Ultraviolet light emitting device
US9972758B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2014 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Sep 10, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/853
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An ultraviolet light emitting device having high quality and high reliability is provided by preventing deterioration of electrical characteristics which is associated with an ultraviolet light emission operation and caused by a sealing resin. The ultraviolet light emitting device is an ultraviolet light emitting device including: an ultraviolet light emitting element (2) composed of a nitride semiconductor; and an ultraviolet-transparent sealing resin (3) covering the ultraviolet light emitting element (2), wherein at least a specific portion (3a) of the sealing resin (3), which is in contact with pad electrodes (16) and (17) of the ultraviolet light emitting element (2), is a first type amorphous fluororesin, a terminal functional group of a polymer or a copolymer that forms the first type amorphous fluororesin is a COOH group or a COOR group which is a reactive terminal functional group bondable to a metal that forms the pad electrodes (16) and (17), and a light emission wavelength range in the ultraviolet light emitting element (2) exists on a longer-wavelength side as compared to the long-wavelength edge of an absorption wavelength range in the amorphous fluororesin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.