Double-sided touch sensitive panel and flex circuit bonding
First Claim
1. A capacitive touch sensor panel, comprising:
- a substrate;
a first set of traces of conductive material formed on a first side of the substrate;
a first connector area on the first side at a first edge of the substrate, the first connector area having first conductors coupled to the first set of traces;
a second set of traces of the conductive material formed on a second side of the substrate; and
a second connector area on the second side at the first edge of the substrate, the second connector area having second conductors coupled to the second set of traces;
wherein touch sensors are formed from at least one of the first and second sets of traces.
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Accused Products
Abstract
A multi-touch sensor panel can be created using a substrate with column and row traces formed on either side. Metal traces running along the border of the substrate can be used to bring the row traces to the same edge as the column traces. A single flex circuit can be fabricated to connect to the rows and columns on directly opposing sides. Flex printed circuits can be bonded to directly opposing attachment areas of a substrate by cooling one side of the substrate while bonding the other. In addition, “coverlay” material extending over right-angled traces on the flex circuit ensure that those traces do not get shorted should conductive bonding material get squeezed out during bonding. Furthermore, a spacer is placed at the distal end of the flex circuit to apply even bonding pressure over the entire flex circuit attachment area during bonding.
49 Citations
15 Claims
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1. A capacitive touch sensor panel, comprising:
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a substrate; a first set of traces of conductive material formed on a first side of the substrate; a first connector area on the first side at a first edge of the substrate, the first connector area having first conductors coupled to the first set of traces; a second set of traces of the conductive material formed on a second side of the substrate; and a second connector area on the second side at the first edge of the substrate, the second connector area having second conductors coupled to the second set of traces; wherein touch sensors are formed from at least one of the first and second sets of traces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A mobile telephone having a capacitive touch sensor panel, the capacitive touch sensor panel comprising:
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a substrate; a first set of traces of conductive material formed on a first side of the substrate; a first connector area on the first side at a first edge of the substrate, the first connector area having first conductors coupled to the first set of traces; a second set of traces of the conductive material formed on a second side of the substrate; and a second connector area on the second side at the first edge of the substrate, the second connector area having second conductors coupled to the second set of traces; wherein sensors are formed from at least one of the first and second sets of traces.
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10. A digital audio player having a capacitive touch sensor panel, the capacitive touch sensor panel comprising:
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a substrate; a first set of traces of conductive material formed on a first side of the substrate; a first connector area on the first side at a first edge of the substrate, the first connector area having first conductors coupled to the first set of traces; a second set of traces of the conductive material formed on a second side of the substrate; and a second connector area on the second side at the first edge of the substrate, the second connector area having second conductors coupled to the second set of traces; wherein sensors are formed from at least one of the first and second sets of traces.
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11. A method for forming a capacitive touch sensor panel, comprising:
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forming and arranging a first set of traces of conductive material on a first side of a substrate; reserving a first connector area on the first side at a first edge of the substrate, forming first conductors in the first connector area and connecting the first conductors to the first set of traces; forming and arranging a second set of traces of the conductive material formed on a second side of the substrate; reserving a second connector area on the second side at the first edge of the substrate, forming second conductors in the second connector area and connecting the second conductors to the second set of traces; and forming sensors from at least one of the first and second sets of traces. - View Dependent Claims (12, 13, 14, 15)
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Specification