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Improved device performance of recessed-gate AlGaN/GaN HEMTs by using in-situ N_(2)O radical treatment

Chinese Physics B 2022年第5期31卷 609-614页

作者： Xinchuang Zhang Mei Wu Bin Hou Xuerui Niu Hao Lu Fuchun Jia Meng Zhang Jiale Du Ling Yang Xiaohua Ma Yue Hao School of Advanced Materials and Nanotechnology Xidian UniversityXi’an 710071China School of Microelectronics Xidian UniversityXi’an 710071China

The N_(2)O radicals in-situ treatment on gate region has been employed to improve device performance of recessedgate Al Ga N/Ga N high-electron-mobility transistors(HEMTs).The samples after gate recess etching were treated by N_(2)O radicals without physical *** in-situ treatment(IST)processing,the gate leakage currents decreased by more than one order of magnitude compared to the sample without *** fabricated HEMTs with the IST process show a low reverse gate current of 10;A/mm,high on/off current ratio of 108,and high f_(T)×L_(g)of 13.44 GHz·μm.A transmission electron microscope(TEM)imaging illustrates an oxide layer with a thickness of 1.8 nm exists at the AlGaN surface.X-ray photoelectron spectroscopy(XPS)measurement shows that the content of the Al-O and Ga-O bonds elevated after IST,indicating that the Al-N and Ga-N bonds on the AlGaN surface were broken and meanwhile the Al-O and Ga-O bonds *** oxide formed by a chemical reaction between radicals and the surface of the AlGaN barrier layer is responsible for improved device characteristics.

关键词： AlGaN/GaN high-electron-mobility transistors low gate leakage radio frequency radical treatment

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Principle and progress of radical treatment for locally advanced esophageal squamous cell carcinoma

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World Journal of Clinical Cases 2022年第35期10卷 12804-12811页

作者： Xiao-Fei Zhang Pei-Yi Liu Shu-Juan Zhang Kuai-Le Zhao Wei-Xin Zhao Department of Radiation Oncology Fudan University Shanghai Cancer CenterShanghai 200032China Department of Oncology Shanghai Medical CollegeFudan UniversityShanghai 200032China Shanghai Clinical Research Center for Radiation Oncology Shanghai Key Laboratory of Radiation Oncology Shanghai 200032China Department of Orthopedics Tongren HospitalSchool of Medicine Shanghai Jiao Tong UniversityShanghai 200336China Department of Oncology The Second People's Hospital of KashgarKashgar 844000Xinjiang Uygur Autonomous RegionChina

Esophageal squamous cell carcinoma is one of the most common malignant tumors in the digestive system in China and the *** patients are diagnosed as locally advanced or advanced *** chemoradiotherapy is the standard treatment for locally advanced esophageal squamous cell *** study intends to summarize the evidence-based medical evidence of the treatment principle of locally advanced esophageal squamous cell carcinoma,the selection of radiotherapy dose,the outline of radiotherapy target and the selection of chemotherapy *** a result,the effect of radiotherapy and chemotherapy is equivalent to that of surgery for the radical treatment of esophageal squamous cell *** the era of immunization,it is recommended to use involved field *** plus cisplatin regimen is the standard chemotherapy *** regimen and paclitaxel plus fluorouracil regimen are optional concurrent chemotherapy *** toxic and side effects of different chemotherapy regimens are different,which can be selected according to the actual situation of patients.

关键词： Esophageal squamous cell carcinoma radical radiotherapy and chemotherapy Involving field irradiation Chemoradiotherapy radical treatment

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Intraoperative radiotherapy:principles and prospects

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The Chinese-German Journal of Clinical Oncology 2014年第3期13卷 123-129页

作者： Omar Abdel-Rahman Clinical Oncology Department Faculty of MedicineAin Shams University

Intraoperative radiotherapy （IORT） in its broadest sense refers to the delivery of radiation at the time of an opera- tion. It includes multiple techniques, namely intraoperative electron irradiation, intraoperative brachytherapy and intraopera- rive photon irradiation. It has a wide range of existing and potentially enlarging clinical applications. We will discuss in this review the rationale for and use of intraoperative irradiation in conjunction with surgical exploration with or without external- beam irradiation （EBRT） and chemotherapy.

关键词： intraoperative radiotherapy (IORT) radical treatment novel surgical techniques

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