Ultraviolet-light photodiode
US5130776A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1990 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Feb 22, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F77/953
Abstract
An ultraviolet-light sensitive photodiode device comprises a first semiconductor photodiode for producing a first current when illuminated by light and a second semiconductor photodiode for producing a second current when illuminated by light. The first and second photodiodes are electrically connected to produce a signal proportional to the difference between the first and second currents. The first and second photodiodes are substantially equal in sensitivity to visible and infrared light, while the first photodiode is more sensitive to ultraviolet light than the second photodiode. Thus, the photosensitive device resulting from connecting the two photodiodes has a spectrally narrow sensitivity to ultraviolet light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.