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    • 4. 发明申请
    • TECHNIQUES FOR BOTTOM-UP FILLING OF THREE-DIMENSIONAL SEMICONDUCTOR DEVICE TOPOGRAPHIES
    • 三维半导体器件拓扑图的底部填充技术
    • WO2017052610A1
    • 2017-03-30
    • PCT/US2015/052304
    • 2015-09-25
    • INTEL CORPORATION
    • KLOSTER, Grant M.GSTREIN, FlorianCLENDENNING, Scott B.HOURANI, RamiFRASURE, Kent N.
    • H01L29/78H01L21/336
    • H01L29/41791H01L21/823821H01L21/823842H01L29/66795H01L29/785
    • Techniques are disclosed for bottom-up filling of semiconductor device topographies. In accordance with some embodiments, a seed layer may be formed over a bottom surface of a feature patterned in a dielectric layer. The seed layer may be, for example, a work function metal (WFM) layer or a barrier layer. In accordance with some embodiments, the fill metal may be, at least initially, selectively deposited over only the seed layer, and as deposition continues, the fill metal may grow to fill the feature from bottom to top, in some cases with no seam or void formed therein. Optional selective passivation of the sidewalls of the feature (or other layer therein) may inhibit fill metal deposition on those surfaces, facilitating selective deposition. In accordance with some embodiments, an etch and recess process that utilizes a sacrificial fill material may be used in forming the seed layer at the feature bottom.
    • 公开了用于半导体器件拓扑图的自底向上填充的技术。 根据一些实施例,种子层可以形成在图案化在介电层中的特征的底表面上。 种子层可以是例如功函数金属(WFM)层或阻挡层。 根据一些实施例,填充金属可以至少最初选择性地沉积在种子层上,并且随着沉积的继续,填充金属可以生长以从底部到顶部填充该特征,在一些情况下,没有接缝或 形成空隙。 特征(或其中的其他层)的侧壁的任选的选择性钝化可以抑制这些表面上的填充金属沉积,促进选择性沉积。 根据一些实施例,利用牺牲填充材料的蚀刻和凹陷工艺可用于在特征底部形成种子层。