Semiconductor chip for optoelectronics

US7145181B2 · kind B2 · utility

Assignee

• OSRAM Opto Semiconductors GmbH · DE

Inventor

• Ralph Wirth · Lappersdorf, DE

Key dates

• Filing date: Apr 26, 2002
• Grant date: Dec 5, 2006
• Expiry date: Apr 26, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/831

Abstract

A semiconductor chip, in particular a light-emitting diode, has a substrate (2), on which a sequence of semiconductor layers (3) with an active zone (5) has been applied. Above the sequence of semiconductor layers (3) there is a stepped window layer (6), which is structured in the manner of a Fresnel lens and has with regard to the coupling out of radiation the function of a hemispherical lens (7). This produces a semiconductor chip with particularly high coupling-out efficiency.