A method for forming a thermal silicon nitride on a semiconductor substrate is disclosed. The compounds are 4-O esters of an alkanoic acid or substituted alkanoic acid and podophyllotoxin and 4\u2032-demethylepipodophyllotoxin. The multiple terminal electrodes include first and second terminal electrodes electrically insulated from each other. In another aspect, the invention relates to a shoe sole for an article of footwear, in particular a sole for a soccer shoe. The inorganic insulating particles partially cover the first magnetic particle.