English: The original Projected Capacitance keypads used a printed circuit board as the sensing element for detecting fingers through thick glass. The same circuit layout is used, with Indium Tin Oxide on clear polyester film, to produce a projected capacitance touchscreen.
I am Ronald Peter Binstead, the creator of the original image, and give permission for this image to be published by Touchscreen1 in Wikipedia.Image taken from Ron Binstead's own patent EP85901534A.
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