Guarding and shielding routing traces in proximity sensors
US9618981B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Dec 2, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04111
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A capacitive input device has a sensor electrode pattern disposed on a first side of a substrate. The sensor electrode pattern comprises a plurality of sensor electrode elements disposed on the first side of a first substrate. A plurality of routing traces is disposed along a first edge of the sensor electrode pattern on the first side of the substrate and configured to communicatively couple at least some of the sensor electrodes with a processing system. A pair of guard traces is disposed in the same layer as and brackets the plurality of routing traces. A guard overlaps the routing traces, is disposed proximate the routing traces on the first side of the substrate, and ohmically couples the pair of guard traces with one another. A second insulator is disposed between the routing traces and the guard. The second insulator and the first insulator are disposed in the same layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.