Projected Capacitive Touch Sensor With Asymmetric Bridge Pattern
First Claim
1. A method of manufacturing a capacitive touch sensitive device, comprising:
- patterning a matrix of pads in a first electrically conductive material on a substrate, wherein horizontally adjacent pads within each even row of the matrix of pads are electrically coupled to each other via channels to form a plurality of horizontally arranged electrodes;
positioning insulating material over the channels; and
forming conductive links over respective channels configured to electrically couple vertically adjacent pads between odd rows of the matrix of pads to form a plurality of vertically arranged electrodes, wherein dimensions of channels and the conductive links are configured such that an RC time constant (RCtc) of each of the vertically arranged electrodes substantially matches an RCtc of each of the horizontally arranged electrodes.
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Accused Products
Abstract
A capacitive touch sensitive device includes a matrix of pads patterned in a first electrically conductive material on a substrate. Horizontally adjacent pads within each even row of the matrix are electrically coupled to one another via channels to form a plurality of horizontally arranged electrodes. Insulators are positioned over respective channels. Conductive links are formed over respective insulators and are configured to electrically couple vertically adjacent pads between odd rows of the matrix to form a plurality of vertically arranged electrodes. The dimensions of the channels and the conductive links are configured such that an RC time-constant (RCtc) of each of the vertically arranged electrodes substantially matches an RCtc of each of the horizontally arranged electrodes.
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Citations
20 Claims
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1. A method of manufacturing a capacitive touch sensitive device, comprising:
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patterning a matrix of pads in a first electrically conductive material on a substrate, wherein horizontally adjacent pads within each even row of the matrix of pads are electrically coupled to each other via channels to form a plurality of horizontally arranged electrodes; positioning insulating material over the channels; and forming conductive links over respective channels configured to electrically couple vertically adjacent pads between odd rows of the matrix of pads to form a plurality of vertically arranged electrodes, wherein dimensions of channels and the conductive links are configured such that an RC time constant (RCtc) of each of the vertically arranged electrodes substantially matches an RCtc of each of the horizontally arranged electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of manufacturing a capacitive touch sensitive device, comprising:
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patterning a matrix of pads in a conductive material, wherein horizontally adjacent pads within each even row of the matrix of pads are configured to form horizontally arranged electrodes in the conductive material, and vertically adjacent pads between odd rows of the matrix of pads are configured to form vertically arranged electrodes in the conductive material; coupling the horizontally adjacent pads using channels, wherein each of the channels comprises a first dimension of about 0.4 mm in a horizontal direction, and a second dimension of about 1.0 mm in a vertical direction; positioning an insulating material over the channels; and forming conductive links over the channels to electrically couple the vertically adjacent pads, each of the conductive links comprising; a third dimension of about 0.2 mm in the horizontal direction; and a fourth dimension of about 1.2 mm in the vertical direction, wherein the first, second, third, and fourth dimensions are configured such that a resistor-capacitor time constant (RCtc) of each of the vertically arranged electrodes substantially matches an RCtc of each of the horizontally arranged electrodes. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification