US Patent 11477856 Abraded bus bar area of CNT resistive element

A carbon allotrope element includes a carbon allotrope layer formed from a carbon allotrope material impregnated with a dielectric resin and having a first surface. The carbon allotrope element further includes a first bus bar in communication with the first surface, and a second bus bar in communication with the first surface and non-adjacent to the first bus bar. The first surface includes a layer of the dielectric resin and a plurality of abraded regions, and each of the first and second bus bars is in communication with one of the plurality of abraded regions of the first surface.