A touch panel system includes a touch panel and a touch position detecting section for detecting a touch position on the touch panel. The nitrate silica gel of the lower layer 15 is produced by treating an activated silica gel with a mixed aqueous solution of copper nitrate and silver nitrate, wherein the ratio by mole of the copper element to the silver element is preferably from 1:0. The inductive component is characterized in that the gaps each have a gap width of at least 1.