发明名称 |
GaN-based Schottky barrier diode with algan surface layer |
摘要 |
A Schottky diode and method of fabricating the Schottky diode using gallium nitride (GaN) materials is disclosed. The method includes providing an n-type GaN substrate having first and second opposing surfaces. The method also includes forming an ohmic metal contact electrically coupled to the first surface, forming an n-type GaN epitaxial layer coupled to the second surface, and forming an n-type aluminum gallium nitride (AlGaN) surface layer coupled to the n-type GaN epitaxial layer. The AlGaN surface layer has a thickness which is less than a critical thickness, and the critical thickness is determined based on an aluminum mole fraction of the AlGaN surface layer. The method also includes forming a Schottky contact electrically coupled to the n-type AlGaN surface layer, where, during operation, an interface between the n-type GaN epitaxial layer and the n-type AlGaN surface layer is substantially free from a two-dimensional electron gas. |
申请公布号 |
US9450112(B2) |
申请公布日期 |
2016.09.20 |
申请号 |
US201414479634 |
申请日期 |
2014.09.08 |
申请人 |
Avogy, Inc. |
发明人 |
Brown Richard J.;Prunty Thomas R.;Bour David P.;Kizilyalli Isik C.;Nie Hui;Edwards Andrew P.;Romano Linda;Raj Madhan |
分类号 |
H01L29/47;H01L29/872;H01L29/66;H01L21/02;H01L29/205;H01L29/20 |
主分类号 |
H01L29/47 |
代理机构 |
Kilpatrick Townsend & Stockton LLP |
代理人 |
Kilpatrick Townsend & Stockton LLP |
主权项 |
1. A method of fabricating a Schottky diode using gallium nitride (GaN) materials, the method comprising:
providing an n-type GaN substrate having a first surface and a second surface, the second surface opposing the first surface; forming an ohmic metal contact electrically coupled to the first surface of the n-type GaN substrate; forming an n-type GaN epitaxial layer coupled to the second surface of the n-type GaN substrate, wherein the n-type GaN epitaxial layer comprises a polar GaN material; forming an n-type aluminum gallium nitride (AlGaN) surface layer coupled to the n-type GaN epitaxial layer; and forming a Schottky contact electrically coupled to the n-type AlGaN surface layer, wherein, during operation, an interface between the n-type GaN epitaxial layer and the n-type AlGaN surface layer is substantially free from a two-dimensional electron gas. |
地址 |
San Jose CA US |