Patent ID: 7449732
Filing Date: 2008-11-11
Classification: G06F

Abstract:
1. A substrate with transparent electrodes and formed of a transparent material onto which is deposited a film of a transparent conductive material of thickness e1 and of refractive index n1, wherein said film is structured to form a set of electrodes whose contours delimit insulating spaces, the electrodes having contact areas close to an edge of the substrate for connecting to an electronic device, wherein the substrate is characterized in that the insulating spaces are filled with a transparent dielectric material of predetermined thickness e2 and of refractive index n2 so that the transparent dielectric material does not cover the electrodes, and wherein thickness e2 is a function of refractive index n2 so that a light path incident upon the substrate is unmodified at any incidence of observation thereby making a contour of the electrodes invisible to a user observing the substrate.