Light receiving element, light detector with built-in circuitry and optical pickup
US6949809B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 2002 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Jun 11, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light receiving element, comprising a semiconductor structure comprising at least a first conductivity type semiconductor layer, a first, second conductivity type semiconductor layer provided on the first conductivity type semiconductor layer in the semiconductor structure, a second, second conductivity type semiconductor layer having an impurity concentration lower than that of the first, second conductivity type semiconductor layer, a second, first conductivity type semiconductor layer provided on the second, second conductivity type semiconductor layer, or a second, first conductivity type semiconductor layer provided within the second, second conductivity type semiconductor layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.