Method for manufacturing MEMS device
    18.
    发明授权
    Method for manufacturing MEMS device 有权
    MEMS器件制造方法

    公开(公告)号:US08877537B2

    公开(公告)日:2014-11-04

    申请号:US13882337

    申请日:2011-05-19

    Abstract: A method for manufacturing a micro-electro-mechanical system (MEMS) device is provided. The method comprises: providing a semiconductor substrate, the semiconductor substrate having a metal interconnection structure (100) formed therein; forming a first sacrificial layer (201) on the surface of the semiconductor substrate, the material of the first sacrificial layer is amorphous carbon; etching the first sacrificial layer to form a first recess (301); covering and forming a first dielectric layer (401) on the surface of the first sacrificial layer; thinning the first dielectric layer by a chemical mechanical polishing (CMP) process, until exposing the first sacrificial layer; forming a micromechanical structure layer (500) on the surface of the first sacrificial layer and exposing the first sacrificial layer, wherein a part of the micromechanical structure layer is connected to the first dielectric layer. The method avoids polishing the amorphous carbon, shortens the period of production, and improves the production efficiency.

    Abstract translation: 提供了一种用于制造微机电系统(MEMS)装置的方法。 该方法包括:提供半导体衬底,其中形成有金属互连结构(100)的半导体衬底; 在所述半导体衬底的表面上形成第一牺牲层(201),所述第一牺牲层的材料是无定形碳; 蚀刻第一牺牲层以形成第一凹部(301); 在第一牺牲层的表面上覆盖并形成第一介电层(401); 通过化学机械抛光(CMP)工艺使第一介电层变薄,直到暴露出第一牺牲层; 在所述第一牺牲层的表面上形成微机械结构层(500)并暴露所述第一牺牲层,其中所述微机械结构层的一部分连接到所述第一介电层。 该方法避免抛光无定形碳,缩短生产周期,提高生产效率。

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