Patent ID: 7724241

Claim:
A touch panel comprising: an upper substrate having an upper conductive layer formed on one of main surfaces of the upper substrate, a lower substrate having a lower conductive layer formed on one of main surfaces of the lower substrate in a manner to face the upper conductive layer with a predetermined space, the lower substrate being glass having silicon oxide as a main principal ingredient; an antireflection layer formed between the lower conductive layer and the lower substrate; and an undercoat layer, made of any of silicon oxide and a compound having silicon oxide as a principal ingredient, disposed between the antireflection layer and the lower substrate, wherein the undercoat layer directly contacts both the antireflection layer and the lower substrate so as to enhance bonding strength between the antireflection layer and the lower substrate, wherein surface roughness of a main surface of the lower conductive layer has an Ra value of 0.7 nm to 2 nm, and wherein the undercoat layer has a thickness of 5 to 30 nm.