Radiation-emitting semiconductor chip having integrated ESD protection

US9202978B2 · kind B2 · utility

Assignee

• OSRAM Opto Semiconductors GmbH · DE

Inventors

• Andreas Löffler · Neutraubling, DE
• Christian Leirer · Friedberg, DE
• Rainer Butendeich · Regensburg, DE
• Tobias Meyer · Durham, US
• Matthias Peter · Orpund, CH

Key dates

• Filing date: Apr 26, 2012
• Grant date: Dec 1, 2015
• Expiry date: Jul 5, 2032

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/825

Abstract

A radiation-emitting semiconductor chip having a semiconductor layer sequence based on a nitride compound semiconductor material and having a pn junction includes a first protective layer having deliberately introduced crystal defects, a second protective layer having a higher doping than the first protective layer, wherein the first protective layer protects the semiconductor chip against electrostatic discharge pulses, an active zone that generates radiation disposed downstream of the first protective layer in a growth direction, wherein during operation of the semiconductor chip, a breakdown behavior of the semiconductor layer sequence in a reverse direction in regions having crystal defects differs from regions without crystal defects, and wherein in the event of electrostatic discharge pulses, electrical charge is dissipated in a homogeneously distributed manner via the regions having crystal defects.