METHODS OF FORMING TRANSISTOR CONTACTS AND VIA OPENINGS
    4.
    发明申请
    METHODS OF FORMING TRANSISTOR CONTACTS AND VIA OPENINGS 审中-公开
    形成晶体管接触和开口的方法

    公开(公告)号:US20080206991A1

    公开(公告)日:2008-08-28

    申请号:US11678059

    申请日:2007-02-22

    Abstract: A method of forming contacts to a transistor comprises depositing a dielectric layer on a substrate having the transistor, etching a first opening in the dielectric layer that contacts a gate stack of the transistor, depositing a sacrificial material in the first opening, and etching a second and a third opening in the dielectric layer that contact a source and a drain region of the transistor, wherein the second and third openings are etched after the first opening is etched. By etching the opening to the gate stack first, defects such as contact-to-gate shorts are reduced or eliminated.

    Abstract translation: 形成与晶体管的接触的方法包括在具有晶体管的衬底上沉积电介质层,蚀刻介电层中接触晶体管栅极堆叠的第一开口,在第一开口中沉积牺牲材料,并蚀刻第二 以及在所述电介质层中与所述晶体管的源极和漏极区域接触的第三开口,其中在蚀刻所述第一开口之后蚀刻所述第二和第三开口。 首先通过蚀刻到栅极堆叠的开口,减少或消除诸如接触到栅极短路的缺陷。

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