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    • 7. 发明申请
    • SEMICONDUCTOR DEVICE HAVING A TRENCH GATE AND METHOD OF FABRICATING THE SAME
    • 具有高温闸门的半导体器件及其制造方法
    • US20080135907A1
    • 2008-06-12
    • US12021969
    • 2008-01-29
    • Jeng-Ping LinPei-Ing Lee
    • Jeng-Ping LinPei-Ing Lee
    • H01L27/108
    • H01L29/7834H01L27/10876H01L29/42368H01L29/66621
    • A method of fabricating a semiconductor device having a trench gate is provided. First, a semiconductor substrate having a trench etch mask thereon is provided. The semiconductor substrate is etched to form a first trench having a first depth using the trench etch mask as a shield. Impurities are doped into the semiconductor substrate through the first trench to form a doped region. The doped region and the semiconductor substrate underlying the first trench are etched to form a second trench having a second depth greater than the first depth, wherein the second trench has a sidewall and a bottom. A gate insulating layer is formed on the sidewall and the bottom of the second trench. A trench gate is formed in the second trench.
    • 提供一种制造具有沟槽栅极的半导体器件的方法。 首先,提供其上具有沟槽蚀刻掩模的半导体衬底。 蚀刻半导体衬底以形成具有第一深度的第一沟槽,使用沟槽蚀刻掩模作为屏蔽。 杂质通过第一沟槽掺杂到半导体衬底中以形成掺杂区域。 蚀刻第一沟槽下面的掺杂区域和半导体衬底以形成具有大于第一深度的第二深度的第二沟槽,其中第二沟槽具有侧壁和底部。 栅极绝缘层形成在第二沟槽的侧壁和底部上。 沟槽栅极形成在第二沟槽中。