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公开(公告)号:US20090173969A1
公开(公告)日:2009-07-09
申请号:US12225580
申请日:2007-05-30
申请人: Junjiro Kikawa , Akira Suzuki , Masayoshi Kosaki , Koji Hirata
发明人: Junjiro Kikawa , Akira Suzuki , Masayoshi Kosaki , Koji Hirata
IPC分类号: H01L29/778 , H01L33/00
CPC分类号: H01L29/7786 , H01L21/02378 , H01L21/02458 , H01L21/0254 , H01L29/2003
摘要: A semiconductor device having an AlGaN—GaN heterojunction structure including an AlGaN layer and a GaN layer which device exhibits no changes over time in sheet resistance.As shown in FIG. 1, in a semiconductor device having an AlGaN—GaN heterojunction structure including an AlGaN layer 1 and a GaN layer 2, when the Al molar fraction of AlGaN (x %) and the thickness of the AlGaN layer (y nm) satisfy the relations: x+y
摘要翻译: 具有包括AlGaN层和GaN层的AlGaN-GaN异质结结构的半导体器件,该器件在薄层电阻上随时间呈现不变化。 如图所示。 如图1所示,在具有包括AlGaN层1和GaN层2的AlGaN-GaN异质结结构的半导体器件中,当AlGaN的Al摩尔分数(x%)和AlGaN层的厚度(ynm)满足以下关系时: x + y <55,25 <= x <= 40,y> = 10,y小于临界厚度,从而在AlGaN层中不产生裂纹。 因此,本发明提供一种半导体器件,尽管Al摩尔分数高,实际上其表面电阻几乎没有随时间变化。