Forming an electrowetting module having a hydrophilic grid
US7763314B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2008 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Feb 27, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/3433
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of forming a matrix of electrowetting pixels includes forming a patterned layer of electrodes (512) on a substrate (510) and forming a patterned insulating layer (514) on the electrodes (512) and the substrate (510) to define a plurality of wells (516), each of the wells (516) aligned over one of the electrodes (512). A hydrophobic material (518) is formed on the bottom surfaces of the wells (516) and a hydrophilic material (526) is formed on sidewalls (519) of the wells (516), for example by one of selective reaction, selective deposition and selective etching, by the application of a beam (524) at an angle to impact the sidewalls (519) while substantially avoiding impacting the bottom surface (515). First and second liquids (532, 534) are disposed within the wells (516), the first liquid being not soluble in the second liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.