Methods of forming isolation structures for semiconductor devices by performing a deposition-etch-deposition sequence
    3.
    发明授权
    Methods of forming isolation structures for semiconductor devices by performing a deposition-etch-deposition sequence 有权
    通过执行沉积蚀刻沉积顺序形成半导体器件的隔离结构的方法

    公开(公告)号:US08603895B1

    公开(公告)日:2013-12-10

    申请号:US13610263

    申请日:2012-09-11

    IPC分类号: H01L21/76

    CPC分类号: H01L21/76232

    摘要: In one example, the method includes forming a patterned etch mask above a semiconducting substrate, performing an etching process through the patterned etch mask to thereby form a trench in the substrate, performing a first deposition process to form a first layer of insulating material above the patterned etch mask and in the trench, and performing an etching process on the first layer of insulating material such that the post-etch thickness of the first layer of insulating material is less than an as-deposited thickness of the first layer of insulating material. The method also includes performing a second deposition process to form a second layer of insulating material on the etched first layer of insulating material, wherein the second layer of insulating material overfills the trench, and removing portions of the etched first layer of insulating material and the second layer of insulating material positioned above the patterned etch mask.

    摘要翻译: 在一个示例中,该方法包括在半导体衬底上形成图案化蚀刻掩模,通过图案化蚀刻掩模执行蚀刻工艺,从而在衬底中形成沟槽,执行第一沉积工艺以形成第一层绝缘材料 图案化的蚀刻掩模和在沟槽中,并且对第一绝缘材料层进行蚀刻处理,使得第一绝缘材料层的后蚀刻厚度小于第一绝缘材料层的沉积厚度。 该方法还包括执行第二沉积工艺以在蚀刻的第一绝缘材料层上形成第二绝缘材料层,其中第二绝缘材料层超过沟槽,以及去除蚀刻的第一绝缘材料层的部分和 位于图案化蚀刻掩模上方的第二绝缘材料层。