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    • 42. 发明申请
    • METHODS OF MANUFACTURING SEMICONDUCTOR DEVICES
    • 制造半导体器件的方法
    • US20090203188A1
    • 2009-08-13
    • US12133772
    • 2008-06-05
    • Dong-woon ShinTai-su ParkSi-young ChoiSoo-jin HongMi-jin Kim
    • Dong-woon ShinTai-su ParkSi-young ChoiSoo-jin HongMi-jin Kim
    • H01L21/76
    • H01L21/823481H01L21/76229H01L21/823456H01L27/0921H01L27/105
    • Methods of manufacturing a semiconductor device, which can reduce hot electron induced punchthrough (HEIP) and/or improve the operating characteristics of the device include selectively forming an oxynitride layer in a device isolation layer according to the characteristics of transistors isolated by the device isolation layer. The methods include forming first trenches and second trenches on a substrate, forming an oxide layer on the surfaces of the first trenches and the second trenches, selectively forming an oxynitride layer on the second trenches by using plasma ion immersion implantation (PIII), and forming a buried insulating layer in the first trenches and the second trenches. The buried insulating layer may be planarized to form a first device isolation layer in the first trenches and a second device isolation layer in the second trenches.
    • 可以减少热电子穿透(HEIP)和/或改善器件的工作特性的半导体器件的制造方法包括根据器件隔离层隔离的晶体管的特性选择性地在器件隔离层中形成氧氮化物层 。 所述方法包括在衬底上形成第一沟槽和第二沟槽,在第一沟槽和第二沟槽的表面上形成氧化物层,通过使用等离子体离子浸没注入(PIII)在第二沟槽上选择性地形成氧氮化物层,并形成 在第一沟槽和第二沟槽中的掩埋绝缘层。 掩埋绝缘层可以被平坦化以在第一沟槽中形成第一器件隔离层,在第二沟槽中形成第二器件隔离层。
    • 46. 发明授权
    • Trench isolation regions having recess-inhibiting layers therein that protect against overetching
    • 沟槽隔离区域在其中具有防止过蚀刻的凹陷抑制层
    • US06717231B2
    • 2004-04-06
    • US10224017
    • 2002-08-20
    • Sung-eui KimKeum-joo LeeIn-seak HwangYoung-sun KohDong-ho AhnMoon-han ParkTai-su Park
    • Sung-eui KimKeum-joo LeeIn-seak HwangYoung-sun KohDong-ho AhnMoon-han ParkTai-su Park
    • H01L2176
    • H01L21/76224
    • Methods of forming trench isolation regions include the steps of forming a semiconductor substrate having a trench therein and a masking layer thereon extending adjacent the trench. The masking layer may comprise silicon nitride. A recess-inhibiting layer is then formed on a sidewall of the trench and on a sidewall of the masking layer. Next, a stress-relief layer is formed on the recess-inhibiting layer. This stress-relief layer extends opposite the sidewall of the trench and opposite the sidewall of the masking layer and may comprise silicon nitride. The trench is then filled with a trench isolation layer. A sequence of planarization or etch-back steps are then performed to remove the masking layer and also align an upper surface of the trench isolation layer with a surface of the substrate. At least a portion of the masking layer is removed using a first etchant (e.g., phosphoric acid) that selectively etches the masking layer and the stress-relief layer at faster rates than the first recess-inhibiting layer. The recess-inhibiting layer is formed directly on a sidewall of the masking layer in order to limit the extent to which the outer surfaces of the stress-relief layer are exposed to the first etchant. In this manner, recession of the stress-relief layer and the voids that may subsequently develop as a result of the recession can be reduced. Multiple thin stress-relief layers may also be provided and these multiple layers provide a degree of stress-relief that is comparable with a single much thicker stress-relief layer.
    • 形成沟槽隔离区域的方法包括以下步骤:在其中形成具有沟槽的半导体衬底和其上邻近沟槽延伸的掩模层。 掩模层可以包括氮化硅。 然后在沟槽的侧壁和掩模层的侧壁上形成凹陷抑制层。 接下来,在凹陷抑制层上形成应力消除层。 该应力消除层与沟槽的侧壁相对并且与掩模层的侧壁相对延伸并且可以包括氮化硅。 然后用沟槽隔离层填充沟槽。 然后执行一系列平面化或蚀刻步骤以去除掩模层,并且还使沟槽隔离层的上表面与衬底的表面对准。 使用第一蚀刻剂(例如磷酸)去除掩模层的至少一部分,其以比第一凹陷抑制层更快的速率选择性地蚀刻掩模层和应力消除层。 凹陷抑制层直接形成在掩模层的侧壁上,以限制应力消除层的外表面暴露于第一蚀刻剂的程度。 以这种方式,可以减少应力消除层的凹陷和随后可能由于凹陷而形成的空隙。 还可以提供多个薄的应力消除层,并且这些多层提供与单个更厚的应力消除层相当的应力消除程度。