An electronic component is provided on a substrate. The data recording medium may include a Cu electrode layer on a substrate, and a data recording layer formed of a compound including a metal and at least one non-metal selected from the group consisting of S, Se, and Te, on the Cu electrode layer. Light emitters themselves or protrusions andor painted patternsfigures andor filtration of light filters, under the existence of illuminating light, are used for generating visual effect of the bright and dark contrast.