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在ECR等离子体中GaN薄膜沉积的研究(英文)

THE INVESTIGATION OF GaN FILM DEPOSITION IN ECR PLASMA

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【作者】 陈广超; 杜小龙; 姚鑫兹; 江德仪;

【Author】 CHEN Guangchao; DU Xiaolong; YAO Xinzi; JIANG Deyi(Institute of Physics, Chinese Academy of Sciences, Beijing 100080)(Dep. Appl. Phys., Beijing Institute of Technol., Beijing 100081)

【机构】 中国科学院物理研究所!北京100080;

【摘要】 本文使用电子回旋共振等离子体增强化学沉积方法生长GaN。利用气体分配器产生一种局域高反应物浓度环境,在此环境下,测量了等离子体的电子温度Te,等离子体密度ni以及饱和离子流密度Ji与微波功率,气体压力的关系。根据这些参数,优选了沉积条件,得到了纯净的纤锌矿结构的GaN薄膜,并具有很好的光学特性。AES和XPS的实验表明薄膜中的氮空位及伴生镓被抑制。根据膜厚值,计算出的沉积速度为1μm/hr,比通常的速度大一个数量级。

【Abstract】 The ECR plasma enhanced deposition was used to grow GaN film.A high local concentration of reactant was created by a gas-distributor. The ECRcondition was diagnosed. The ion density m, electron temperature Te and ion currentdensity Ji were measured by Langmuir probe and Faraday cup. The growth conditionwas optimized in the light of these parameters. The wurtzite GaN with fine opticalproperty was grown in this condition. The results of AES and XPS showed the film isgrown without excess N vacancy and/or Ga co-deposition. The growth rate, 1m/hr,was achieved which was one-magnitude -order larger than usual ECR deposition.

【关键词】 电子回旋共振; GaN; 局域高浓度;
【Key words】 ECR; GaN; High local concentration;
  • 【文献出处】 功能材料与器件学报 ,JOURNAL OF FUNCTIONAL MATERIALS AND DEVICES , 编辑部邮箱 ,1999年02期
  • 【分类号】TN304.2
  • 【被引频次】1
  • 【下载频次】38
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