Instructables

How to Etch a PCB

Picture of How to Etch a PCB
All materials used in this instructable came from the PCB Fab-In-A-Box Starter Kit which can be purchase here. You will also need to purchase some PCB Etching Solution.
 
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Step 1: Design

Picture of Design
First you need to design the board using a service like Eagle, Fritzing or you can even just use Adobe Illustrator if you know exactly what you want. And remember to flip the design once you have it complete before you print it out.

Step 2: Print out the design onto the shiny side of the transfer paper

Picture of Print out the design onto the shiny side of the transfer paper

Step 3: Sand the copper plate so there is a rough surface for the design to stick to when transfered

Picture of Sand the copper plate so there is a rough surface for the design to stick to when transfered
Starting from this point on you should use surgical gloves to handle the copper plate and etching solution, this helps avoid getting oils on the copper and chemicals on your hands. When sanding do an extra good job on the edges.

Step 4: Wash the copper with some water and rubbing alcohol and let it dry

Picture of Wash the copper with some water and rubbing alcohol and let it dry

Step 5: Cut out the designs and place them face down on the copper

Picture of Cut out the designs and place them face down on the copper
Try and have some margins around the design this also helps the ink stick to the plate.

Step 6: Run the copper plate with the design face down through a laminator 5-7 times until the plate is hot

Picture of Run the copper plate with the design face down through a laminator 5-7 times until the plate is hot
You can also use a iron instead of a laminator if you dont have one.

Step 7: After running the plate through a laminator or iron place the plate into a cold bath and agitate until the paper floats off

Picture of After running the plate through a laminator or iron place the plate into a cold bath and agitate until the paper floats off
IMG_4501.jpg

Step 8: Place the PCB into the etching solution and agitate for 25-30 minutes or until all the copper has dissolved around the design

Picture of Place the PCB into the etching solution and agitate for 25-30 minutes or until all the copper has dissolved around the design
If you would prefer not to agitate by hand here is another instructable I created on how to make a agitator using an old CD-ROM drive.

Step 9: Once all the copper is gone rinse it in the water bath, let it dry and use rubbing alcohol to whip off the ink transfered onto the PCB

Picture of Once all the copper is gone rinse it in the water bath, let it dry and use rubbing alcohol to whip off the ink transfered onto the PCB

Step 10: And now you have a etched PCB board but you still need to drill the holes

Picture of And now you have a etched PCB board but you still need to drill the holes
The best way to drill the holes out of a PCB board is to use a dremel, a 1/32 inch drill bit and it would be best to use a dremel press but if you cant do that you can clamp down the dremel and bring the board to the dremel by hand to drill the holes. Good luck and have fun!

DISPOSAL NOTE:
Also since the etching solution eats copper and is some what toxic you really should dispose of it with other hazardous materials and definitely DO NOT POUR IT DOWN THE DRAIN it will eat up your copper pipes!
nodoubtman1 month ago

After the iron,under the copper it's all black, is it possible that my
iron is too hot, the iron settings is before steam. What do you suggest?
thank you!|

I use the iron to do this.
MikB1 year ago
OK, I took my PCB down the local office supplies place, and they ran my PCB through the laminator 5 times, now it's covered in a massive layer of plastic, help!, how do I clean it off :)

What, no plastic pouch, you say? Oh ...
dannewoo (author)  MikB1 year ago
Ah yeah so I didnt find it necessary to use the plastic. But you can just sand it off and start again so the PCB is not wasted.
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