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采用脉冲反应磁控溅射方法在Si衬底上沉积了(100)和(002)择优取向的AlN薄膜,随着溅射功率的降低或氢气浓度的增加,放电电压下降,沉积粒子能量降低,薄膜由(002)取向逐渐向(100)取向转变.在溅射气氛中加入氢气后,薄膜中的氧含量降低,表面形貌与表面粗糙度均随着择优取向的改变发生变化.溅射功率及氢气浓度对AlN薄膜择优取向的影响规律表明,氢气主要是通过降低沉积粒子的能量和在衬底表面产生吸附两种作用方式来影响AlN薄膜的择优取向.

参考文献

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