post: PCB Designing with CNC, and make the holes.

To do this PCB, we will need a special  PCB cupper board:

When we have the holes, we have to go to special room, with special light to do this board because if it gives natural light to the board, be damaged.

Being in the special room, remove the blue protective plastic, placed schemes we print before matching the holes.

Now we need a special machine that emits ultraviolet light to insolation, and expose the board a minimum of 350 seconds.

To make tracks, we have to make a mixture of water, hydrochloric acid and hydrogen peroxide in equal parts, so that the acid slowly peel off the protective layer.

Gradually we see that the acid does its work and begin to see the tracks.

This process takes about five minutes.

Caution! if you expose too long plate with acid, lose tracks and that plate will not serve.

When you see the tracks and serigraphy are clearly defined, take the plate and wash with warm water.

And finally, we only have to solder the components and enjoy our PCB made ​​by photolitography.