Materials and Processes for Schottky Contacts on Silicon Carbide

Area of Science:

• Materials Science
• Semiconductor Physics
• Electrical Engineering

Background:

• Silicon carbide (4H-SiC) Schottky diodes are vital components in modern power electronics.
• The performance of these diodes is critically dependent on the properties of the metal/4H-SiC interface.
• Decades of research have focused on advancing 4H-SiC Schottky diode technology.

Purpose of the Study:

• To provide a comprehensive review of Schottky barriers on 4H-SiC.
• To elucidate the fundamental properties and electrical characterization of metal/4H-SiC Schottky barriers.
• To explore established and novel methods for fabricating and controlling Schottky contacts.

Main Methods:

• Review of fundamental properties and electrical characterization techniques for metal/4H-SiC Schottky barriers.
• Overview of established materials and fabrication processes for Schottky contacts.
• Presentation of non-conventional methods for tuning Schottky barrier properties.

Main Results:

• Established materials and processing techniques for fabricating Schottky contacts on 4H-SiC are presented.
• Various non-conventional methods for controlling Schottky barrier properties are discussed.
• Insights into the physical characteristics of Schottky contacts are provided.

Conclusions:

• A deeper understanding of the metal/4H-SiC interface is essential for improving Schottky diode performance.
• The review offers valuable information for device manufacturers aiming to develop superior Schottky diodes.
• Both conventional and innovative approaches contribute to advancing 4H-SiC Schottky diode technology.