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    • 3. 发明授权
    • Phase changeable memory cell array region and method of forming the same
    • 相变存储单元阵列区域及其形成方法
    • US08039298B2
    • 2011-10-18
    • US12617782
    • 2009-11-13
    • Hyeong-Geun AnHideki HoriiSang-Yeol Kang
    • Hyeong-Geun AnHideki HoriiSang-Yeol Kang
    • H01L21/06H01L21/00G11C11/00
    • H01L45/144H01L27/2436H01L27/2472H01L45/06H01L45/1233H01L45/126H01L45/1293H01L45/165H01L45/1666
    • A phase changeable memory cell array region includes a lower interlayer insulating layer disposed on a semiconductor substrate. The region also includes a plurality of conductive plugs disposed through the lower interlayer insulating layer. The region also includes a phase changeable material pattern operably disposed on the lower interlayer insulating layer, the phase changeable pattern covering at least two of the plurality of conductive plugs, wherein the phase changeable material pattern includes a plurality of first regions in contact with one or more of the plurality of conductive plugs and at least one second region interposed between the plurality of the first regions, wherein the at least one second region has a lower thermal conductivity than the plurality of first regions. The phase changeable memory cell array region also includes an upper interlayer insulating layer covering at least one of the phase changeable material pattern and the lower interlayer insulating layer. The region also includes conductive patterns disposed through the upper interlayer insulating layer and electrically connected to a plurality of predetermined regions of the plurality of first regions.
    • 相变存储单元阵列区域包括设置在半导体衬底上的下层间绝缘层。 该区域还包括穿过下层间绝缘层设置的多个导电插塞。 所述区域还包括可操作地设置在所述下层间绝缘层上的可相变材料图案,所述相变图案覆盖所述多个导电插塞中的至少两个,其中所述相变材料图案包括多个与第 多个导电插塞中的多个和插入在多个第一区域之间的至少一个第二区域,其中至少一个第二区域具有比多个第一区域更低的热导率。 相变存储单元阵列区域还包括覆盖相变材料图案和下层间绝缘层中的至少一个的上层间绝缘层。 该区域还包括通过上层间绝缘层设置并电连接到多个第一区域中的多个预定区域的导电图案。
    • 9. 发明授权
    • FRAM and method of fabricating the same
    • FRAM及其制造方法
    • US06686620B2
    • 2004-02-03
    • US10109432
    • 2002-03-27
    • Hyeong-Geun AnSoon-Oh Park
    • Hyeong-Geun AnSoon-Oh Park
    • H01L27108
    • H01L28/65H01L27/10852H01L27/10882H01L28/57
    • A FRAM having a ferroelectric capacitor comprises a cylindrical type bottom electrode. A ferroelectric film is thinly stacked over the bottom electrode, and the first portion of the top electrode formed over and conformal to the ferroelectric film. A void that is left between sidewalls of the first portion of the electrode over the ferroelectric film is then filled with fill material for a fill layer. The fill material of the fill layer is then planarized to be level with and expose an upper surface of the first portion of the top electrode. A second portion of the top electrode is then formed over the fill layer and in contact with the exposed, e.g. peripheral regions of the first portion of the electrode. The fill material of the fill layer may be formed of polysilicon, silicon oxide or other material such as another metal. Additionally, the fill layer may be formed of a fill material that has a superior gap fill capability or of a material that has a low stress relationship with respect to the capacitor's top metal.
    • 具有铁电电容器的FRAM包括圆柱形底部电极。 铁电体薄膜层叠在底部电极上,并且顶部电极的第一部分形成在铁电膜上并与其形成共形。 然后,在铁电体膜上的电极的第一部分的侧壁之间留下的空隙填充有用于填充层的填充材料。 然后将填充层的填充材料平坦化以与顶部电极的第一部分的上表面平齐并暴露。 然后,顶部电极的第二部分形成在填充层之上并与暴露的例如电极接触。 电极的第一部分的周边区域。 填充层的填充材料可以由多晶硅,氧化硅或其它材料例如另一种金属形成。 另外,填充层可以由具有优异间隙填充能力的填充材料或与电容器的顶部金属具有低应力关系的材料形成。