Manufacturing method of a gas sensor integrated on a semiconductor substrate
    5.
    发明授权
    Manufacturing method of a gas sensor integrated on a semiconductor substrate 有权
    集成在半导体衬底上的气体传感器的制造方法

    公开(公告)号:US08101448B2

    公开(公告)日:2012-01-24

    申请号:US12413346

    申请日:2009-03-27

    Abstract: A method manufactures a gas sensor integrated on a semiconductor substrate. The method includes: realizing a first plurality of openings in the semiconductor substrate; realizing a crystalline silicon membrane suspended on the semiconductor substrate, forming an insulating cavity buried in the substrate; realizing a second plurality of openings in the semiconductor substrate, so as to totally suspend on the semiconductor substrate the crystalline silicon membrane; realizing, through a thermal oxidation process of the totally suspended crystalline silicon membrane, a suspended dielectric membrane; realizing, through selective photolithography, a heating element; realizing, through selective photolithography, electrodes and a pair of electric contacts; and selectively realizing, above the electrodes, a sensitive element by compacting layers of metallic oxide through a sintering process generated in the gas sensor by connecting the electrodes to a voltage generator.

    Abstract translation: 一种制造集成在半导体衬底上的气体传感器的方法。 该方法包括:实现半导体衬底中的第一多个开口; 实现悬浮在半导体衬底上的结晶硅膜,形成埋在衬底中的绝缘腔; 在半导体衬底中实现第二多个开口,以便在半导体衬底上完全悬挂晶体硅膜; 通过完全悬浮的结晶硅膜的热氧化工艺实现悬浮介电膜; 通过选择性光刻实现加热元件; 通过选择性光刻实现电极和一对电触点; 并且通过在气体传感器中产生的烧结过程,通过将电极连接到电压发生器来压实金属氧化物层,从而在电极之上选择性地实现敏感元件。

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