PCB-Etching-Using-Toner-Transfer-Method.pdf

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PCB Etching Using Toner Transfer Method
PCB Etching Using Toner
Transfer Method
Written By: Robot Platform
TOOLS:
Clothes Iron (1)
Electronic or Hand Driller (1)
Fine Drill Bits (0.5mm and 1mm) (1)
Hacksaw (1)
PARTS:
Copper Board (1)
Laser printer (1)
Fine sandpaper or Kitchen Scrubber (1)
Muriatic Acid / Hydrochloric Acid (HCL)
(1)
Hydrogen Peroxide (H2O2) (1)
Thinner / Acetone (1)
Plastic container (1)
Circuit diagram (1)
SUMMARY
What is the fun in making robots if you can't make your own circuit boards? This PCB
etching tutorial describes a step-by-step process to MAKE your own circuit board. There are
many tutorials already available on etching. Each method uses different materials and I have
used hydrochloric acid and hydrogen peroxide. Did you read acid? Be careful. If you are
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www.makeprojects.com
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PCB Etching Using Toner Transfer Method
cautious, you can expect great results. If you abuse these chemicals, they might turn
dangerous.
For a detailed tutorial with more pictures including a video tutorial, go
here.
Step 1 — Introduction to PCB etching using laser printer
Etching is a technique used to quickly make professional looking PCB’s with limited
resources. This technique is excellent for both through-hole components and surface-
mount devices, and the copper tracks can be as thin as 8mil to 10mil.
Step 2 — Paper Selection
Glossy photo-quality paper can be
used for etching. I have always
succeeded in using glossy
magazine sheets which are cheap
and widely available. Just make
sure that the sheet is glossy and
thick
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PCB Etching Using Toner Transfer Method
Step 3 — Printer Selection & Setup
Use a laser printer as inkjet
printers are almost useless for this
task.
Set the printer to its highest toner
output, i.e., set the printer to print
with highest contrast possible.
Once everything is set, print your
favorite circuit on the glossy paper.
Step 4 — Preparing the copper board
A normal copper board available in
your radio shop should be good for
this task.
Use a kitchen scrubber or a fine
sandpaper and sand the copper. Do
not overdo it.
Never over-scrub it such
that you remove the entire
copper layer.
Clean the surface with a cloth. Do
not touch the surface once the
cleaning is done.
If you are you are using a double
sided copper board, then be sure to
scrub the other side as well. This
will speed up the etching process
of the other side.
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PCB Etching Using Toner Transfer Method
Step 5 — Transferring Toner from Paper to Board
Now that the board and the print are ready, switch on your clothes iron to the maximum
heat and leave it for a minute or two.
Align the printed paper on the copper board with the printed side over the board.
Applying a bit of pressure, carefully move the iron on the paper for 2 - 3 minutes.
If you have long lines in your PCB, they tend to not get transfered completely.
Bolster the
lines on your copper board.
To bolster the line, you can trace that line with a sharpie or a paint pen(works better).
if
you have a black electrical tape, you can use that as well. Cut it really thin(as thick
as the line) and cover the line with the tape.
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PCB Etching Using Toner Transfer Method
Step 6
Etching Process
Drop the board into water and carefully peel off the paper and you should see the print on
the board. If the paper does not peel off easily, remove it by rubbing it slightly.
Prepare the etching solution with hydrogen peroxide and hydrochloric acid in a ratio of 3:2.
Gloves and eye protection are recommended!
Drop the board into the solution and wait for a couple of seconds.
When the fine tracks are clearly visible and the unwanted copper removed, take the board
out and clean it in water.
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www.makeprojects.com
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