Capacitive touch panel having dual resistive layer

A method for manufacturing a patterned substrate for a touch screen sensor assembly, the method comprising:

• providing a substrate;
• depositing a first non-metallic conductive layer onto the substrate, wherein the first non-metallic conductive layer has a surface resistivity;
• removing the first non-metallic conductive layer from the substrate in a viewing portion of the substrate, wherein the viewing portion corresponds to an area of the substrate that is to be aligned with a display when the patterned substrate is configured as part of a touch screen sensor assembly;
• depositing a second non-metallic conductive layer onto the viewing portion of the 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 to form a pattern of electrodes;
• and
• removing portions of the first non-metallic conductive layer to form a plurality of traces, wherein each trace is electrically coupled to at least one electrode.

A touch screen sensor assembly, comprising:

• first and second substrates disposed in parallel with each other with a space therebetween, each of the first and second substrates including:
• a first non-metallic conductive layer disposed on the substrate, the first non-metallic conductive layer forming a pattern of electrodes;
• and
• a second non-metallic conductive layer disposed on the substrate, the second non-metallic conductive layer forming a pattern of traces that are each electrically coupled to at least one of the electrodes, wherein the second non-metallic conductive layer has a surface resistivity that is less than the first non-metallic conductive layer.

A patterned substrate for use in a touch screen sensor assembly, the patterned substrate comprising;

• a substrate;
• a first ITO layer disposed on the substrate, the first ITO layer forming a pattern of electrodes;
• and
• a second ITO layer disposed on the substrate, the second ITO layer forming a pattern of traces that are each electrically coupled to at least one of the electrodes;
• wherein the second ITO layer has a surface resistivity that is less than that of the first ITO layer.

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 the 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.