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    • 1. 发明授权
    • Pre-silicide spacer removal
    • 预硅化物间隔物去除
    • US07504309B2
    • 2009-03-17
    • US11548842
    • 2006-10-12
    • Thomas W. DyerSunfei FangJiang YanJun Jung KimYaocheng LiuHuilong Zhu
    • Thomas W. DyerSunfei FangJiang YanJun Jung KimYaocheng LiuHuilong Zhu
    • H01L21/336
    • H01L29/665H01L21/32H01L29/6653H01L29/66545H01L29/6659
    • A method forms a gate conductor over a substrate, and simultaneously forms spacers on sides of the gate conductor and a gate cap on the top of the gate conductor. Isolation regions are formed in the substrate and the method implants an impurity into exposed regions of the substrate not protected by the gate conductor and the spacers to form source and drain regions. The method deposits a mask over the gate conductor, the spacers, and the source and drain regions. The mask is recessed to a level below a top of the gate conductor but above the source and drain regions, such that the spacers are exposed and the source and drain regions are protected by the mask. With the mask in place, the method then safely removes the spacers and the gate cap, without damaging the source/drain regions or the isolation regions (which are protected by the mask). Next, the method removes the mask and then forms silicide regions on the gate conductor and the source and drain regions.
    • 一种方法在衬底上形成栅极导体,同时在栅极导体的侧面和栅极导体的顶部上形成栅极盖。 在衬底中形成隔离区域,并且该方法将杂质注入未被栅极导体和间隔物保护的衬底的暴露区域中以形成源区和漏区。 该方法在栅极导体,间隔物以及源极和漏极区域上沉积掩模。 掩模凹陷到栅极导体的顶部下方但在源极和漏极区域之上的水平面,使得间隔物被暴露,并且源极和漏极区域被掩模保护。 在掩模就位的情况下,该方法然后安全地去除间隔物和栅极盖,而不损坏源极/漏极区域或隔离区域(被掩模保护)。 接下来,该方法移除掩模,然后在栅极导体和源极和漏极区域上形成硅化物区域。