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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: | |||
|---|---|---|---|---|---|---|
| Copper Tape 50mm Kapton Tape 50mm Masking Tape 20mm Sellotape (clear) A4 Printer Paper A4 pvc for laser printer Steel Wool | PhotoSensitive Dry Film 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 PhotoSensitive Dry Film on Flexible Copper Tape Clad
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| a) The PhotoSensitive dry Film is sensitive to UV light do this part in a dark room. | b) Cut a piece of PhotoSensitive Dry Film at the size of the copper clad. | c) Remove protective cover from one side of The PhotoSensitive Dry Film. |
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| d) Add few drops of water on the copper clad and apply The uncovered side of PhotoSensitive Dry Film 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 two A4 papers folded to half. | f) Feed the folded papers with clad through a hot 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 film on the substrate.
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| a) Design your circuit graphicly with inkscape. | b) Duplicate Circuit design and print on A4 transparent PVC with a laser printer. | c) Cut PhotoMask use Precision Knife and Ruler. |
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| d) Tape two PhotoMask layers with a clear sellotape. check for alignment and direction!. two layers are used for a darker black color and better light proof. | 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 PhotoSensitive Dry Film From Copper Traces
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| a) | b) | c) |