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HgCdTe液相外延薄膜表面缺陷的控制

Keywords: 碲镉汞,液相外延,表面缺陷

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Abstract:

研究了HgCdTe液相外延薄膜表面两类宏观缺陷的形成原因.研究表明,大部分表面凹陷点(void)缺陷的形成是由衬底的蜡沾污所引入的,而表面凸起点(hill-like)是由衬底边缘脱落的CdZnTe微颗粒造成的,通过控制外延生长前的衬底处理过程,可以抑制这两类缺陷,从而生长出零(宏观)缺陷密度的优质HgCdTe外延薄膜.

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