Method of forming self-aligned metal lines and vias

    公开(公告)号:US09607893B1

    公开(公告)日:2017-03-28

    申请号:US15202949

    申请日:2016-07-06

    Abstract: Disclosed are embodiments of a method, wherein metal lines and vias of an integrated circuit IC) metal level of are formed without requiring separate cut masks to pattern the trenches for the metal lines and the via holes for the vias. Trenches are formed in an upper portion of a dielectric layer. Each trench is filled with a sacrificial material. A mask is formed above the dielectric layer and patterned with one or more openings, each opening exposing one or more segments of the sacrificial material in one or more of the trenches, respectively. A sidewall spacer is formed in each opening and a selective etch process is performed to form one or more via holes that extend through the sacrificial material and through the lower portion of the dielectric layer below. Subsequently, all the sacrificial material is removed and metal is deposited, thereby forming self-aligned metal lines and via(s).

    Integrated circuit line ends formed using additive processing
    3.
    发明授权
    Integrated circuit line ends formed using additive processing 有权
    使用加法处理形成的集成电路线端

    公开(公告)号:US09418935B1

    公开(公告)日:2016-08-16

    申请号:US14848558

    申请日:2015-09-09

    Abstract: Integrated circuit structures formed using methods herein include a layer, and a material-filled line in the layer. The material-filled line includes a first linear item and a second linear item separated by a separation area of the layer. The first linear item has a first line end where the first linear item contacts the separation area. The second linear item has a second line end where the second linear item contacts the separation area. The first line end and the second line end include line end openings (filled with a material) that increase critical dimension uniformity of the first line end and the second line end.

    Abstract translation: 使用本文中的方法形成的集成电路结构包括层和层中的材料填充线。 填充材料的线包括由层的分离区域分开的第一线性项和第二线性项。 第一线性项具有第一线端,其中第一线性项接触分离区。 第二线性项具有第二线端,其中第二线性项接触分离区。 第一线端和第二线端包括增加第一线端和第二线端的临界尺寸均匀性的线端开口(填充有材料)。

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