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电子工程22年16期

大尺寸 Si 基 GaN HEMT 外延薄膜的生长
鲁德,戴一航,梁利彦,周昆楠
(合肥工业大学 微电子学院,安徽 合肥 230009)

摘  要:通过金属有机物化学气相沉积(MOCVD)法,在 6 英寸硅(111)衬底上生长了出制作高电子迁移率晶体管(High Electron Mobility Transistor,HEMT)的无裂纹、高均匀性且翘曲度可控的 GaN HEMT 外延薄膜。通过引入双层 AlN/Al0.3Ga0.7N 超晶格和 AlN/GaN 超晶格作为 AlxGa1-xN 应力控制层,解决了硅基 GaN HEMT 外延的裂纹和翘曲控制问题,且二维电子气(2DEG)浓度可达 8.9×1012 cm-2,迁移率高达 1 980 cm2/(V∙s)。器件的 I-V 曲线表明当漏电流为 1 μA/mm2,击穿电压大于 800 V,具备较高的耐压和不漏电的特性。


关键词:AlGaN/GaN 异质结;高电子迁移率晶体管;二维电子气;应力控制层;外延生长



DOI:10.19850/j.cnki.2096-4706.2022.16.016


中图分类号:O484.1                                      文献标识码:A                                    文章编号:2096-4706(2022)16-0058-04


Growth of Large Size Si-Based GaN HEMT Epitaxial Films

LU De, DAI Yihang, LIANG Liyan, ZHOU Kunnan

(School of Microelectronics, Hefei University of Technology, Hefei 230009, China)

Abstract: GaN High Electron Mobility Transistor (HEMT) epitaxial films with no crack, high uniformity and controllable bowing have been grown on 6 inch Si (111) substrates through Metal-Organic Chemical Vapor Deposition (MOCVD). By introducing double layers AlN/Al0.3Ga0.7N superlattice and AlN/GaN superlattice as the AlxGa1-xN stress control layers, the cracks and warping control issues of Si-based GaN HEMT epitaxy are solved. The concentration of 2DEG could up to 8.9×1012 cm-2 and the mobility is up to 1 980 cm2 /(V∙s). The (I-V) curves of the device show that when the leakage current is 1 μA/mm2 , the breakdown voltage is greater than 800 V, which has a higher voltage resistance and non-leakage characteristics.

Keywords: AlGaN/GaN heterojunction; high electron mobility transistor; two-dimensional electron gas; stress control layer; epitaxial growth


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作者简介:鲁德(1989.01—),男,汉族,湖北孝昌人,中级工程师,在读硕士,研究方向:基于第三代宽禁带半导体材料GaN 的 MOCVD 外延生长与制备。