发明名称 |
CONDUCTIVE PLUG STRUCTURE AND FABRICATION METHOD THEREOF |
摘要 |
The present disclosure provides conductive plug structures and fabrication methods thereof. An exemplary fabrication process of the conductive plug structure includes providing a substrate; forming a mask layer having an opening on a surface of the substrate; etching the substrate to form a contact hole using the mask layer as an etching mask; etching the mask layer to increase a feature size of the opening; forming an insulation layer on an inner surface of the opening, an inner surface of the enlarged opening and a surface of the mask layer to have more edge corners, a thickness of the insulation layer being greater than a thickness of the remaining mask layer; forming a conductive layer filling the contact hole on the insulation layer; and planarizing the conductive layer and the insulation layer until a surface of the mask layer is exposed. |
申请公布号 |
US2017092537(A1) |
申请公布日期 |
2017.03.30 |
申请号 |
US201615277853 |
申请日期 |
2016.09.27 |
申请人 |
Semiconductor Manufacturing International (Shanghai) Corporation ;Semiconductor Manufacturing International (Beijing) Corporation |
发明人 |
WANG LIANG;MA XIAOTIAN |
分类号 |
H01L21/768;H01L23/532;H01L23/528;H01L23/522 |
主分类号 |
H01L21/768 |
代理机构 |
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代理人 |
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主权项 |
1. A method for fabricating a conductive plug structure, comprising:
providing a substrate; forming a mask layer having an opening on a surface of the substrate; etching the substrate to form a contact hole using the mask layer as an etching mask; etching the mask layer to increase a feature size of the opening; forming an insulation layer on an inner surface of the opening, an inner surface of the enlarged opening and a surface of the mask layer to have more edge corners, a thickness of the insulation layer being greater than a thickness of the remaining mask layer; forming a conductive layer filling the contact hole on the insulation layer; and planarizing the conductive layer and the insulation layer until a surface of the mask layer is exposed. |
地址 |
Shanghai CN |