The use of a compound of formula, which comprises a group of sub-formula where R1, R2, R3, R4, R5, R6, X1 and Y1 are various specified organic groups wherein at least one of said groups has sufficient electron whitdrawing properties to activate the multiple bonds to polymerisation, in a stereolithographic composition. The present invention further relates to a method for operating a main electronic device for communicating within a network. In addition, multiple series select devices at one or both ends of each NAND string further ensure reduced leakage through such select devices, for both unselected and selected NAND strings. The outer ring-shaped region has a projection height for extending the life of the sputtering target. That is, remaining light of the incident light absorbed by the optical absorption layer and the photoelectric conversion layer is reflected by the reflecting electrode layer.