The object of the present disclosure is to obtain a filler particle having stable insulation property, and a resin composition, grease, and a coating composition comprising the same, respectively. Fabrication techniques includes a process that includes forming a structure having a sidewall surface, forming a layer of material on the sidewall surface, and forming a device structure in contact with the layer of material, where the device structure and the layer of material are components of a device. In one embodiment of the invention, the backuprecovery system is installed in the computer system. The comparator compares the reference level with a sampling of a reference voltage to decide if the reference voltage requires correction.