Touchpad for use as input device of e.g. personal digital assistant, has substrate supporting light-conductive layer at surface, and illuminant arranged at periphery of conductive layer, where illuminant is connected with electric circuit

摘要

The touchpad has a substrate (11A1) supporting a light-conductive layer (11J) at a surface, and another substrate (11A2) supporting an electric circuit and a conductor (11C). An adhesive layer (11`) is provided between the light-conductive layer and the substrate (11A1), and an illuminant (11L)is arranged at a periphery of the light-conductive layer, where the illuminant is connected with the electric circuit. A sensor structure is designed in the conductor that is coated on the substrate (11A2) using sputtering technique or lithography process.