Photosensitive cell with light guide
US7728278B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2006 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Feb 19, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/8063
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An integrated circuit having a photosensitive cell with an entry face, a photosensitive element and at least two elements forming a light guide and placed between the entry face and the photosensitive element. The second element is located between the first element and the entry face such that the two elements guide the light coming from the entry face onto the photosensitive element and each element forms a light guide. The inner volume has a first surface located on the same side as the photosensitive element, a second surface located on the same side as the entry face, and a lateral surface joining said first surface to said second surface and separating the inner volume from the outer volume. The first surface of the inner volume of the second element has a smaller area than that of the second surface of the inner volume of the first element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.