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    • 15. 发明授权
    • Phase change memory devices and their methods of fabrication
    • 相变存储器件及其制造方法
    • US07598112B2
    • 2009-10-06
    • US11392310
    • 2006-03-28
    • Jae-Hyun ParkJae-Hee OhSe-Ho LeeWon-Cheol Jeong
    • Jae-Hyun ParkJae-Hee OhSe-Ho LeeWon-Cheol Jeong
    • H01L29/04
    • H01L45/144H01L27/2409H01L27/2463H01L45/06H01L45/1233H01L45/126H01L45/1666
    • In an embodiment, a phase change memory device includes a semiconductor substrate of a first conductivity type and a first interlayer insulating layer disposed on the semiconductor substrate. A hole penetrates the first interlayer insulating layer. A first and a second semiconductor pattern are sequentially stacked in a lower region of the hole. A cell electrode is provided on the second semiconductor pattern. The cell electrode has a lower surface than a top surface of the first interlayer insulating layer. A confined phase change material pattern fills the hole on the cell electrode. An upper electrode is disposed on the phase change material pattern. The phase change material pattern in the hole is self-aligned with the first and second semiconductor patterns by the hole. A method of fabricating the phase change memory device is also provided.
    • 在一个实施例中,相变存储器件包括第一导电类型的半导体衬底和设置在半导体衬底上的第一层间绝缘层。 一个孔穿透第一层间绝缘层。 第一和第二半导体图案顺序地堆叠在孔的下部区域中。 电池电极设置在第二半导体图案上。 电池电极具有比第一层间绝缘层的顶表面更低的表面。 限制的相变材料图案填充电池电极上的孔。 上电极设置在相变材料图案上。 孔中的相变材料图案通过孔与第一和第二半导体图案自对准。 还提供了一种制造相变存储器件的方法。
    • 20. 发明申请
    • Methods of forming fine patterns, and methods of forming trench isolation layers using the same
    • 形成精细图案的方法以及使用其形成沟槽隔离层的方法
    • US20070059934A1
    • 2007-03-15
    • US11519081
    • 2006-09-11
    • Jae-Hyun ParkJae-Hee OhSe-Ho LeeWon-Cheol Jeong
    • Jae-Hyun ParkJae-Hee OhSe-Ho LeeWon-Cheol Jeong
    • H01L21/302
    • H01L21/32139H01L21/3086H01L21/3088H01L21/76224H01L21/76229H01L21/76838
    • Methods of forming a fine pattern include forming an underlying layer on a substrate, forming preliminary hard mask patterns having a first pitch on the underlying layer, the preliminary hard mask patterns having a first width and being spaced apart from each other by a second width smaller than the first width. The underlying layer is etched using the preliminary hard mask patterns as etch masks to thereby form preliminary underlying patterns. The preliminary hard mask patterns are pulled back, thereby forming hard mask patterns on the preliminary underlying patterns. An overlayer is formed on the substrate exposing top surfaces of the hard mask patterns. The hard mask patterns and the preliminary underlying patterns disposed below the hard mask patterns are etched using the overlayer as an etch mask, thereby forming underlying patterns having a second pitch smaller than the first pitch, and the overlayer is removed.
    • 形成精细图案的方法包括在基板上形成下层,在下层上形成具有第一间距的初步硬掩模图案,初步硬掩模图案具有第一宽度并且彼此间隔开第二宽度较小 比第一宽。 使用初步硬掩模图案作为蚀刻掩模蚀刻下层,从而形成初步的底层图案。 初步硬掩模图案被拉回,从而在初始底层图案上形成硬掩模图案。 在基板上形成覆盖层,暴露硬掩模图案的顶表面。 使用覆盖层作为蚀刻掩模蚀刻设置在硬掩模图案之下的硬掩模图案和初始底层图案,由此形成具有小于第一间距的第二间距的下面的图案,并且去除覆盖层。