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半导体器件的制作方法

申请公布号:CN104716029A

申请号:CN201310681725.7

申请日期:2013.12.12

申请公布日期:2015.06.17

申请人:
中芯国际集成电路制造(上海)有限公司

发明人:蒋莉

分类号:H01L21/28(2006.01)I

主分类号:H01L21/28(2006.01)I

代理机构:
北京市磐华律师事务所 11336

代理人:高伟;付伟佳

地址:201203 上海市浦东新区张江路18号

摘要:本发明公开了一种半导体器件的制作方法,所述方法包括:a)提供半导体衬底,所述半导体衬底上形成有钨栅极结构,所述钨栅极结构由层间介电层包围;b)回刻蚀所述钨栅极结构的一部分,以在所述钨栅极结构的上方形成凹槽;c)在所述层间介电层上和所述凹槽内形成帽层,所述帽层填满所述凹槽;d)在所述帽层上形成保护层;以及e)采用化学机械抛光去除所述保护层和所述凹槽以外的帽层。本发明提供的方法通过形成保护层,可以保护帽层,避免在化学机械抛光过程中帽层与钨栅极结构分层。

主权项:一种半导体器件的制作方法,其特征在于,所述方法包括:a)提供半导体衬底,所述半导体衬底上形成有钨栅极结构,所述钨栅极结构由层间介电层包围;b)回刻蚀所述钨栅极结构的一部分,以在所述钨栅极结构的上方形成凹槽;c)在所述层间介电层上和所述凹槽内形成帽层,所述帽层填满所述凹槽;d)在所述帽层上形成保护层;以及e)采用化学机械抛光去除所述保护层和所述凹槽以外的帽层。

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