Fabrication of touch sensor panel using laser ablation
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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Abstract
Fabrication of a touch sensor panel using laser ablation is disclosed. The fabricated touch sensor panel can have its touch sensors formed from conductive layers disposed on a surface such as an undersurface of the panel'"'"'s cover substrate. A fabrication method can include ablating a first conductive layer to define the first part of the touch sensors and then ablating a second conductive layer proximate to the first conductive layer to define the second part of the touch sensors. The touch sensor panel can be incorporated into a mobile telephone, a digital media player, or a personal computer.
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Citations
10 Claims
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1. A method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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depositing a first conductive layer onto a substrate; laser ablating the first conductive layer to create gaps in the first conductive layer that divide the first conductive layer into a first touch sensing pattern and a first plurality of dummy 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 touch sensing pattern; depositing a dielectric layer onto the first conductive layer, wherein the first touch sensing pattern and the first plurality of dummy regions are covered by the dielectric layer; depositing a second conductive layer onto the dielectric layer; and laser ablating the second conductive layer to create gaps in the second conductive layer that divide the second conductive layer into a second touch sensing pattern and a second plurality of dummy 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 touch sensing pattern, wherein the first plurality of dummy regions at least partially overlap the second touch sensing pattern, and wherein the second plurality of dummy regions at least partially overlap the first touch sensing pattern. - View Dependent Claims (10)
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Specification