NITRIDE SEMICONDUCTOR AND METHOD THEREOF

The present specification provides a nitride semiconductor device and a method thereof. The nitride semiconductor device includes a SixNy layer and an AlGaN multilayer which changes the composition of Al according to a lamination direction to minimize the reduction of a threshold voltage and the inc...

Full description

Saved in:
Bibliographic Details
Main Authors CHO, SEONG MOO, JANG, TAE HOON, KIM, JAE MOO, HWANG, EU JIN, KIM, JUN HO
Format Patent
LanguageEnglish
Korean
Published 24.07.2015
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:The present specification provides a nitride semiconductor device and a method thereof. The nitride semiconductor device includes a SixNy layer and an AlGaN multilayer which changes the composition of Al according to a lamination direction to minimize the reduction of a threshold voltage and the increase of a leakage current generated in manufacturing the HFET device of a heterojunction structure. For this, a semiconductor device according to an embodiment includes a buffer layer; an AlGaN multilayer formed on the buffer layer; a GaN channel layer formed on the AlGaN multilayer; and an AlGaN barrier layer formed on the GaN channel layer. The Al composition of AlGaN multilayer can be changed according to the lamination direction of the AlGaN multilayer. 본 명세서는, 이종접합 구조의 HFET 소자를 제작하면서 발생하는 누설 전류 증가와 항복 전압 감소를 최소화하기 위해 적층 방향에 따라 Al의 조성이 변화하는 AlGaN 다중층 및 SiN층을 구비하는 질화물 반도체 전력 소자 및 그 제조 방법을 제공한다. 이를 위하여, 일 실시예에 따른 반도체 소자는, 버퍼층; 상기 버퍼층 상에 형성된 AlGaN 다중층; 상기 AlGaN 다중층 상에 형성된 GaN 채널층; 및 상기 GaN 채널층 상에 형성된 AlGaN 장벽층을 포함하되, 상기 AlGaN 다중층의 Al의 조성은, 상기 AlGaN 다중층의 적층 방향에 따라 변화하는 것일 수 있다.
Bibliography:Application Number: KR20140005705