PROCESS FOR MANUFACTURING A MICROMECHANICAL STRUCTURE HAVING A BURIED AREA PROVIDED WITH A FILTER
    3.
    发明申请
    PROCESS FOR MANUFACTURING A MICROMECHANICAL STRUCTURE HAVING A BURIED AREA PROVIDED WITH A FILTER 有权
    制造具有过滤器的烧结区域的微观结构的方法

    公开(公告)号:US20120018819A1

    公开(公告)日:2012-01-26

    申请号:US13190254

    申请日:2011-07-25

    Abstract: A process for manufacturing a micromechanical structure envisages: forming a buried cavity within a body of semiconductor material, separated from a top surface of the body by a first surface layer; and forming an access duct for fluid communication between the buried cavity and an external environment. The method envisages: forming an etching mask on the top surface at a first access area; forming a second surface layer on the top surface and on the etching mask; carrying out an etch such as to remove, in a position corresponding to the first access area, a portion of the second surface layer, and an underlying portion of the first surface layer not covered by the etching mask until the buried cavity is reached, thus forming both the first access duct and a filter element, set between the first access duct and the same buried cavity.

    Abstract translation: 微机械结构的制造方法设想:在半导体材料体内形成通过第一表面层从主体顶表面分离的掩埋腔; 以及形成用于在所述掩埋腔和外部环境之间流体连通的进入管。 该方法设想:在第一进入区域的顶表面上形成蚀刻掩模; 在顶表面和蚀刻掩模上形成第二表面层; 进行蚀刻,以在对应于第一进入区域的位置中移除第二表面层的一部分,以及未被蚀刻掩模覆盖的第一表面层的下面部分,直到达到掩埋空腔,因此 形成第一进入管道和过滤元件,设置在第一进入管道和相同的掩埋空腔之间。

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