Toner Transfer Method

Introduction

This is the method that I use to etch my PCBs. I based my instructions off of here.

The etchant I use is a combination of Copper(II) Chloride, H2O2, and HCl. This solution was made based on this.

Procedure

  1. Print out the circuit, mirrored, on glossy mohawk color copy paper
  2. Cut out the paper to the correct dimensions
  3. Cut out the PCB to the correct dimensions
  4. Sand the front, back, and all edges of the PCB
  5. Put the PCB on its edge. Then put the two sheets of paper on either side
  6. Use the table to line up the bottom edge, and visually line up the two sheets of paper
  7. Binder opposite corners of this entire assembly
  8. Iron both sides of both exposed corners
  9. Move the binder clips to the already ironed corners
  10. Iron the remaining corners, then remove the binder clips
  11. Sandwich the board between two pads of newspapers
  12. Iron the board through the newspaper. Apply a lot of pressure to the board.
  13. Move the iron around and flip the board over a few times, and continue to iron the board
  14. Wait for the board to cool
  15. Soak the board it cold water
  16. Using a toothbrush, gently rub circles on the paper until it begins to clump up and fall off. Continue until only the toner is left
  17. Dry off the board
  18. Put the board in the etching solution and agitate it
  19. When all the unwanted copper has be etched away, remove the board from the solution
  20. Wash the board and dry it
  21. Use acetone and paper to get the toner off
  22. Inspect the board for shorts and breaks