Difference between revisions of "PCB Etching Tutorial"

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== '''DIY PCB Etching : Using Chemicals''' ==
 
== '''DIY PCB Etching : Using Chemicals''' ==
 
 
Chances are you've probably seen a PCB before and it might of looked a little something like this
 
 
[Insert a picture of an example of a PCB maybe a Raspberry Pi or an Arduino etc]
 
 
The most important part of a PCB is the ''traces'' which connect the components to each other.
 
These ''traces'' made in a CAD program for PCBs like : Eagle CAD , KiCAD etc
 
 
[Insert Picture of traces here]
 
  
 
This tutorial will show you how to make a simple single sided PCB using a chemical method.
 
This tutorial will show you how to make a simple single sided PCB using a chemical method.
In summary the traces will be transferred and covered in a solid copper board , then the parts of copper not needed will stay expoxed.
+
In summary the traces will be transferred and covered in a solid copper board , then the parts of copper not needed will stay exposed.
 
Finally the parts not needed will be removed with chemicals.  
 
Finally the parts not needed will be removed with chemicals.  
  
[Insert picture of before and after here ]
 
  
 +
 +
[[File:PcbDone.jpg]]
  
 
== '''Materials Needed''' ==
 
== '''Materials Needed''' ==
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* Use WetorDry paper / fine sand paper to clean the PCB under water until it turns pink
 
* Use WetorDry paper / fine sand paper to clean the PCB under water until it turns pink
 +
 +
[[File:Sandingboard.jpg]]
 +
 
* Wipe off water with a clean towel
 
* Wipe off water with a clean towel
 
* Use acetone to remove oils from PCB  
 
* Use acetone to remove oils from PCB  
  
[ insert Cleaning pics here]
+
[[File:AcetoneClean2.jpg]]
 +
 
 +
 
  
  
Line 62: Line 58:
 
* Make sure the export file is mirrored. The Laser Printer toner is going to 'transfer' to the surface of the copper clad and become unmmirrored in the process
 
* Make sure the export file is mirrored. The Laser Printer toner is going to 'transfer' to the surface of the copper clad and become unmmirrored in the process
 
      
 
      
[insert printing pics here]
+
[[File:Tracesprinted.jpg]]
  
  
 
'''3) Transferring the Traces to the PCB:'''
 
'''3) Transferring the Traces to the PCB:'''
  
  - Press down the glossy paper with the design onto the copper PCB
+
*Press down the glossy paper with the design onto the copper PCB  
  - Use a hot iron to press down glossy paper to the PCB [INSERT PIC HERE OF IRON PRESSED]
 
  - After the glossy paper stick onto the PCB submerge the two in a tray of water and gently press down the paper so it peels off leaving the trace on the PCB  
 
  
  [insert PCB iron down pic here]
+
[[File:Tracestransfer.jpg]]
 +
 
 +
*Use a hot iron to press down glossy paper to the PCB
 +
[[File:Tracestransfer2.jpg]]
 +
 
 +
*After the glossy paper stick onto the PCB submerge the two in a tray of water and gently press down the paper so it peels off leaving the trace on the PCB
 +
 
 +
[[File:Traceswaterdip.jpg]]
 +
 
 +
*Once the paper starts to peel off under the water feel free to use your finger to gently peel the paper from the copper board
 +
 
 +
[[File:Tracespeel.jpg]]
 +
 
 +
*If after peeling the paper , white paper is still on the board re-dip the board into the water and rub off the remaining paper with your finger
 +
 
 +
[[File:Tracesrewater.jpg]]
 +
 
 +
*Dry off any water
  
  
 
  
 
'''4) Get Rid of the remaining Copper'''
 
'''4) Get Rid of the remaining Copper'''
  
  - Place the Ferric Chloride Solution Bottle  inside tray of hot water (this will heat the solution and make the PCB copper to be dissolved faster)  
+
*Place the board into a tray
  - Pour some of the solution into a tray along with your PCB  
+
 
  - Check the PCB every 5 or so minutes to check if the copper has been fully removed
+
[[File:Chemicalprep.jpg]]
 +
 
 +
*Place the Ferric Chloride Solution Bottle  inside tray of hot water (this will heat the solution and make the PCB copper to be dissolved faster)  
 +
 
 +
[[File:Heatingchemicals.jpg]]
 +
 
 +
* Pour some of the solution into a tray along with your PCB  
 +
 
 +
[[File:Chemicaladdit.jpg]]
 +
 
 +
* Check the PCB every 5 or so minutes to check if the copper has been fully removed
 +
[[File:Chemicalalmostdone.jpg]]
 +
 
 +
 
 +
 
 +
'''5) Finishing Up'''
 +
* Finally wash off the ink and you should be left with only copper lines on top of the traces printed
  
[insert PCB blood water pics here]
+
[[File:PcbDone.jpg]]

Latest revision as of 23:33, 23 May 2017

DIY PCB Etching : Using Chemicals[edit]

This tutorial will show you how to make a simple single sided PCB using a chemical method. In summary the traces will be transferred and covered in a solid copper board , then the parts of copper not needed will stay exposed. Finally the parts not needed will be removed with chemicals.


PcbDone.jpg

Materials Needed[edit]

  • Single sided copper clad board -- [[ https://www.google.com/search?q=copper+clad+fr4&ie=utf-8&oe=utf-8]]
  • Circuit board trace layout in a printable format (pdf or postscript ps works, design this with an EDA program)
  • Glossy Inkjet Photo Paper (to print the traces on)
  • Iron or press
  • Etchant chemical
    1. Ferric Chloride Solution (to dissolve the copper from the board)
    2. Muriatic Acid
  • WetorDry paper
  • Container to put PCB in with chemical solution


Steps[edit]

If you are using Ferric Chloride(FeCl3) foretchant, then start heating your etchant to 50C


1) Preparing the Copper Board: Clean It

Make sure to clean any junk from the copper board before beginning the process!

  • Use WetorDry paper / fine sand paper to clean the PCB under water until it turns pink

Sandingboard.jpg

  • Wipe off water with a clean towel
  • Use acetone to remove oils from PCB

AcetoneClean2.jpg



2) Printing the Traces:

Grab your Laser printer and print the traces onto the glossy inkjet photo paper.

  • we used walgreens 8.5x11 stock inkjet photo paper with fine results
  • We used the Noisebridge Brother HL-5470DW and generic Laser printer toner with fine results
  • Make sure your print driver isn't scaling or distorting the circuit layout
  • Use monochrome and highest resolution possible for your printer

The printer operator should also take this opportunity to provide feedback to the circuit designer:

  • Make sure the design traces are thick enough for this process (XXmil/XXmm minimum trace width with 20mil/0.508mm minimum clearance)
  • Make sure the export file is mirrored. The Laser Printer toner is going to 'transfer' to the surface of the copper clad and become unmmirrored in the process

Tracesprinted.jpg


3) Transferring the Traces to the PCB:

  • Press down the glossy paper with the design onto the copper PCB

Tracestransfer.jpg

  • Use a hot iron to press down glossy paper to the PCB

Tracestransfer2.jpg

  • After the glossy paper stick onto the PCB submerge the two in a tray of water and gently press down the paper so it peels off leaving the trace on the PCB

Traceswaterdip.jpg

  • Once the paper starts to peel off under the water feel free to use your finger to gently peel the paper from the copper board

Tracespeel.jpg

  • If after peeling the paper , white paper is still on the board re-dip the board into the water and rub off the remaining paper with your finger

Tracesrewater.jpg

  • Dry off any water


4) Get Rid of the remaining Copper

  • Place the board into a tray

Chemicalprep.jpg

  • Place the Ferric Chloride Solution Bottle inside tray of hot water (this will heat the solution and make the PCB copper to be dissolved faster)

Heatingchemicals.jpg

  • Pour some of the solution into a tray along with your PCB

Chemicaladdit.jpg

  • Check the PCB every 5 or so minutes to check if the copper has been fully removed

Chemicalalmostdone.jpg


5) Finishing Up

  • Finally wash off the ink and you should be left with only copper lines on top of the traces printed

PcbDone.jpg