Stacked filter and image sensor containing the same
US9666620B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 6, 2014 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Oct 6, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/8063
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A stacked filter for an image sensor including an infrared (IR) pixel is provided. The stacked filter includes a first filter layer disposed at the IR pixel. The first filter layer allows light with wavelengths of a first band to be transmitted through. The stacked filter further includes a second filter layer stacked with the first filter layer. The second filter layer allows light with wavelengths of a second band to be transmitted through. The first band partially overlaps the second band at wavelengths of a third band. The third band is narrower than the first band and the second band. The stacked filter allows light with the wavelengths of the third band to be transmitted through. Furthermore, an image sensor containing a stacked filter is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.