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    • 3. 发明授权
    • Compound semiconductor device and method of manufacturing the same
    • 化合物半导体器件及其制造方法
    • US08426260B2
    • 2013-04-23
    • US13294726
    • 2011-11-11
    • Toyoo MiyajimaToshihide KikkawaKenji ImanishiToshihiro OhkiMasahito Kanamura
    • Toyoo MiyajimaToshihide KikkawaKenji ImanishiToshihiro OhkiMasahito Kanamura
    • H01L21/338H01L29/66
    • H01L29/66462H01L29/2003H01L29/4236H01L29/7787
    • A compound semiconductor device includes: an electron transport layer formed over a substrate; an electron supply layer formed over the electron transport layer; and a cap layer formed over the electron supply layer; the cap layer includes a first compound semiconductor layer containing GaN; a second compound semiconductor layer containing AlN, which is formed over the first compound semiconductor layer; a third compound semiconductor layer containing GaN, which is formed over the second compound semiconductor layer; and at least one of a first AlGaN-containing layer and a second AlGaN-containing layer, with the first AlGaN-containing layer formed between the first compound semiconductor layer and the second compound semiconductor layer and the Al content increases toward the second compound semiconductor layer, and the second AlGaN-containing layer formed between the second compound semiconductor layer and the third compound semiconductor layer and the Al content increases toward the second compound semiconductor layer.
    • 化合物半导体器件包括:形成在衬底上的电子传输层; 形成在电子传输层上的电子供应层; 以及形成在所述电子供给层上的盖层; 盖层包括含有GaN的第一化合物半导体层; 含有AlN的第二化合物半导体层,其形成在所述第一化合物半导体层上; 含有GaN的第三化合物半导体层,其形成在所述第二化合物半导体层上; 以及第一AlGaN含有层和第二含AlGaN的层中的至少一个,其中形成在第一化合物半导体层和第二化合物半导体层之间的第一AlGaN含有层,并且Al含量朝向第​​二化合物半导体层增加 并且形成在第二化合物半导体层和第三化合物半导体层之间的第二AlGaN含量层和Al含量朝向第​​二化合物半导体层增加。
    • 10. 发明授权
    • Method for fabricating semiconductor device
    • 制造半导体器件的方法
    • US08389351B2
    • 2013-03-05
    • US13282812
    • 2011-10-27
    • Toshihiro OhkiMasahito Kanamura
    • Toshihiro OhkiMasahito Kanamura
    • H01L21/336
    • H01L29/7786H01L29/2003H01L29/4236H01L29/66462H01L2224/0603H01L2224/48247H01L2224/48257H01L2224/48472H01L2224/4903
    • A method for fabricating a semiconductor device is disclosed. A resist pattern is formed on a surface of a semiconductor layer in which a first layer and a second layer are sequentially formed on a substrate. A gate recess is formed by removing a part or the entire second layer in an opening area of the resist pattern. The resist pattern is removed. A dry etching residue attached to a bottom surface and lateral surfaces of the gate recess is removed after the resist pattern is removed. An insulating film is formed on the bottom surface, the lateral surfaces, and the semiconductor layer after the dry etching residue is removed. A gate electrode is formed via the insulating film on an area where the gate recess is formed. A source electrode and a drain electrode are formed on the semiconductor layer.
    • 公开了一种制造半导体器件的方法。 在半导体层的表面上形成抗蚀剂图案,其中在衬底上依次形成第一层和第二层。 通过去除抗蚀剂图案的开口区域中的一部分或全部第二层来形成栅极凹部。 去除抗蚀剂图案。 在除去抗蚀剂图案之后,去除附着到底部表面和浇口凹槽的侧表面的干蚀刻残留物。 在去除干蚀刻残渣之后,在底表面,侧表面和半导体层上形成绝缘膜。 在形成栅极凹部的区域,经由绝缘膜形成栅电极。 源电极和漏电极形成在半导体层上。