METHOD TO REDUCE ETCH VARIATION USING ION IMPLANTATION
    8.
    发明申请
    METHOD TO REDUCE ETCH VARIATION USING ION IMPLANTATION 审中-公开
    减少使用离子植入变化的方法

    公开(公告)号:US20160172466A1

    公开(公告)日:2016-06-16

    申请号:US15043759

    申请日:2016-02-15

    Abstract: The present disclosure relates to a method of forming a transistor device. In this method, first and second well regions are formed within a semiconductor substrate. The first and second well regions have first and second etch rates, respectively, which are different from one another. Dopants are selectively implanted into the first well region to alter the first etch rate to make the first etch rate substantially equal to the second etch rate. The first, selectively implanted well region and the second well region are etched to form channel recesses having equal recess depths. An epitaxial growth process is performed to form one or more epitaxial layers within the channel recesses.

    Abstract translation: 本公开涉及一种形成晶体管器件的方法。 在该方法中,第一和第二阱区形成在半导体衬底内。 第一和第二阱区域分别具有彼此不同的第一和第二蚀刻速率。 将掺杂剂选择性地注入第一阱区以改变第一蚀刻速率以使第一蚀刻速率基本上等于第二蚀刻速率。 蚀刻第一选择性注入的阱区和第二阱区以形成具有相等凹槽深度的沟槽。 进行外延生长工艺以在通道凹槽内形成一个或多个外延层。

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