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    • 6. 发明授权
    • STI scheme to prevent fox recess during pre-CMP HF dip
    • STI方案,以防止在前CMP HF浸渍期间的狐狸凹陷
    • US06673695B1
    • 2004-01-06
    • US10062657
    • 2002-02-01
    • Victor Seng-Keong LimPaul Proctor
    • Victor Seng-Keong LimPaul Proctor
    • H01L2176
    • H01L21/76229H01L21/76224
    • A new method is provided for the creation of STI regions. STI trenches are created in the surface of a substrate following conventional processing. A layer of STI oxide is deposited and, using an exposure mask that is a reverse mask of the mask that is used to create the STI pattern, impurity implants are performed into the surface of the deposited layer of STI oxide. In view of these processing conditions, the layer of STI oxide overlying the patterned layer of etch stop material is exposed to the impurity implants. This exposure alters the etch characteristics of the deposited layer of STI oxide where this STI oxide overlies the patterned layer of etch stop material. The etch rate of the impurity exposed STI oxide is increased by the impurity implantation, resulting in an etch overlying the patterned etch stop layer that proceeds considerably faster than the etch of the STI oxide that is deposited overlying the created STI trenches. With the significantly faster etch of the STI oxide where this oxide has been exposed to impurity implantation, the STI oxide removal can be equalized between the STI oxide that overlies the patterned etch stop layer and the oxide that has been deposited over the STI trenches.
    • 为创建STI区域提供了一种新方法。 在常规处理之后,在衬底的表面中产生STI沟槽。 沉积一层STI氧化物,并且使用作为用于产生STI图案的掩模的反掩模的曝光掩模,将杂质植入物进行到STI氧化物沉积层的表面。 鉴于这些处理条件,覆盖图案化的蚀刻停止材料层的STI氧化物层暴露于杂质注入。 该曝光改变STI氧化物沉积层的蚀刻特性,其中该STI氧化物覆盖在图案化的蚀刻停止材料层上。 通过杂质注入,杂质暴露的STI氧化物的蚀刻速率增加,导致覆盖图案化的蚀刻停止层的蚀刻显着快于沉积在所创建的STI沟槽上的STI氧化物的蚀刻。 通过对这种氧化物暴露于杂质注入的STI氧化物的显着更快的蚀刻,可以在覆盖图案化蚀刻停止层的STI氧化物和已经沉积在STI沟槽上的氧化物之间均衡STI氧化物去除。
    • 10. 发明授权
    • Pre STI-CMP planarization scheme
    • 预STI-CMP平坦化方案
    • US06664190B2
    • 2003-12-16
    • US09951916
    • 2001-09-14
    • Feng ChenCheng-Hou LohPaul Proctor
    • Feng ChenCheng-Hou LohPaul Proctor
    • H01L21311
    • H01L21/76229H01L21/31053
    • A new method of forming shallow trench isolations using a reverse mask process is described. A polish stop layer is deposited on the surface of a substrate. An etch stop layer is deposited overlying the polish stop layer. A plurality of isolation trenches is etched through the etch stop layer and the polish stop layer into the substrate whereby narrow active areas and wide active areas of the substrate are left between the isolation trenches. An oxide layer is deposited over the etch stop layer and within the isolation trenches. The oxide layer is covered with a mask in the narrow active areas and in the isolation trenches and etched away in the wide active areas stopping at the etch stop layer. Thereafter, the mask is removed and the etch stop layer is polished away to the polish stop layer whereby the oxide layer in the isolation trenches is planarized.
    • 描述了使用反掩模工艺形成浅沟槽隔离的新方法。 抛光停止层沉积在基底的表面上。 沉积在抛光停止层上的蚀刻停止层。 通过蚀刻停止层和抛光停止层将多个隔离沟槽蚀刻到衬底中,由此衬底的有源区域和宽的有源区域留在隔离沟槽之间。 氧化物层沉积在蚀刻停止层上方和隔离沟槽内。 在狭窄的有源区域和隔离沟槽中用掩模覆盖氧化物层,并在停止在蚀刻停止层处的宽有效区域中被蚀刻掉。 此后,去除掩模,并将蚀刻停止层抛光到抛光停止层,由此隔离沟槽中的氧化物层被平坦化。