Patent ID: 8209861

Claim:
A method for manufacturing a touch screen sensor assembly, the method comprising: providing a first transparent substrate; depositing a first non-metallic conductive layer onto the first transparent substrate, wherein the first non-metallic conductive layer has a surface resistivity; removing the first non-metallic conductive layer from the first transparent substrate in a viewing portion of the first transparent substrate, wherein the viewing portion corresponds to an area of the first transparent substrate that is to be aligned with a display; depositing a second non-metallic conductive layer onto the viewing portion of the first transparent substrate, wherein the second non-metallic conductive layer has a surface resistivity that is higher than that of the first non-metallic conductive layer; removing portions of the second non-metallic conductive layer from the first transparent substrate to form a first pattern of electrodes; removing portions of the first non-metallic conductive layer from the first transparent substrate to form a plurality of traces; providing a second transparent substrate; depositing a third non-metallic conductive layer onto a viewing portion of the second transparent substrate, wherein the third non-metallic conductive layer has a surface resistivity that is substantially equal to that of the second non-metallic conductive layer; removing portions of the third non-metallic conductive layer from the second transparent substrate to form a second pattern of electrodes; and bonding the first transparent substrate to the second transparent substrate using an optically clear adhesive; wherein each trace on the first transparent substrate formed from the first non-metallic conductive layer is electrically coupled to at least one electrode of either the first pattern of electrodes or the second pattern of electrodes.