Method for forming a copper based metal pattern
    3.
    发明公开
    Method for forming a copper based metal pattern 失效
    Verfahren zum Herstellen eines Metallmusters auf Kupferbasis。

    公开(公告)号:EP0054663A1

    公开(公告)日:1982-06-30

    申请号:EP81108552.1

    申请日:1981-10-20

    IPC分类号: H05K3/06 H01L21/88

    摘要: A composite mask (5A, 6A) is formed by sequentially depositing blanket layers (5) and (6) of molybdenum and of a material respectively selected from the group consisting of MgO and Al 2 O 3 on the surface of a copper layer (3), and producing in these layers (5) and (6) a pattern of openings corresponding to the negative of the desired copper pattern (3). Using said mask (5A, 6A) the portions of copper layer (3) exposed in said openings are removed, preferably by dry etching. MgO or Al 2 O 3 adhere well to Mo and Mo adheres well to copper. The Mo layer (5A) also serves as a diffusion barrier'for the copper.
    The method is applicable in forming copper interconnect metallurgy for components such as semiconductor or dielectric substrates.

    摘要翻译: 复合掩模(5A,6A)通过在铜层(3)的表面上顺序地沉积钼和选自MgO和Al 2 O 3的材料的钼层和(6)层而形成,以及 在这些层(5)和(6)中产生对应于所需铜图案(3)的负极的开口图案。 使用所述掩模(5A,6A),优选通过干蚀刻去除在所述开口中暴露的铜层(3)的部分。 MgO或Al2O3很好地粘附到Mo和Mo附着到铜上。 Mo层(5A)也用作铜的扩散阻挡层。 ...该方法可用于形成用于诸如半导体或电介质基板的部件的铜互连冶金。