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    • 34. 发明授权
    • Method for manufacturing vertical MOS transistors
    • 制造垂直MOS晶体管的方法
    • US5385852A
    • 1995-01-31
    • US163523
    • 1993-12-09
    • Klaus-Guenter OppermannWolfgang RoesnerFranz Hofmann
    • Klaus-Guenter OppermannWolfgang RoesnerFranz Hofmann
    • H01L21/336H01L29/78H01L21/265
    • H01L29/7813Y10S148/126
    • For manufacturing vertical MOS transistors, doped regions for a drain (11), well (3), and source (4) are formed in a vertical sequence in a substrate (1). Using a Si.sub.3 N.sub.4 mask (5), trenches (6) are etched perpendicular to the surface of the substrate (1). The trenches isolate the source (4) and well (3) structure, and are filled with doped polysilicon and are closed in an upper region with an insulation structure (8) in self-aligned fashion on the basis of local oxidation. The insulation structure (8) projects laterally beyond the trenches (6). Using the insulation structure (8) as an etching mask, via contact holes (9), that are provided with a metallization for contacting the source (4) and the well (3), are opened down into the well (3) between neighboring trenches (6).
    • 为了制造垂直MOS晶体管,在衬底(1)中以垂直顺序形成用于漏极(11),阱(3)和源极(4)的掺杂区域。 使用Si 3 N 4掩模(5),垂直于衬底(1)的表面蚀刻沟槽(6)。 沟槽隔离源(4)和阱(3)结构,并且填充有掺杂多晶硅,并且在基于局部氧化的自对准方式下在具有绝缘结构(8)的上部区域中封闭。 绝缘结构(8)横向延伸超过沟槽(6)。 使用绝缘结构(8)作为蚀刻掩模,通过接触孔(9),其具有用于接触源(4)和阱(3)的金属化,在邻近的孔(3)之间向下打开 沟槽(6)。