Lighting device and method for manufacturing the same
US7301272B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2005 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Feb 28, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/84
Abstract
A lighting device and a method for manufacturing the same are described. First, a semiconductor layer of a first electrical property, an active layer and a semiconductor layer of a second electrical property are sequentially formed, and part of them are removed to form a mesa. A transparent contact layer is formed thereon, and thus forms a stack. Afterwards, a passivation layer is deposited on the stack and a first part of the semiconductor layer of the first electrical property adjacent to the stack. Part of the passivation layer is removed to expose part of the transparent contact layer. Then, an electrode of the second electrical property is formed on the exposed transparent contact layer. Afterwards, the electrode of the second electrical property is extended to the passivation layer on the first part of the semiconductor layer of the first electrical property to form a guard ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.