High electron mobility transistors

• Main Authors: CHI-MING CHEN, CHEN-HAO CHIANG, POUN LIU, CHUNG-YI YU
• Format: Patent
• Language: Chinese; English
• Published: 24.09.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

The present disclosure relates to a donor layer of bi-layer AlGaN and associated method of fabrication within a high electron mobility transistor (HEMT) configured to provide low-resistance ohmic source and drain contacts to reduce power consumption, while maintaining a high-mobility of a two-dimensional electron gas (2DEG) within a channel of the HEMT. The donor layer of bi-layer AlGaN comprises a mobility-enhancing layer of AlzGa(1-z)N, a resistance-reducing layer of AlxGa(1-x)N disposed over the mobility-enhancing layer, wherein the ohmic source and drain contacts connect to the HEMT. A channel layer of GaN is disposed beneath the mobility-enhancing layer, wherein a 2DEG resides, forming the channel of the HEMT. 本发明涉及高电子迁移率晶体管(HEMT)内的双层AlGaN供体层和相关的制造方法，该高电子迁移率晶体管被配置为提供低电阻欧姆源极和漏极接触件以降低功率消耗同时在HEMT的沟道内保持二维电子气(2DEG)的高迁移率。双层AlGaN供体层包括AlGaN迁移率提高层和设置在迁移率提高层的上方的AlGaN电阻降低层，其中，欧姆源极和漏极接触件与HEMT连接。GaN沟道层(其中存在2DEG)设置在迁移率提高层的下方以形成HEMT的沟道。