PMID- 33919816 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210502 IS - 2072-666X (Print) IS - 2072-666X (Electronic) IS - 2072-666X (Linking) VI - 12 IP - 4 DP - 2021 Apr 14 TI - Investigation of Normally-Off p-GaN/AlGaN/GaN HEMTs Using a Self-Terminating Etching Technique with Multi-Finger Architecture Modulation for High Power Application. LID - 10.3390/mi12040432 [doi] LID - 432 AB - Normally-off p-gallium nitride (GaN) high electron mobility transistor (HEMT) devices with multi-finger layout were successfully fabricated by use of a self-terminating etching technique with Cl(2)/BCl(3)/SF(6)-mixed gas plasma. This etching technique features accurate etching depth control and low surface plasma damage. Several devices with different gate widths and number of fingers were fabricated to investigate the effect on output current density. We then realized a high current enhancement-mode p-GaN HEMT device with a total gate width of 60 mm that exhibits a threshold voltage of 2.2 V and high drain current of 6.7 A. FAU - Chang, Ya-Chun AU - Chang YC AD - Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 106319, Taiwan. FAU - Ho, Yu-Li AU - Ho YL AD - Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 106319, Taiwan. FAU - Huang, Tz-Yan AU - Huang TY AD - Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 106319, Taiwan. FAU - Huang, Ding-Wei AU - Huang DW AD - Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 106319, Taiwan. FAU - Wu, Chao-Hsin AU - Wu CH AUID- ORCID: 0000-0001-7849-773X AD - Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 106319, Taiwan. AD - Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 106319, Taiwan. LA - eng GR - NCSIST-403-V307(110)/National Chung-Shan Institute of Science & Technology/ PT - Journal Article DEP - 20210414 PL - Switzerland TA - Micromachines (Basel) JT - Micromachines JID - 101640903 PMC - PMC8070762 OTO - NOTNLM OT - enhancement-mode OT - gallium nitride (GaN) OT - multi-finger layout OT - p-GaN HEMT OT - self-terminating etching COIS- The authors declare no conflict of interest. EDAT- 2021/05/01 06:00 MHDA- 2021/05/01 06:01 PMCR- 2021/04/14 CRDT- 2021/04/30 01:13 PHST- 2021/03/16 00:00 [received] PHST- 2021/04/03 00:00 [revised] PHST- 2021/04/08 00:00 [accepted] PHST- 2021/04/30 01:13 [entrez] PHST- 2021/05/01 06:00 [pubmed] PHST- 2021/05/01 06:01 [medline] PHST- 2021/04/14 00:00 [pmc-release] AID - mi12040432 [pii] AID - micromachines-12-00432 [pii] AID - 10.3390/mi12040432 [doi] PST - epublish SO - Micromachines (Basel). 2021 Apr 14;12(4):432. doi: 10.3390/mi12040432.