Color filter array with support structures to provide improved filter thickness uniformity
US9360607B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2015 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Feb 20, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/531
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A color filter array for use on a color image sensor includes an oxide grid having sidewalls arranged to define openings in the oxide grid. Each one of the openings is to be disposed over a corresponding pixel cell of the color image sensor. Oxide support structures are disposed in an interior region of each opening in the oxide grid over a corresponding pixel cell of the color image sensor. The openings in the oxide grid are filled with color filter material of a corresponding color filter. A surface tension between each oxide support structure and the surrounding color filter material of the color filter is adapted to provide uniform thickness for the color filters within the corresponding openings in the oxide grid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.