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    • 7. 发明申请
    • MANUFACTURING METHOD FOR SEMICONDUCTOR DEVICE HAVING METAL GATE
    • 具有金属栅的半导体器件的制造方法
    • US20130280900A1
    • 2013-10-24
    • US13454337
    • 2012-04-24
    • Chien-Ming LaiRai-Min HuangTong-Jyun HuangChe-Hua HsuYi-Wen Chen
    • Chien-Ming LaiRai-Min HuangTong-Jyun HuangChe-Hua HsuYi-Wen Chen
    • H01L21/283
    • H01L21/823842H01L29/66545
    • A manufacturing method for a semiconductor device having a metal gate is provided. First and second gate trenches are respectively formed in first and second semiconductor devices. A work-function metal layer is formed in the first and second gate trenches. A shielding layer is formed on the substrate. A first removing step is performed, so that the remaining shielding layer is at bottom of the second gate trench and fills up the first gate trench. A second removing step is performed, so that the remaining shielding layer is at bottom of the first gate trench to expose the work-function metal layer at sidewall of the first gate trench and in the second gate trench. The work-function metal layer not covered by the remaining shielding layer is removed, so that the remaining work-function metal layer is only at bottom of the first gate trench. The remaining shielding layer is removed.
    • 提供一种具有金属栅极的半导体器件的制造方法。 第一和第二栅极沟槽分别形成在第一和第二半导体器件中。 工作功能金属层形成在第一和第二栅极沟槽中。 在基板上形成屏蔽层。 执行第一去除步骤,使得剩余的屏蔽层位于第二栅极沟槽的底部并填充第一栅极沟槽。 执行第二去除步骤,使得剩余的屏蔽层位于第一栅极沟槽的底部,以在第一栅极沟槽的侧壁和第二栅极沟槽中露出功函数金属层。 除去未被剩余屏蔽层覆盖的功函数金属层,使剩余的功函数金属层仅在第一栅极沟槽的底部。 剩下的屏蔽层被去除。