Epoxy would be for the dielectric of a capacitor, and the thinner it is, the higher the capacitance.
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Ultra thin sandwiched mylar by the sounds of it, "loaded with sub-micron non-fired barium titanate ceramic particles" Some new sort of planer speaker 0.984252 of a thou thick, with no caps for the xover, utilising it’s own capacitance maybe??? http://multimedia.3m.com/mws/media/316065O/ultra-thin-epoxy-materials-for-embedded-capicitance.pdf http://multimedia.3m.com/mws/media/280609J/3mtm-embedded-capacitance-material-ecm.jpg Cheers George |