METHOD FOR FORMING A POLYSILICON GATE IN TWO DRY-ETCHING STEPS
    3.
    发明申请
    METHOD FOR FORMING A POLYSILICON GATE IN TWO DRY-ETCHING STEPS 审中-公开
    在两个干蚀步骤中形成多晶硅门的方法

    公开(公告)号:WO2004012255A1

    公开(公告)日:2004-02-05

    申请号:PCT/US2003/021426

    申请日:2003-07-03

    CPC classification number: H01L21/32137

    Abstract: One embodiment of the present invention is a method used to fabricate an integrated circuit device on a wafer or substrate at a stage where a gate oxide is disposed over the wafer or substrate, a polysilicon layer is disposed thereover, a patterned hardmask is disposed thereover, a patterned antireflective coating is disposed thereover, and a patterned photoresist is disposed thereover, the method including steps of: (a) before stripping the photoresist, etching the polysilicon utilizing a first etch chemistry such as a CF 4 / CL 2 / N 2 / chemistry for a first pediod of time; and (b) etching the polysilicon utilizing a second etch chemistry such as a Hb r / CL 2 /CF 4 / He-O 2 chemistry for a second period of time.

    Abstract translation: 本发明的一个实施例是一种用于在晶片或衬底上制造集成电路器件的方法,其中栅极氧化物设置在晶片或衬底之上,其上设置多晶硅层,其上设置有图案化的硬掩模, 图案化的抗反射涂层设置在其上,并且其上布置有图案化的光致抗蚀剂,该方法包括以下步骤:(a)在剥离光致抗蚀剂之前,利用第一蚀刻化学物质例如CF4 / CL2 / N2 /化学物质蚀刻多晶硅,用于 时间的第一个时期; 和(b)使用第二蚀刻化学物质(例如Hbr / CL2 / CF4 / He-O2化学物质)蚀刻多晶硅,持续第二段时间。

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