A touch screen panel is disclosed, which is capable of sensing an exact position touched by a user or instrument, or a pressured applied to the touched position, wherein the touch screen panel comprises a core including a plurality of
horizontal and vertical lines provided in a grid shape, wherein the core has a first
refractive index, and an upper surface of the core is exposed to the
atmosphere; an intermediate clad formed between each of gaps included in the core, wherein the intermediate clad has a second
refractive index which is lower than the first
refractive index, and a height of the intermediate clad is identical to a height of the core; an optical source configured to apply an optical
signal to an input end of each of the plurality of
horizontal and vertical lines; and a plurality of receivers configured to sense an intensity of the optical
signal passing through an output end of each of the plurality of
horizontal and vertical lines, the optical
signal applied by the optical source.