Capacitive coupling of bond pads
In one embodiment, a system includes a touch sensor comprising a first set of electrodes and a first set of bond pads electrically coupled to the first set of electrodes. The system also includes a second set of bond pads capacitively coupled to the first set of bond pads. Each bond pad of the second set of bond pads is coincident with a bond pad of the first set of bond pads. The system also includes a circuit electrically coupled to the second set of bond pads such that signals may be communicated from the first set of bond pads to the circuit.
1. A system comprising:
a touch sensor comprising a first set of electrodes located on a first side of the touch sensor;
a first set of bond pads located on the first side of the touch sensor and electrically coupled to the first set of electrodes;
a second set of bond pads capacitively coupled to the first set of bond pads, each bond pad of the second set of bond pads coincident with a bond pad of the first set of bond pads;
a circuit electrically coupled to the second set of bond pads such that signals may be communicated from the first set of bond pads to the circuit;
a second set of electrodes located on a second side of the touch sensor; and
a third set of bond pads located on the second side of the touch sensor, the third set of bond pads electrically coupled to the second set of electrodes and electrically coupled to the circuit such that signals may be communicated from the third set of bond pads to the circuit.
2. The system of claim 1 , wherein the capacitance between the first set of bond pads and the second set of bond pads is at least ten times greater than the capacitance between the first set of electrodes and the second set of electrodes.
3. The system of claim 1 , wherein:
the first set of electrodes are arranged along a first axis; and
the second set of electrodes are arranged along a second axis, the first and second axes being substantially perpendicular to each other.
4. The system of claim 1 , wherein:
the circuit comprises the second set of bond pads;
the touch sensor comprises a first portion and a second portion, the distance between the first side of the touch sensor and the second side of the touch sensor in the first portion of the touch sensor being smaller than the distance between the first side and the second side in the second portion;
the first set of bond pads is located in the first portion of the touch sensor; and
the second set of bond pads is located in the first portion of the touch sensor.
5. The system of claim 1 , wherein one or more portions of the first set of electrodes comprise indium tin oxide (ITO).
6. The system of claim 1 , further comprising:
a first tracking coupled to the first set of bond pads; and
a second tracking coupled to the second set of bond pads, the second tracking coincident with the first tracking.
7. A method comprising:
electrically coupling a first set of bond pads to a first set of electrodes, a touch sensor comprising the first set of electrodes, the first set of bond pads and the first set of electrodes located on a first side of the touch sensor;
capacitively coupling a second set of bond pads to the first set of bond pads, each bond pad of the second set of bond pads coincident with a bond pad of the first set of bond pads;
electrically coupling a circuit to the second set of bond pads such that signals may be communicated from the first set of bond pads to the circuit;
electrically coupling a third set of bond pads to a second set of electrodes, the touch sensor comprising the second set of electrodes, the second set of electrodes and the third set of bond pads located on a second side of the touch sensor; and
electrically coupling the third set of bond pads to the circuit such that signals may be communicated from the third set of bond pads to the circuit.
8. The method of claim 7 , wherein capacitively coupling the second set of bond pads to the first set of bond pads comprises capacitively coupling the second set of bond pads to the first set of bond pads such that the capacitance between the first set of bond pads and the second set of bond pads is at least ten times greater than the capacitance between the first set of electrodes and the second set of electrodes.
9. The method of claim 7 , wherein:
the touch sensor comprises a first portion and a second portion, the distance between the first side of the touch sensor and the second side of the touch sensor in the first portion of the touch sensor being smaller than the distance between the first side and the second side in the second portion;
the circuit comprises the second set of bond pads;
electrically coupling the first set of bond pads to the first set of electrodes comprises situating the first set of bond pads in the first portion of the touch sensor; and
capacitively coupling the second set of bond pads to the first set of bond pads comprises situating the second set of bond pads in the first portion of the touch sensor.
10. The method of claim 7 , further comprising:
coupling a first tracking to the first set of bond pads; and
coupling a second tracking to the second set of bond pads, the second tracking coincident with the first tracking.
11. A system comprising:
a first set of bond pads electrically coupled to a first set of electrodes, the first set of electrodes comprised by a touch sensor, the first set of bond pads and the first set of electrodes located on a first side of the touch sensor;
a second set of bond pads capacitively coupled to the first set of bond pads, each bond pad of the second set of bond pads coincident with a bond pad of the first set of bond pads;
a second set of electrodes located on a second side of the touch sensor;
a third set of bond pads located on the second side of the touch sensor, the third set of bond pads electrically coupled to the second set of electrodes; and
wherein the second set of bond pads is electrically coupled to a circuit such that signals may be communicated from the first set of bond pads to the circuit and the third set of bond pads are electrically coupled to the circuit such that signals may be communicated from the third set of bond pads to the circuit.
12. The system of claim 11 , wherein the capacitance between the first set of bond pads and the second set of bond pads is at least ten times greater than the capacitance between the first set of electrodes and the second set of electrodes.
13. The system of claim 11 , wherein:
the first set of electrodes are arranged along a first axis; and
the second set of electrodes are arranged along a second axis, the first and second axes being substantially perpendicular to each other.
14. The system of claim 11 , wherein:
the circuit comprises the second set of bond pads;
the touch sensor comprises a first portion and a second portion, the distance between the first side of the touch sensor and the second side of the touch sensor in the first portion of the touch sensor being smaller than the distance between the first side and the second side in the second portion;
the first set of bond pads is located in the first portion of the touch sensor; and
the second set of bond pads is located in the first portion of the touch sensor.