High Voltage Vertical GaN p-n Diodes With Avalanche Capability

被引：222

作者：

Kizilyalli, Isik C. ^{[1
]}

Edwards, Andrew P. ^{[1
]}

Nie, Hui ^{[1
]}

Disney, Don ^{[1
]}

Bour, Dave ^{[1
]}

机构：

[1] Avogy Inc, San Jose, CA 95134 USA

来源：

IEEE TRANSACTIONS ON ELECTRON DEVICES | 2013年 / 60卷 / 10期

关键词：

Avalanche breakdown; gallium nitride (GaN); power diodes; power-semiconductor devices; BREAKDOWN VOLTAGE; ALGAN/GAN HEMTS;

D O I：

10.1109/TED.2013.2266664

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, vertical p-n diodes fabricated on pseudobulk gallium nitride (GaN) substrates are discussed. The measured devices demonstrate breakdown voltages of 2600 V with a differential specific on-resistance of 2 m Omega cm(2). This performance places these structures beyond the SiC theoretical limit on the power device figure of merit chart. Contrary to common belief, GaN devices do possess avalanche capability. The temperature coefficient of the breakdown voltage is positive, showing that the breakdown is indeed because of impact ionization and avalanche. This is an important property of the device for operation in inductive switching environments. Critical electric field and mobility parameters for epitaxial GaN layers grown on bulk GaN are extracted from electrical measurements. The reverse recovery time of the vertical GaN p-n diode is not discernible because it is limited by capacitance rather than minority carrier storage, and because of this its switching performance exceeds the highest speed silicon diode.

引用

页码：3067 / 3070

页数：4

共 14 条

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