Corrosion mitigation for metal traces
First Claim
1. A touch sensor panel comprising:
- a plurality of touch nodes, each touch node configured for forming a self-capacitance to ground;
one or more bond pads;
a plurality of routing traces that electrically couples the plurality of touch nodes to the one or more bond pads and circuitry; and
a trace positioned between edges of the touch sensor panel and the plurality of routing traces, the trace configured to at least one of block, absorb, and detect moisture.
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Accused Products
Abstract
Processes for manufacturing touch sensors with one or more guard traces to reduce the effect of moisture damage are provided. One example process can include forming one or more guard traces between an edge of the touch sensor and the metal traces that route the drive and sense lines to bond pads. The one or more guard traces can be uncoupled from the drive lines and sense lines to protect the inner metal traces from moisture damage. In some examples, ends of the one or more guard traces can be coupled to ground by copper. In other examples, ends of the one or more guard traces can be coupled to ground by indium tin oxide or the one or more guard traces can be coupled to ground by a strip of indium tin oxide. In yet other examples, the guard trace can be floating (e.g., not coupled to ground).
30 Citations
10 Claims
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1. A touch sensor panel comprising:
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a plurality of touch nodes, each touch node configured for forming a self-capacitance to ground; one or more bond pads; a plurality of routing traces that electrically couples the plurality of touch nodes to the one or more bond pads and circuitry; and a trace positioned between edges of the touch sensor panel and the plurality of routing traces, the trace configured to at least one of block, absorb, and detect moisture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of manufacturing a touch sensor panel, the method comprising:
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forming a plurality of touch nodes, each touch node configured to form a self-capacitance to ground; forming a plurality of routing traces electrically coupled to circuitry; and forming and locating a trace between edges of the touch sensor panel and the plurality of routing traces, the trace configured to at least one of block, absorb, and detect moisture. - View Dependent Claims (10)
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Specification