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    • 34. 发明申请
    • Method for forming self-aligned contact in semiconductor device
    • 在半导体器件中形成自对准接触的方法
    • US20050239282A1
    • 2005-10-27
    • US10940772
    • 2004-09-15
    • Meng-Hung ChenShian-Jyh LinChia-Sheng Yu
    • Meng-Hung ChenShian-Jyh LinChia-Sheng Yu
    • H01L21/4763H01L21/60
    • H01L21/76897
    • A method for forming a self-aligned contact on a semiconductor substrate provided with a plurality of field-effect transistors. The method comprises the steps of forming a first insulating layer comprising a nitride along a profile of a gate structure and a junction region, forming a temporary layer comprising a doped oxide on the first insulating layer, removing a portion of the temporary layer by performing a selective etch of the oxide with a mask while leaving a plug portion of the temporary layer over the junction region, forming a second insulating layer comprising an undoped oxide in a region where the portion of the temporary layer is removed, removing the plug portion by performing a selective etch of the undoped oxide to form a contact hole, removing a portion of the first insulating layer at a bottom of the contact hole, and forming a conductive contact in the contact hole.
    • 一种用于在设置有多个场效应晶体管的半导体衬底上形成自对准接触的方法。 该方法包括以下步骤:沿着栅极结构和结区的轮廓形成包括氮化物的第一绝缘层,在第一绝缘层上形成包括掺杂氧化物的临时层,通过执行临时层去除一部分临时层 用掩模选择性地蚀刻氧化物,同时将临时层的插塞部分留在接合区域上,形成第二绝缘层,该第二绝缘层包括去除部分临时层的区域中的未掺杂的氧化物,通过执行 对未掺杂的氧化物进行选择性蚀刻以形成接触孔,在接触孔的底部除去第一绝缘层的一部分,以及在接触孔中形成导电接触。
    • 35. 发明申请
    • 3-stage method for forming deep trench structure and deep trench capacitor
    • 形成深沟槽结构和深沟槽电容器的3阶段方法
    • US20050221616A1
    • 2005-10-06
    • US10816820
    • 2004-04-05
    • Meng-Hung ChenShian-Jyh Lin
    • Meng-Hung ChenShian-Jyh Lin
    • B44C1/22H01L21/308H01L21/311H01L21/334H01L21/8242
    • H01L29/66181H01L21/3081H01L27/1087
    • A method for forming a deep trench structure comprises the steps of providing a silicon substrate; forming a mask layer of a predetermined pattern on the silicon substrate to expose a portion of the silicon substrate; forming a first trench in the exposed portion of the silicon substrate, the first trench having a first depth; forming a nitride layer on the surfaces of the whole structure; forming a second trench in the first trench downward, the second trench having a second depth greater than the first depth; forming another nitride layer on the surfaces of the whole structure; and forming a third trench in the second trench downward, the third trench having a third depth greater than the second depth. The method of the present invention can make the whole trench have better etch uniformity, thereby obtaining good electrical performance.
    • 形成深沟槽结构的方法包括以下步骤:提供硅衬底; 在所述硅衬底上形成预定图案的掩模层以暴露所述硅衬底的一部分; 在所述硅衬底的暴露部分中形成第一沟槽,所述第一沟槽具有第一深度; 在整个结构的表面上形成氮化物层; 在所述第一沟槽中形成第二沟槽,所述第二沟槽具有大于所述第一深度的第二深度; 在整个结构的表面上形成另一个氮化物层; 以及在所述第二沟槽中向下形成第三沟槽,所述第三沟槽的第三深度大于所述第二深度。 本发明的方法可以使整个沟槽具有更好的蚀刻均匀性,从而获得良好的电性能。