Light-emitting device and method for manufacturing the same
US7179672B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2004 |
| Grant date | Feb 20, 2007 |
| Priority date | — |
| Expiry date | Feb 28, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L21/0271
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A nanometer size roughened structure is formed on a surface of a light-emitting element, and luminous efficiency is improved.The roughened structure on the surface of the light-emitting element of the invention is formed into the following shape such that the refractive index smoothly changes: The surface of such light-emitting element is obtained by forming a thin film on the surface of the light-emitting element using a resin composition which contains a block copolymer or graft copolymer and forms a micophase-separated structure in a self-organization manner; selectively removing at least one phase of the microphase-separated structure of the thin film formed on the surface; and etching the surface of the light-emitting element using the remaining phase as an etching mask.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.