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Fabrication of touch sensor panel using laser ablation

  • US 9,652,088 B2
  • Filed: 07/30/2010
  • Issued: 05/16/2017
  • Est. Priority Date: 07/30/2010
  • Status: Active Grant
First Claim
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1. A method comprising:

  • ablating a first conductive layer to define first portions of touch sensors and a first plurality of dummy regions, the first portions connected by multiple crossover regions, wherein each dummy region of the first plurality of dummy regions is formed entirely by portions of the first conductive layer, and wherein each dummy region of the first plurality of dummy regions is electrically isolated from the first portions of touch sensors;

    after ablating the first conductive layer, depositing a dielectric layer onto the first conductive layer, wherein the first portions of touch sensors and the first plurality of dummy regions are completely covered by the dielectric layer; and

    after depositing the dielectric layer onto the first conductive layer, ablating a second conductive layer proximate to the first conductive layer to define second portions of the touch sensors and a second plurality of dummy regions, the second portions connected by multiple crossover regions, wherein each dummy region of the second plurality of dummy regions is formed entirely by portions of the second conductive layer, wherein each dummy region of the second plurality of dummy regions is electrically isolated from the second portions of touch sensors, wherein the first and second portions cross over at the respective crossover regions, wherein the first portions of touch sensors and the second plurality of dummy regions overlap, and wherein the second portions of touch sensors and the first plurality of dummy regions overlap.

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