Photoelectric conversion apparatus and image pick-up system using the photoelectric conversion apparatus
US7187052B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2004 |
| Grant date | Mar 6, 2007 |
| Priority date | — |
| Expiry date | Oct 25, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/18
Abstract
A primary object of the present invention is to provide a photoelectric conversion apparatus with less leak current in a floating diffusion region. In order to obtain the above object, a photoelectric conversion apparatus according to the present invention includes a photodiode for converting light into a signal charge, a first semiconductor region having a first conductivity type, a floating diffusion region formed from a second semiconductor region having a second conductivity type for converting the signal charge generated by the photodiode into a signal voltage, the second semiconductor region being formed in the first semiconductor region, and an electrode formed above the first semiconductor region through an insulating film and having an effect of increasing a concentration of majority carriers in the first semiconductor region, in which the electrode is not formed above a depletion region formed from the second semiconductor region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.