Touch screen sensor
A touch screen sensor includes a visible light transparent substrate and an electrically conductive micropattern disposed on or in the visible light transparent substrate. The micropattern includes a first region micropattern within a touch sensing area and a second region micropattern. The first region micropattern has a first sheet resistance value in a first direction, is visible light transparent, and has at least 90% open area. The second region micropattern has a second sheet resistance value in the first direction. The first sheet resistance value is different from the second sheet resistance value.
1. A patterned substrate for use in a touch screen sensor, comprising:
a visible light transparent substrate; and
a plurality of alternating first and second regions disposed on or in the visible light transparent substrate, each first region comprising a first mesh bar comprising a plurality of first traces having a first width and defining a plurality of enclosed first open areas, each first mesh bar electrically connected to an electrically conductive pad for connection to an electronic device, each second region comprising a second mesh bar not electrically connected to an electrically conductive pad for connection to an electronic device, each second mesh bar comprising a plurality of selective breaks in an otherwise continuous mesh.
2. The patterned substrate of claim 1 , wherein if a total area of the plurality of alternating first and second regions is segmented into an array of 1 millimeter by 1 millimeter regions, then none of the regions has a shadowed area fraction that differs by greater than about 50 percent from an average for all of the regions.
3. The patterned substrate of claim 1 , wherein if a total area of the plurality of alternating first and second regions is segmented into an array of 1 millimeter by 1 millimeter regions, then none of the regions has a shadowed area fraction that differs by greater than about 25 percent from an average for all of the regions.
4. The patterned substrate of claim 1 , wherein if a total area of the plurality of alternating first and second regions is segmented into an array of 1 millimeter by 1 millimeter regions, then none of the regions has a shadowed area fraction that differs by greater than about 10 percent from an average for all of the regions.
5. The patterned substrate of claim 1 , wherein for each first mesh bar, the first traces of the first mesh bar and the conductive pad connected to the first mesh bar include a same metal at approximately a same thickness.
6. The patterned substrate of claim 1 , wherein each first mesh bar has at least a 90% open area.
7. The patterned substrate of claim 1 , wherein each first mesh bar has an open area between 95 and 99.5%.
8. The patterned substrate of claim 1 , wherein the visible light transparent substrate comprises a glass.
9. The patterned substrate of claim 1 , wherein the visible light transparent substrate comprises a polymer.
10. The patterned substrate of claim 1 , wherein each first mesh bar comprises randomly shaped cells.
11. The patterned substrate of claim 1 , wherein the metal traces of the first and second metal meshes have widths between 0.5 and 25 micrometers.