| 二氧化碳对同质外延生长单晶金刚石内应力的影响 |
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| 引用本文： | 贾元波,满卫东,伍正新,梁凯,林志东. 二氧化碳对同质外延生长单晶金刚石内应力的影响[J]. 人工晶体学报, 2023, 52(1): 34-40 |
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| 作者姓名： | 贾元波 满卫东 伍正新 梁凯 林志东 |
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| 作者单位： | 武汉工程大学材料科学与工程学院,湖北省等离子体化学与新材料重点实验室,武汉 430205;武汉工程大学材料科学与工程学院,湖北省等离子体化学与新材料重点实验室,武汉 430205;上海征世科技股份有限公司,上海 201700;上海征世科技股份有限公司,上海 201700 |
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| 摘 要： | 本文研究了在反应气体中引入不同浓度的CO2对微波等离子体化学气相沉积(MPCVD)法同质外延生长单晶金刚石内应力的影响,并对其作用机理进行了分析。研究发现,随着CO2浓度增加,单晶金刚石内应力逐渐减小,这是由于添加的CO2提供了含氧基团,可以有效刻蚀金刚石生长过程中的非金刚石碳,并能够降低金刚石中杂质的含量,从而避免晶格畸变,减少生长缺陷,并最终表现为单晶金刚石内应力的减小,其中金刚石内应力以压应力的形式呈现。此外反应气体中加入CO2可以降低单晶金刚石的生长速率和沉积温度,且在合适的碳氢氧原子比(5∶112∶4)下能够得到杂质少、结晶度高的单晶金刚石。
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| 关 键 词： | 单晶金刚石 MPCVD 同质外延 内应力 二氧化碳 |
| 收稿时间： | 2022-08-29 |
Effect of Carbon Dioxide on Internal Stress of Single Crystal Diamond Grown by Homogeneous Epitaxy |
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| JIA Yuanbo,MAN Weidong,WU Zhengxin,LIANG Kai,LIN Zhidong. Effect of Carbon Dioxide on Internal Stress of Single Crystal Diamond Grown by Homogeneous Epitaxy[J]. Journal of Synthetic Crystals, 2023, 52(1): 34-40 |
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| Authors: | JIA Yuanbo MAN Weidong WU Zhengxin LIANG Kai LIN Zhidong |
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| Affiliation: | 1. Key Laboratory of Plasma Chemical and Advanced Materials of Hubei Province, School of Material Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China;2. Shanghai Zhengshi Technology Co., Ltd., Shanghai 201700, China |
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| Abstract: | In this paper, the effect of introducting different concentration CO2 into reaction gas on the internal stress of single crystal diamond grown by microwave plasma chemical vapor deposition (MPCVD) homogeneous epitaxy was studied, and its mechanism was analyzed. Results show that with the increase of CO2 concentration, the internal stress of single crystal diamond decreases gradually. This is because the added CO2 provides oxygen containing groups, which can effectively etch the non-diamond carbon in the diamond growth process, and reduce the content of impurities in the diamond, so as to avoid lattice distortion and reduce growth defects. This ultimately shows the reduction of the internal stress of single crystal diamond, which is in the form of compressive stress. Besides, the addition of CO2 in reaction gas can reduce the growth rate and deposition temperature of single crystal diamond, and single crystal diamond with less impurities and high crystallinity can be obtained at a suitable carbon hydrogen oxygen atomic ratio (5∶112∶4). |
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| Keywords: | single crystal diamond MPCVD homogeneous epitaxy internal stress carbon dioxide |
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