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    • 7. 发明授权
    • Method of manufacturing structure for connecting interconnect lines including metal layer with thickness larger than thickness of metallic compound layer
    • 制造包括厚度大于金属化合物层厚度的金属层的互连线的结构的制造方法
    • US06780769B2
    • 2004-08-24
    • US10464502
    • 2003-06-19
    • Masahiko FujisawaAkihiko OhsakiNoboru Morimoto
    • Masahiko FujisawaAkihiko OhsakiNoboru Morimoto
    • H01L2144
    • H01L21/76846H01L23/53238H01L2924/0002H01L2924/00
    • A metal layer (7), a metallic compound layer (8) and a metal layer (9) are stacked in this order when viewed from the side of a first copper interconnect line (2) and an interlayer insulating film (5) to constitute a second conductive barrier layer (20). As the material for the metal layers (7) and (9), an element having an atomic weight higher than that of copper such as tungsten (W) or tantalum (Ta) is applicable. A second copper interconnect line (6) is conductively connected to the first copper interconnect line (2) at a contact hole (12) through the second conductive barrier layer (20). As the ratio of the volume of the second copper interconnect line (6) at the region for filling a trench (11) to the volume of the second copper interconnect line (6) at the region for filling the contact hole (12) increases, tensile stress to be concentrated at the contact hole (12) becomes greater. As a result, a void is likely to be generated in the contact hole (12). In view of this, in order to improve the adhesion especially between the second copper interconnect line (6) at the region for filling the contact hole (12) and the second conductive barrier layer (20), the metal layer (9) is provided.
    • 从第一铜互连线(2)和层间绝缘膜(5)的侧面观察时,依次层叠金属层(7),金属化合物层(8)和金属层(9),构成 第二导电阻挡层(20)。 作为金属层(7)和(9)的材料,可以使用原子量高于诸如钨(W)或钽(Ta)的铜的元素。 第二铜互连线(6)通过第二导电阻挡层(20)在接触孔(12)处导电地连接到第一铜互连线(2)。 由于在填充接触孔(12)的区域处,用于填充沟槽(11)的区域处的第二铜互连线(6)的体积与第二铜互连线(6)的体积的比率增加, 要集中在接触孔(12)处的拉伸应力变大。 结果,在接触孔(12)中容易产生空隙。 鉴于此,为了改善在用于填充接触孔(12)的区域和第二导电阻挡层(20)之间的第二铜互连线(6)之间的粘合性,提供了金属层(9) 。
    • 9. 发明授权
    • Structure for connecting interconnect lines with interposed layer including metal layers and metallic compound layer
    • 用于连接具有包括金属层和金属化合物层的插入层的互连线的结构
    • US06624516B2
    • 2003-09-23
    • US09978005
    • 2001-10-17
    • Masahiko FujisawaAkihiko OhsakiNoboru Morimoto
    • Masahiko FujisawaAkihiko OhsakiNoboru Morimoto
    • H01L2348
    • H01L21/76846H01L23/53238H01L2924/0002H01L2924/00
    • A metal layer (7), a metallic compound layer (8) and a metal layer (9) are stacked in this order when viewed from the side of a first copper interconnect line (2) and an interlayer insulating film (5) to constitute a second conductive barrier layer (20). As the material for the metal layers (7) and (9), an element having an atomic weight higher than that of copper such as tungsten (W) or tantalum (Ta) is applicable. A second copper interconnect line (6) is conductively connected to the first copper interconnect line (2) at a contact hole (12) through the second conductive barrier layer (20). As the ratio of the volume of the second copper interconnect line (6) at the region for filling a trench (11) to the volume of the second copper interconnect line (6) at the region for filling the contact hole (12) increases, tensile stress to be concentrated at the contact hole (12) becomes greater. As a result, a void is likely to be generated in the contact hole (12). In view of this, in order to improve the adhesion especially between the second copper interconnect line (6) at the region for filling the contact hole (12) and the second conductive barrier layer (20), the metal layer (9) is provided.
    • 从第一铜互连线(2)和层间绝缘膜(5)的侧面观察时,依次层叠金属层(7),金属化合物层(8)和金属层(9),构成 第二导电阻挡层(20)。 作为金属层(7)和(9)的材料,可以使用原子量高于诸如钨(W)或钽(Ta)的铜的元素。 第二铜互连线(6)通过第二导电阻挡层(20)在接触孔(12)处导电地连接到第一铜互连线(2)。 由于在填充接触孔(12)的区域处,用于填充沟槽(11)的区域处的第二铜互连线(6)的体积与第二铜互连线(6)的体积的比率增加, 要集中在接触孔(12)处的拉伸应力变大。 结果,在接触孔(12)中容易产生空隙。 鉴于此,为了改善在用于填充接触孔(12)的区域和第二导电阻挡层(20)之间的第二铜互连线(6)之间的粘合性,提供了金属层(9) 。