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    • 8. 发明申请
    • SELECTIVE ETCH OF SILICON BY WAY OF METASTABLE HYDROGEN TERMINATION
    • 用可变氢终止方式选择性蚀刻硅
    • WO2013052712A3
    • 2013-06-20
    • PCT/US2012058818
    • 2012-10-04
    • APPLIED MATERIALS INCWANG ANCHUANZHANG JINGCHUNINGLE NITIN KLEE YOUNG S
    • WANG ANCHUANZHANG JINGCHUNINGLE NITIN KLEE YOUNG S
    • H01L21/3065
    • H01L21/3065H01J37/32357H01L21/3081H01L21/32137
    • Methods of etching exposed silicon on patterned heterogeneous structures is described and includes a remote plasma etch formed from a fluorine-containing precursor and a hydrogen-containing precursor. Plasma effluents from the remote plasma are flowed into a substrate processing region where the plasma effluents react with the exposed regions of silicon. The plasmas effluents react with the patterned heterogeneous structures to selectively remove silicon while very slowly removing other exposed materials. The silicon selectivity results, in part, from a preponderance of hydrogen-containing precursor in the remote plasma which hydrogen terminates surfaces on the patterned heterogeneous structures. A much lower flow of the fluorine-containing precursor progressively substitutes fluorine for hydrogen on the hydrogen-terminated silicon thereby selectively removing silicon from exposed regions of silicon. The methods may be used to selectively remove silicon far faster than silicon oxide, silicon nitride and a variety of metal-containing materials.
    • 描述了在图案化的异质结构上蚀刻暴露的硅的方法,并且包括由含氟前体和含氢前体形成的远程等离子体蚀刻。 来自远程等离子体的等离子体流出物流入衬底处理区域,在衬底处理区域中,等离子体流出物与硅的暴露区域反应。 等离子体流出物与图案化的异质结构反应以选择性地去除硅,同时非常缓慢地去除其他暴露的材料。 硅选择性的结果部分来自远程等离子体中含氢前体的优势,其中氢终止于图案化的异质结构上的表面。 含氟前体的流量低得多,以逐渐将氟取代为氢封端的硅上的氢,从而从硅的暴露区域选择性地除去硅。 这些方法可用于选择性地去除硅,其速度比氧化硅,氮化硅和各种含金属材料快得多。
    • 9. 发明申请
    • SELECTIVE SUPPRESSION OF DRY-ETCH RATE OF MATERIALS CONTAINING BOTH SILICON AND NITROGEN
    • 选择性抑制含有硅和氮的材料的干燥速率
    • WO2013033527A3
    • 2013-04-25
    • PCT/US2012053329
    • 2012-08-31
    • APPLIED MATERIALS INCWANG YUNYUWANG ANCHUANZHANG JINGCHUNINGLE NITIN KLEE YOUNG S
    • WANG YUNYUWANG ANCHUANZHANG JINGCHUNINGLE NITIN KLEE YOUNG S
    • H01L21/3065
    • H01L21/3065H01J37/32357H01J37/32449H01L21/32137
    • A method of suppressing the etch rate for exposed silicon-and-nitrogen-containing material on patterned heterogeneous structures is described and includes a two stage remote plasma etch. The etch selectivity of silicon relative to silicon nitride and other silicon-and-nitrogen-containing material is increased using the method. The first stage of the remote plasma etch reacts plasma effluents with the patterned heterogeneous structures to form protective solid by-product on the silicon-and-nitrogen-containing material. The plasma effluents of the first stage are formed from a remote plasma of a combination of precursors, including nitrogen trifluoride and hydrogen (H2). The second stage of the remote plasma etch also reacts plasma effluents with the patterned heterogeneous structures to selectively remove material which lacks the protective solid by-product. The plasma effluents of the second stage are formed from a remote plasma of a fluorine-containing precursor.
    • 描述了抑制图案化异质结构上暴露的含硅和氮的材料的蚀刻速率的方法,并且包括两级远程等离子体蚀刻。 使用该方法,硅相对于氮化硅和其它含硅和氮的材料的蚀刻选择性增加。 远程等离子体蚀刻的第一阶段使等离子体流出物与图案化的异质结构反应,以在含硅和氮的材料上形成保护性固体副产物。 第一级的等离子体流出物由包括三氟化氮和氢气(H 2)在内的前体组合的远程等离子体形成。 远程等离子体蚀刻的第二阶段还使等离子体流出物与图案化的异质结构反应,以选择性地除去缺乏保护性固体副产物的材料。 第二级的等离子体流出物由含氟前体的远程等离子体形成。