2. Experimental2.1. MaterialsSilicone rubber (K941-U), 2,5-dimethyl-2,5-bis(tertiarybutylperoxy) hexane (C-8) were obtained fromShin-Etsu silicone, Japan. PSZ based coating resin (KiON HTA1500) was purchased from Clariant GmbH, Germany. AlN withaverage particle size of 5 m was provided from Taiyen, Taiwan.AlN particle size of 5 m abbreviated as AlN hereafter. All ofchemicals were used as received.