Plastic capacitive touch screen and method of manufacturing same
US9158386B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2013 |
| Grant date | Oct 13, 2015 |
| Priority date | — |
| Expiry date | Jul 24, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/0326
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of removing portions of a conductive layer comprising a transparent conductive material and/or a metallic material disposed on a plastic substrate used for capacitive touchscreen devices includes providing a plastic substrate having a conductive layer disposed on a surface thereof and removing portions of the conductive layer at the surface of the plastic substrate to establish a pattern of electrically isolated conductive portions on the surface of the plastic substrate. The conductive portions or traces are electrically connected to a touchscreen controller, which is operable to determine a location of a touch or proximity of an object at or near the surface of the plastic substrate responsive to a detected change in capacitance. The removal process may comprise etching or laser ablating portions of the conductive layer at the surface of the plastic substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.