Light emitting diode covered with a reflective layer and method for fabricating the same
US7271020B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2005 |
| Grant date | Sep 18, 2007 |
| Priority date | — |
| Expiry date | Sep 26, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
Abstract
A light emitting diode (LED) covered with a reflective layer by imprinting process is provided. The imprinting process includes coating a plastic layer on a mold to form an imprinting substrate; coating a reflective layer on the plastic layer and modifying the shape of the reflective layer to fit the shape of outer surfaces of the light emitting diode; softening the plastic layer and impressing the mold covered with the reflective layer upon the LED structure so that the reflective layer adheres to the surfaces of LED; and removing the mold. Because the reflective layer has high reflectivity, the light emitted from the top surface and side surfaces of LED is reflected back to the light extraction direction, and thereby the light extraction efficiency is enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.