Funneled light pipe for pixel sensors
US7524694B2 · kind B2 · utility
32Cited by
7References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2005 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Jun 17, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J1/0488
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A photo sensing structure and methods for forming the same. The structure includes (a) a semiconductor substrate and (b) a photo collection region on the semiconductor substrate. The structure also includes a funneled light pipe on top of the photo collection region. The funneled light pipe includes (i) a bottom cylindrical portion on top of the photo collection region of the photo collection region, and (ii) a funneled portion which has a tapered shape and is on top and in direct physical contact with the bottom cylindrical portion. The structure further includes a color filter region on top of the funneled light pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.