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Zohar Messeca Fara | idiot.io 2020

Materials: Chemicals: Tools: Software:
Copper Tape 50mm
Kapton Tape 50mm
Masking Tape 20mm
Sellotape (clear)
A4 Printer Paper
A4 pvc for laser printer
Steel Wool
Photo-Resist Foil (Negative)
Sodium Carbonate
Ferric Chloride
Citric Acid
Acetone
Ruler (30cm)
Precision Knife
Scissors
Laser Printer
Laminator (A4)
UV Box
Timer
Kitchen Towel
Inkscapeimg_20200827_121558.jpg

1 . Preparing Flexible Copper Tape Clad

a) Remove copper tape gently from
the application paper.
b) Attach application paper glossy side
To the kapton tape sticky side.
c) Cut kapton tape.
d) Apply copper tape on
kapton tape upper side.
e) Clean copper side
gently with steel wool.
f) Flexible clad is ready!

2 . Applying Photo-Resist Foil on Flexible Copper Tape Clad

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a) The Photo-Resist Foil is sensitive to UV light do
this part in a dark room.
b) Cut a piece of Photo-Resist-foil at the size of the
copper clad.
c) Remove protective cover from one side of
The Photo-Resist Foil.
d) Add few drops of water on the copper clad
and apply The uncovered side of Photo-Resist Foil
onto the copper clad. try to avoid air bubbles
wipe the clad gently with a kitchen towel
from center to edges.
e) Place the copper clad inside a two A4 papers
folded to half.
f) Pass the folded papers with clad through
a laminator . do this process twice!
g) Done!!

3 . Circuit PhotoMask Design and PhotoLithography Transfer

Circuit design is made with Inkscape a free open source vector graphics editor Photolithography Technique uses UV light to transfer a geometric pattern from a photomask (also called an optical mask)
to a photosensitive (light-sensitive) chemical foil on the substrate.

a) b) c)
d) e) f)
h) i) j)

4 . Developing Process

a) b) c)

5 . Etching

a) b) c)

6 . Removing Photo-Resist Foil From Copper Traces

a) b) c)