US Patent 7572994 Keypad and method for fabricating same

Disclosed is a keypad and method for fabricating same. The keypad comprises at least one key top, a waveguide having an upper surface on which the key top is disposed and a lower surface on which a plurality of reflective patterns are formed to reflect part of light traveling in the waveguide toward the key top, a lower elastic layer disposed below the waveguide, and an upper elastic layer disposed on top of the waveguide so as to be interposed between the key top and the waveguide.