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    • 21. 发明申请
    • Method of depositing a diffusion barrier layer and a metal conductive layer
    • 沉积扩散阻挡层和金属导电层的方法
    • US20050020080A1
    • 2005-01-27
    • US10922052
    • 2004-08-18
    • Tony ChiangGongda YaoPeijun DingFusen ChenBarry ChinGene KoharaZheng XuHong Zhang
    • Tony ChiangGongda YaoPeijun DingFusen ChenBarry ChinGene KoharaZheng XuHong Zhang
    • H01L21/285H01L21/768H01L21/4763H01L21/302H01L21/461
    • H01L21/76843C23C14/046C23C14/165H01L21/2855H01L21/76805H01L21/76844H01L21/76846H01L21/76862H01L21/76865H01L21/76871H01L21/76877H01L21/76879H01L21/76883
    • We disclose a method of applying a sculptured layer of material on a semiconductor feature surface using ion deposition sputtering, wherein a surface onto which the sculptured layer is applied is protected to resist erosion and contamination by impacting ions of a depositing layer, said method comprising the steps of: a) applying a first portion of a sculptured layer with sufficiently low substrate bias that a surface onto which said sculptured layer is applied is not eroded away or contaminated in an amount which is harmful to said semiconductor device performance or longevity; and b) applying a subsequent portion of said sculptured layer with sufficiently high substrate bias to sculpture a shape from said the first portion, while depositing additional layer material. The method is particularly applicable to the sculpturing of barrier layers, wetting layers, and conductive layers upon semiconductor feature surfaces and is especially helpful when the conductive layer is copper. In the application of a barrier layer, a first portion of barrier layer material is deposited on the substrate surface using standard sputtering techniques or using all ion deposition plasma, but in combination with sufficiently low substrate bias voltage (including at no applied substrate voltage) that the surfaces impacted by ions are not sputtered in an amount which is harmful to device performance or longevity. Subsequently, a second portion of barrier material is applied using ion deposition sputtering at increased substrate bias voltage which causes resputtering (sculpturing) or the first portion of barrier layer material, while enabling a more anisotropic deposition of newly depositing material. A conductive material, and particularly a copper seed layer applied to the feature may be accomplished using the same sculpturing technique as that described above with reference to the barrier layer.
    • 我们公开了使用离子沉积溅射在半导体特征表面上施加雕刻层的材料的方法,其中施加有雕刻层的表面被保护以通过冲击沉积层的离子来抵抗侵蚀和污染,所述方法包括 步骤:a)以足够低的衬底偏压施加雕刻层的第一部分,使得施加所述雕刻层的表面不会以对所述半导体器件的性能或寿命有害的量被侵蚀或污染; 以及b)将所述雕刻层的后续部分施加足够高的衬底偏压,以从所述第一部分雕刻形状,同时沉积附加层材料。 该方法特别适用于在半导体特征表面上雕刻阻挡层,润湿层和导电层,并且当导电层是铜时尤其有用。 在施加阻挡层时,使用标准溅射技术或使用所有离子沉积等离子体将阻挡层材料的第一部分沉积在衬底表面上,但是与足够低的衬底偏置电压(包括没有施加的衬底电压)相结合, 受离子影响的表面不会以对器件性能或寿命有害的量溅射。 随后,使用离子沉积溅射以增加的衬底偏置电压施加阻挡材料的第二部分,其引起再溅射(雕刻)或阻挡层材料的第一部分,同时能够进行更多的各向异性沉积新沉积材料。 应用于特征的导电材料,特别是铜种子层可以使用与上述参考阻挡层所述相同的雕刻技术来实现。
    • 25. 发明授权
    • Silicon-doped titanium wetting layer for aluminum plug
    • 用于铝插头的掺硅钛润湿层
    • US06232665B1
    • 2001-05-15
    • US09328117
    • 1999-06-08
    • Gongda YaoPeijun DingZheng XuHoa Kieu
    • Gongda YaoPeijun DingZheng XuHoa Kieu
    • H01L2348
    • H01L21/76843H01L21/76882H01L23/485H01L23/5226H01L2924/0002H01L2924/00
    • A process for fabricating metal plugs, such as aluminum plugs, in a semiconductor workpiece. The invention is suitable for filling narrow, high aspect ratio holes, and the invention minimizes the formation of TiAl3 or other products of interdiffusion between the plug and the wetting layer. First, an optional barrier layer is created by covering the bottom of a hole with a film containing titanium nitride doped with silicon. Second, a wetting layer is created by covering the side walls of a hole with a film containing titanium doped with silicon, in a Ti:Si molar ratio greater than 1:2. Preferably, the wetting layer is created by sputter deposition using a titanium sputtering target containing 0.1% to 20% wt silicon, most preferably 5% to 10% wt silicon. Third, the hole is filled by depositing a material consisting primarily of aluminum. The hole preferably is filled by sputter deposition using an aluminum sputtering target, optionally containing dopants such as copper. To facilitate filling the hole without voids, the aluminum sputter deposition preferably is performed “warm”, i.e., with the workpiece at a temperature below the melting point of aluminum but high enough to promote reflow of the deposited material. The silicon atoms in the wetting layer inhibit the titanium from reacting with the aluminum, and the wetting layer facilitates filling the hole with the aluminum material without leaving unfilled voids.
    • 一种用于在半导体工件中制造诸如铝塞的金属插头的工艺。 本发明适用于填充狭窄的高纵横比孔,并且本发明使塞子和润湿层之间的TiAl 3或其他相互扩散产物的形成最小化。 首先,通过用含有掺杂硅的氮化钛的膜覆盖孔的底部来产生可选的阻挡层。 第二,通过用含有掺杂硅的钛的膜覆盖孔的侧壁,Ti:Si摩尔比大于1:2产生润湿层。 优选地,通过使用含有0.1重量%至20重量%硅,最优选5重量%至10重量%硅的钛溅射靶的溅射沉积来产生润湿层。 第三,通过沉积主要由铝构成的材料填充孔。 优选地,通过使用铝溅射靶的溅射沉积来填充孔,任选地含有诸如铜的掺杂剂。 为了方便填充孔而没有空隙,铝溅射沉积优选地进行“暖”,即工件在低于铝的熔点的温度下,但足够高以促进沉积材料的回流。 润湿层中的硅原子阻止钛与铝反应,并且润湿层有助于用铝材料填充孔而不留下未填充的空隙。
    • 26. 发明授权
    • Silicon-doped titanium wetting layer for aluminum plug
    • 用于铝插头的掺硅钛润湿层
    • US5911113A
    • 1999-06-08
    • US820512
    • 1997-03-18
    • Gongda YaoPeijun DingZheng XuHoa Kieu
    • Gongda YaoPeijun DingZheng XuHoa Kieu
    • H01L21/28H01L21/285H01L21/3205H01L21/768H01L23/485H01L23/52H01L23/522
    • H01L21/76843H01L21/76882H01L23/485H01L23/5226H01L2924/0002
    • A process for fabricating metal plugs, such as aluminum plugs, in a semiconductor workpiece. The invention is suitable for filling narrow, high aspect ratio holes, and the invention minimizes the formation of TiAl3 or other products of interdiffusion between the plug and the wetting layer. First, an optional barrier layer is created by covering the bottom of a hole with a film containing titanium nitride doped with silicon. Second, a wetting layer is created by covering the side walls of a hole with a film containing titanium doped with silicon, in a Ti:Si molar ratio greater than 1:2. Preferably, the wetting layer is created by sputter deposition using a titanium sputtering target containing 0.1% to 20% wt silicon, most preferably 5% to 10% wt silicon. Third, the hole is filled by depositing a material consisting primarily of aluminum. The hole preferably is filled by sputter deposition using an aluminum sputtering target, optionally containing dopants such as copper. To facilitate filling the hole without voids, the aluminum sputter deposition preferably is performed "warm", i.e., with the workpiece at a temperature below the melting point of aluminum but high enough to promote reflow of the deposited material. The silicon atoms in the wetting layer inhibit the titanium from reacting with the aluminum, and the wetting layer facilitates filling the hole with the aluminum material without leaving unfilled voids.
    • 一种用于在半导体工件中制造诸如铝塞的金属插头的工艺。 本发明适用于填充狭窄的高纵横比孔,并且本发明使塞子和润湿层之间的TiAl 3或其他相互扩散产物的形成最小化。 首先,通过用含有掺杂硅的氮化钛的膜覆盖孔的底部来产生可选的阻挡层。 第二,通过用含有掺杂硅的钛的膜覆盖孔的侧壁,Ti:Si摩尔比大于1:2产生润湿层。 优选地,通过使用含有0.1重量%至20重量%硅,最优选5重量%至10重量%硅的钛溅射靶的溅射沉积来产生润湿层。 第三,通过沉积主要由铝构成的材料填充孔。 优选地,通过使用铝溅射靶的溅射沉积来填充孔,任选地含有诸如铜的掺杂剂。 为了方便填充孔而没有空隙,铝溅射沉积优选地进行“暖”,即工件在低于铝的熔点的温度下,但足够高以促进沉积材料的回流。 润湿层中的硅原子阻止钛与铝反应,并且润湿层有助于用铝材料填充孔而不留下未填充的空隙。