Light-emitting device and production thereof
US6642618B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2001 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Jun 11, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8511
Abstract
A light-emitting device comprises a substrate, electrical terminals disposed on a top side of the substrate, and a light-emitting semiconductor device disposed above the substrate. The light-emitting semiconductor device has a bottom side oriented to face toward the top side of the substrate. Electrodes are disposed on the bottom side of the light-emitting semiconductor device and electrically connected to the terminals on the substrate. A glass layer is arranged in a path of output light emitted by the light-emitting semiconductor device. The glass layer contains fluorescent material that converts at least a portion of the output light to converted light having a wavelength different from a wavelength of the output light. The fluorescent material may include SrS:Eu2+ that emits red light and (Sr, Ba, Ca)Ga2S4:Eu2+ that emits green light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.