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    • 1. 发明授权
    • Mask schemes for patterning magnetic tunnel junctions
    • 用于图案化磁隧道结的掩模方案
    • US07001783B2
    • 2006-02-21
    • US10868328
    • 2004-06-15
    • Gregory CostriniFrank FindeisGill Yong LeeChanro Park
    • Gregory CostriniFrank FindeisGill Yong LeeChanro Park
    • H01L21/00
    • H01L43/12B82Y10/00H01L27/228
    • Methods of patterning magnetic tunnel junctions (MTJ's) of magnetic memory devices that avoid shorting magnetic memory cells to upper levels of conductive lines during etching processes. One method involves using a hard mask having two material layers to pattern the lower magnetic material layers of an MTJ. The first material of the hard mask is thin and comprises an etch-resistant material. The second material of the hard mask deposited over the first material is thicker and is less etch-resistant than the first material. At least a portion of the second material is sacrificially removed during the etch process of the lower magnetic material layers. A conformal or non-conformal material may be used as the second material of the hard mask. The hard mask used to pattern lower magnetic materials of an MTJ may comprise a single layer of non-conformal material.
    • 磁记录装置的磁隧道结(MTJ)的图案化方法,可避免在刻蚀过程中将磁存储单元短路到上层的导线。 一种方法包括使用具有两个材料层的硬掩模来图案化MTJ的下部磁性材料层。 硬掩模的第一种材料是薄的并且包括耐蚀刻材料。 沉积在第一材料上的硬掩模的第二材料比第一材料更厚并且耐蚀刻性更差。 在下磁性材料层的蚀刻过程期间,至少部分第二材料被牺牲地去除。 可以使用保形或非保形材料作为硬掩模的第二材料。 用于图形MTJ的较低磁性材料的硬掩模可以包括单层非保形材料。
    • 5. 发明授权
    • Silicon oxynitride cap for fluorinated silicate glass film in intermetal dielectric semiconductor fabrication
    • 用于氟化硅玻璃膜的氮氧化硅帽在金属间电介质半导体制造中
    • US06300672B1
    • 2001-10-09
    • US09120630
    • 1998-07-22
    • Gill Yong Lee
    • Gill Yong Lee
    • H01L2358
    • H01L21/02131H01L21/0214H01L21/02211H01L21/02274H01L21/02304H01L21/02362H01L21/3145H01L21/31629H01L21/76801H01L21/76802H01L21/76829H01L23/3192H01L23/5329H01L2924/0002H01L2924/12044H01L2924/00
    • A semiconductor device and method of forming a patterned conductive layer on a semiconductor substrate are provided so as to prevent fluorine substance outflow from a fluorinated silicate glass (FSG) layer thereon and simultaneously so as to suppress back reflection of light waves into a photoresist layer during photolithographic processing. The substrate is coated in turn with a conductive layer, a dielectric (e.g., silicon dioxide) liner, a FSG layer, a silicon oxynitride layer preventing fluorine substance outflow therethrough from the FSG layer and also forming an antireflective coating (ARC), and a photoresist layer. The photoresist layer is exposed and developed to uncover pattern portions of the underlying silicon oxynitride layer. The uncovered pattern portions of the silicon oxynitride ARC layer and corresponding underlying portions of the FSG layer and dielectric liner are then removed, e.g., by a single dry etching step, to expose pattern portions of the conductive layer for metallization. Upon metallization, the substrate is provided with a combination of the FSG layer and silicon oxynitride layer, in which the silicon oxynitride layer prevents fluorine substance outflow therethrough from the underlying FSG layer to an overlying conductive layer.
    • 提供半导体器件和在半导体衬底上形成图案化导电层的方法,以防止氟物质从其上的氟化硅酸盐玻璃(FSG)层流出,并同时抑制光波反射到光致抗蚀剂层中 光刻处理。 依次用导电层,电介质(例如,二氧化硅)衬垫,FSG层,氮氧化硅层涂覆衬底,防止氟物质从FSG层流出并形成抗反射涂层(ARC),以及 光致抗蚀剂层。 光致抗蚀剂层被曝光和显影以露出下面的氮氧化硅层的图案部分。 然后例如通过单次干蚀刻步骤去除氮氧化硅ARC层的未覆盖图案部分和FSG层和电介质衬垫的相应的下部,以暴露用于金属化的导电层的图案部分。 在金属化时,基板设置有FSG层和氮氧化硅层的组合,其中氧氮化硅层防止氟物质从下面的FSG层流出到上覆的导电层。