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    • 15. 发明授权
    • Bottle-neck recess in a semiconductor device
    • 半导体器件中的瓶颈凹槽
    • US09054130B2
    • 2015-06-09
    • US12841763
    • 2010-07-22
    • Eric PengChao-Cheng ChenMing-Hua YuYing Hao HsiehTze-Liang LeeChii-Horng LiSyun-Ming JangShih-Hao Lo
    • Eric PengChao-Cheng ChenMing-Hua YuYing Hao HsiehTze-Liang LeeChii-Horng LiSyun-Ming JangShih-Hao Lo
    • H01L21/302H01L29/66H01L21/306H01L21/3065H01L29/165
    • H01L29/7848H01L21/30608H01L21/3065H01L29/165H01L29/66636
    • The present disclosure provides a method for fabricating a semiconductor device that includes providing a silicon substrate, forming a gate stack over the silicon substrate, performing a biased dry etching process to the substrate to remove a portion of the silicon substrate, thereby forming a recess region in the silicon substrate, performing a non-biased etching process to the recess region in the silicon substrate, thereby forming a bottle-neck shaped recess region in the silicon substrate, and epi-growing a semiconductor material in the bottle-neck shaped recess region in the silicon substrate. An embodiment may include a biased dry etching process including adding HeO2 gas and HBr gas. An embodiment may include performing a first biased dry etching process including N2 gas and performing a second biased dry etching process not including N2 gas. An embodiment may include performing an oxidation process to the recess region in the silicon substrate by adding oxygen gas to form silicon oxide on a portion of the recess region in the silicon substrate. As such, these processes form polymer protection to help form the bottle-neck shaped recess.
    • 本公开提供了一种制造半导体器件的方法,其包括提供硅衬底,在硅衬底上形成栅极堆叠,对衬底执行偏置的干蚀刻工艺以去除硅衬底的一部分,从而形成凹陷区域 在硅衬底中,对硅衬底中的凹陷区域进行非偏置蚀刻工艺,从而在硅衬底中形成瓶颈形凹部区域,并且在瓶颈形凹部区域中生长半导体材料 在硅衬底中。 一个实施例可以包括偏置的干蚀刻工艺,包括加入HeO2气体和HBr气体。 实施例可以包括执行包括N 2气体的第一偏压干法蚀刻工艺,并执行不包括N 2气体的第二偏压干式蚀刻工艺。 一个实施例可以包括通过在硅衬底中的一部分凹陷区域上添加氧气以形成氧化硅,来对硅衬底中的凹陷区域进行氧化处理。 因此,这些方法形成聚合物保护以帮助形成瓶颈形凹部。
    • 18. 发明申请
    • Epitaxy silicon on insulator (ESOI)
    • 外延绝缘体硅(ESOI)
    • US20070298593A1
    • 2007-12-27
    • US11521667
    • 2006-09-15
    • Ming-Hua YuTze-Liang LeePang-Yen Tsai
    • Ming-Hua YuTze-Liang LeePang-Yen Tsai
    • H01L21/20H01L21/84H01L21/76
    • H01L29/0649H01L21/84H01L27/1203H01L29/045H01L29/517H01L29/6659H01L29/7843H01L29/7846
    • Methods and structures for semiconductor devices with STI regions in SOI substrates is provided. A semiconductor structure comprises an SOI epitaxy island formed over a substrate. The structure further comprises an STI structure surrounding the SOI island. The STI structure comprises a second epitaxial layer on the substrate, and a second dielectric layer on the second epitaxial layer. A semiconductor fabrication method comprises forming a dielectric layer over a substrate and surrounding a device fabrication region in the substrate with an isolation trench extending through the dielectric layer. The method also includes filling the isolation trench with a first epitaxial layer and forming a second epitaxial layer over the device fabrication region and over the first epitaxial layer. Then a portion of the first epitaxial layer is replaced with an isolation dielectric, and then a device such as a transistor is formed second epitaxial layer within the device fabrication region.
    • 提供了SOI衬底中具有STI区域的半导体器件的方法和结构。 半导体结构包括在衬底上形成的SOI外延岛。 该结构还包括围绕SOI岛的STI结构。 STI结构包括在衬底上的第二外延层和在第二外延层上的第二电介质层。 一种半导体制造方法包括在衬底上形成介电层并围绕延伸穿过介电层的隔离沟槽围绕衬底中的器件制造区域。 该方法还包括用第一外延层填充隔离沟槽,并在器件制造区域上方和第一外延层上形成第二外延层。 然后用绝缘电介质代替第一外延层的一部分,然后在器件制造区域内形成诸如晶体管的器件的第二外延层。