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DIY Low Cost Flexible Sticky PCB Fabrication
Zohar Messeca Fara | idiot.io 2020
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| Materials: | Chemicals: | Tools: | Software: | |||
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| 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 | Inkscape |  | ||
Process:
1 . Preparing Flexible Copper Tape Clad
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| 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. |
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| 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. |
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| 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! |
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| 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.
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| a) | b) | c) |
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| d) | e) | f) |
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| h) | i) | j) |
4 . Developing Process
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| a) | b) | c) |
5 . Etching
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| a) | b) | c) |
6 . Removing Photo-Resist Foil From Copper Traces
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| a) | b) | c) |