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    • 5. 发明授权
    • Enhanced capacitance deep trench capacitor for EDRAM
    • EDRAM增强型电容深沟槽电容器
    • US08354675B2
    • 2013-01-15
    • US12775532
    • 2010-05-07
    • Oh-jung KwonJunedong LeeChengwen PeiGeng Wang
    • Oh-jung KwonJunedong LeeChengwen PeiGeng Wang
    • H01L27/108
    • H01L28/82H01L27/10867H01L29/66181
    • A substrate including a stack of a handle substrate, an optional lower insulator layer, a doped polycrystalline semiconductor layer, an upper insulator layer, and a top semiconductor layer is provided. A deep trench is formed through the top semiconductor layer, the upper insulator layer, and the doped polycrystalline semiconductor layer. Exposed vertical surfaces of the polycrystalline semiconductor layer are crystallographically etched to form random facets in the deep trench, thereby increasing the total exposed surface area of the polycrystalline semiconductor layer in the deep trench. A node dielectric and at least one conductive material are deposited to fill the trench and to form a buried strap portion, which constitute a capacitor of an eDRAM. Access transistors and other logic devices can be formed.
    • 提供了包括手柄衬底,可选的下绝缘体层,掺杂多晶半导体层,上绝缘体层和顶部半导体层的衬底的衬底。 通过顶部半导体层,上部绝缘体层和掺杂多晶半导体层形成深沟槽。 多晶半导体层的暴露的垂直表面被晶体学蚀刻以在深沟槽中形成随机刻面,从而增加深沟槽中的多晶半导体层的总暴露表面积。 沉积节点电介质和至少一种导电材料以填充沟槽并形成构成eDRAM的电容器的掩埋带部分。 可以形成存取晶体管和其它逻辑器件。
    • 6. 发明申请
    • ENHANCED CAPACITANCE DEEP TRENCH CAPACITOR FOR EDRAM
    • EDRAM的增强电容深度电容器
    • US20110272702A1
    • 2011-11-10
    • US12775532
    • 2010-05-07
    • Oh-jung KwonJunedong LeeChengwen PeiGeng Wang
    • Oh-jung KwonJunedong LeeChengwen PeiGeng Wang
    • H01L27/108H01L21/8242
    • H01L28/82H01L27/10867H01L29/66181
    • A substrate including a stack of a handle substrate, an optional lower insulator layer, a doped polycrystalline semiconductor layer, an upper insulator layer, and a top semiconductor layer is provided. A deep trench is formed through the top semiconductor layer, the upper insulator layer, and the doped polycrystalline semiconductor layer. Exposed vertical surfaces of the polycrystalline semiconductor layer are crystallographically etched to form random facets in the deep trench, thereby increasing the total exposed surface area of the polycrystalline semiconductor layer in the deep trench. A node dielectric and at least one conductive material are deposited to fill the trench and to form a buried strap portion, which constitute a capacitor of an eDRAM. Access transistors and other logic devices can be formed.
    • 提供了包括手柄衬底,可选的下绝缘体层,掺杂多晶半导体层,上绝缘体层和顶部半导体层的衬底的衬底。 通过顶部半导体层,上部绝缘体层和掺杂多晶半导体层形成深沟槽。 多晶半导体层的暴露的垂直表面被晶体学蚀刻以在深沟槽中形成随机刻面,从而增加深沟槽中的多晶半导体层的总暴露表面积。 沉积节点电介质和至少一种导电材料以填充沟槽并形成构成eDRAM的电容器的掩埋带部分。 可以形成存取晶体管和其它逻辑器件。
    • 9. 发明授权
    • Deep trench capacitor
    • 深沟槽电容器
    • US09048339B2
    • 2015-06-02
    • US13606448
    • 2012-09-07
    • Kangguo ChengJoseph ErvinChengwen PeiRavi M. TodiGeng Wang
    • Kangguo ChengJoseph ErvinChengwen PeiRavi M. TodiGeng Wang
    • H01L21/84H01L29/66H01L27/108H01L27/12
    • H01L28/60H01L21/84H01L27/10829H01L27/1087H01L27/1203H01L29/66181
    • A method of forming a deep trench capacitor in a semiconductor-on-insulator substrate is provided. The method may include providing a pad layer positioned above a bulk substrate, etching a deep trench into the pad layer and the bulk substrate extending from a top surface of the pad layer down to a location within the bulk substrate, and doping a portion of the bulk substrate to form a buried plate. The method further including depositing a node dielectric, an inner electrode, and a dielectric cap substantially filling the deep trench, the node dielectric being located between the buried plate and the inner electrode, the dielectric cap being located at a top of the deep trench, removing the pad layer, growing an insulator layer on top of the bulk substrate, and growing a semiconductor-on-insulator layer on top of the insulator layer.
    • 提供了在绝缘体上半导体衬底中形成深沟槽电容器的方法。 该方法可以包括提供定位在大块衬底之上的衬垫层,将深沟槽蚀刻到衬垫层中,以及从衬垫层的顶表面延伸到体衬底内的位置的本体衬底,以及掺杂 散装衬底形成掩埋板。 该方法还包括沉积基本上填充深沟槽的节点电介质,内部电极和电介质帽,节点电介质位于掩埋板和内部电极之间,电介质帽位于深沟槽的顶部, 去除衬垫层,在本体衬底的顶部上生长绝缘体层,以及在绝缘体层的顶部上生长绝缘体上半导体层。