CVD/PVD method of filling structures using discontinuous CVD AL liner
    1.
    发明授权
    CVD/PVD method of filling structures using discontinuous CVD AL liner 失效
    使用不连续CVD AL衬垫填充结构的CVD / PVD方法

    公开(公告)号:US6057236A

    公开(公告)日:2000-05-02

    申请号:US105644

    申请日:1998-06-26

    摘要: Improved methods for forming metal-filled structures in openings on substrates for integrated circuit devices are obtained by the formation of a discontinuous metal liner by CVD in an opening to be filled. The discontinuous metal liner surprisingly provides wetting equivalent to or better than continuous layer CVD liners. The CVD step is followed by depositing a further amount of metal by physical vapor deposition over the discontinuous layer in the opening, and reflowing the further amount of metal to obtain the metal-filled structure.The interior surface of the opening is preferably a conductive material such as titanium nitride. Preferably, the discontinuous metal layer is made of aluminum. The metal deposited by PVD is preferably aluminum or an aluminum alloy. The methods of the invention are especially useful for the filling of contact holes, damascene trenches and dual damascene trenches. The methods of the invention are especially useful for filling structures having an opening width less than 250 nm.

    摘要翻译: 通过在待填充的开口中通过CVD形成不连续的金属衬垫来获得用于在集成电路器件的衬底上的开口中形成金属填充结构的改进方法。 不连续的金属衬垫令人惊讶地提供了与连续层CVD衬垫相当或更好的润湿。 CVD步骤之后,通过在开口中的不连续层上的物理气相沉积沉积更多量的金属,再回流另外的金属以获得填充金属的结构。 开口的内表面优选为诸如氮化钛的导电材料。 优选地,不连续金属层由铝制成。 通过PVD沉积的金属优选为铝或铝合金。 本发明的方法对于填充接触孔,镶嵌沟槽和双镶嵌沟槽特别有用。 本发明的方法对于填充具有小于250nm的开口宽度的结构特别有用。

    OXIDIZED TANTALUM NITRIDE AS AN IMPROVED HARDMASK IN DUAL-DAMASCENE PROCESSING
    7.
    发明申请
    OXIDIZED TANTALUM NITRIDE AS AN IMPROVED HARDMASK IN DUAL-DAMASCENE PROCESSING 审中-公开
    氧化氮化钛作为双重加工过程中改进的硬质合金

    公开(公告)号:US20050208742A1

    公开(公告)日:2005-09-22

    申请号:US10708648

    申请日:2004-03-17

    摘要: A method of producing an oxidized tantalum nitride (TaOxNx) hardmask layer for use in dual-damascene processing is described. Fine-line dual-damascene processing places competing, conflicting demands on the hardmask. Whereas critical dimension control needs a thicker hardmask, optical lithographic alignment is frustrated by the opacity of thick tantalum nitride (TaN). The technique solves the problem of TaN hardmask opacity with increasing thickness by oxidizing the TaN layer. Oxidation of the TaN hardmask increases the thickness of the hardmask to two to four times its original thickness and simultaneously increases its transparency by greater than ten times. This permits better CD control associated with a thicker hardmask while facilitating optical lithographic alignment.

    摘要翻译: 描述了用于双镶嵌加工的氧化氮化钽(TaO x N N N x S)硬掩模层的制造方法。 精细的双镶嵌加工对硬掩模产生了竞争,冲突的要求。 尽管临界尺寸控制需要较厚的硬掩模,但由于厚氮化钽(TaN)的不透明度,光学平版印刷对挫败感到沮丧。 该技术通过氧化TaN层来解决厚度增加的TaN硬掩模不透明度问题。 TaN硬掩模的氧化将硬掩模的厚度增加到其原始厚度的两到四倍,同时将其透明度提高了十倍以上。 这允许与更厚的硬掩模相关联的更好的CD控制,同时促进光学光刻对准。