Method for fabricating LOCOS isolation
    2.
    发明授权
    Method for fabricating LOCOS isolation 有权
    LOCOS隔离制造方法

    公开(公告)号:US06225186B1

    公开(公告)日:2001-05-01

    申请号:US09227092

    申请日:1999-01-05

    CPC classification number: H01L21/76205

    Abstract: A method for fabricating a LOCOS isolation in accordance with the present invention, involves first forming a masking layer on the active region of a silicon substrate. Next, the masking layer is used as the etching mask and the silicon substrate is etched to form a recess. Then, a thin nitride layer is formed on the masking layer and the recess. Afterwards, a polysilicon layer is deposited on the thin nitride layer. Then, an etching process is applied to etch back the polysilicon and the thin nitride layer, thereby exposing the upper surface of the masking layer. Next, a LOCOS isolation is grown above the recess.

    Abstract translation: 根据本发明的用于制造LOCOS隔离的方法包括首先在硅衬底的有源区上形成掩模层。 接下来,使用掩模层作为蚀刻掩模,并蚀刻硅衬底以形成凹部。 然后,在掩模层和凹部上形成薄的氮化物层。 之后,在薄氮化物层上沉积多晶硅层。 然后,施加蚀刻工艺来蚀刻多晶硅和薄氮化物层,从而暴露掩模层的上表面。 接下来,在凹部上方生长LOCOS隔离。

    Method for fabricating self-aligned contact hole
    4.
    发明授权
    Method for fabricating self-aligned contact hole 有权
    制造自对准接触孔的方法

    公开(公告)号:US06303491B1

    公开(公告)日:2001-10-16

    申请号:US09283984

    申请日:1999-04-02

    CPC classification number: H01L21/76897 H01L21/76804 H01L21/76831

    Abstract: A method for fabricating a self-aligned contact hole in accordance with the present invention is disclosed. First a conductive layer, a silicon oxide layer, and a first silicon nitride layer are formed on a silicon substrate. Next, the first silicon nitride layer, the silicon oxide layer, and the conductive layer are etched to form a trench. Then, a BPSG layer is formed over the first silicon nitride layer. A photoresist layer having an opening is defined. Then, using the photoresist layer as the masking layer, a part of BPSG layer is etched to form a self-aligned hole. Next, the photoresist layer is removed. Afterward, a second silicon nitride layer is formed and etched back to form a spacer.

    Abstract translation: 公开了一种用于制造根据本发明的自对准接触孔的方法。 首先,在硅衬底上形成导电层,氧化硅层和第一氮化硅层。 接下来,蚀刻第一氮化硅层,氧化硅层和导电层以形成沟槽。 然后,在第一氮化硅层上形成BPSG层。 定义了具有开口的光刻胶层。 然后,使用光致抗蚀剂层作为掩模层,对BPSG层的一部分进行蚀刻以形成自对准孔。 接下来,去除光致抗蚀剂层。 之后,形成第二氮化硅层并将其回蚀以形成间隔物。

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