Process for the autopositioning of a local field oxide with respect to
an insulating trench
    3.
    发明授权
    Process for the autopositioning of a local field oxide with respect to an insulating trench 失效
    局部场氧化物相对于绝缘沟槽自动定位的方法

    公开(公告)号:US4636281A

    公开(公告)日:1987-01-13

    申请号:US744339

    申请日:1985-06-13

    CPC分类号: H01L21/763 Y10S148/05

    摘要: Process for the autopositioning of a local field oxide relative to an insulating trench.This process consists of forming at least one first insulating coating on a silicon substrate, producing a second insulating coating on the first coating, anisotropically etching the first and second coating until the region of the substrate in which the trench is to be formed is exposed, forming insulating spacers on the etched flanks of the first and second coatings, anisotropically etching the substrate region in order to form the trench, the second etched coating and the spacers used as a mask for said etching, eliminating the mask, forming the insulating edges in the trench, filling said trench with a material and forming the field oxide.

    摘要翻译: 局部场氧化物相对于绝缘沟槽自动定位的方法。 该方法包括在硅衬底上形成至少一个第一绝缘涂层,在第一涂层上产生第二绝缘涂层,各向异性地蚀刻第一和第二涂层,直到其中要形成沟槽的衬底的区域被暴露, 在第一和第二涂层的蚀刻侧面上形成绝缘间隔物,各向异性地蚀刻衬底区域以形成沟槽,第二蚀刻涂层和间隔物用作所述蚀刻的掩模,消除掩模,形成绝缘边缘 沟槽,用材料填充所述沟槽并形成场氧化物。