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Laser Cutting ITO PET Samples
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Laser Cutting ITO PET Samples

by matthewelse on Thu Apr 04, 2013 12:46 pm

I have recently purchased some of the Adafruit ITO coated PET pieces online, and I was wondering whether anyone has had any success laser cutting these, or engraving these to remove the ito to make specific traces. Should I try laser cutting, or am I risking breaking it, or should I stick to cutting them by hand.

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Re: Laser Cutting ITO PET Samples

by adafruit on Tue Apr 16, 2013 11:38 pm

PET is very soft, you can likely score the ITO off at very low power. but do a bunch of tests at the edges first..then let us kniw, we are very curious :)

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Re: Laser Cutting ITO PET Samples

by westfw on Wed Apr 17, 2013 3:09 am

Many plastic stores will have NON-ito-coated PET sheets in various thicknesses; much cheaper to experiment with!
PET == Mylar == Polyester film; the same stuff as most transparencies, for instance. (except SOME are "acetate")

(OTOH, differences in thickness and production techniques can drastically change the way a plastic film behaves. I think "Shrinky-dink film" is also PET, but clearly not all mylar behaves that way. (and ever heat up an empty soda bottle (also PET) in an oven?))
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Re: Laser Cutting ITO PET Samples

by kursat on Thu Apr 16, 2015 9:37 pm

I just was able to engrave a touch pad from ITO on PET.
I've used the following cutter I have and diamond engraving tips.
It was only able to engrave only with diamond tips.
I've used 10 speed and 60 force initially, but probably I can go much lower.
Trace width initially was 0.5mm but I think I can finer as well..
The touchpad will be used with mpr121 capacitive sensor.
Touchpad1.png (2.58 KiB) Viewed 665 times

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Please be positive and constructive with your questions and comments.