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    • 4. 发明授权
    • Semiconductor device structure including a tantalum pentoxide layer sandwiched between silicon nitride layers
    • 包括夹在氮化硅层之间的五氧化二钽层的半导体器件结构
    • US06482694B2
    • 2002-11-19
    • US09878657
    • 2001-06-11
    • Sailesh ChittipeddiCharles Walter Pearce
    • Sailesh ChittipeddiCharles Walter Pearce
    • H01L218242
    • H01L28/40H01L21/3144H01L21/31604H01L21/3185H01L27/0805H01L27/1085
    • An insulating structure includes a first silicon nitride layer, a tantalum pentoxide layer formed above the first silicon nitride (SiNx) layer, and a second silicon nitride layer formed above the tantalum pentoxide (Ta2O5) layer. The SiNx cladding layers prevent diffusion of the tantalum during heating. A high dielectric constant is provided. The thermal stability of the insulating structure is improved. The insulating structure may be included in a capacitor or a shallow trench isolation structure. An exemplary capacitor is formed with a substrate, a lower electrode, the three-layer SixNy/Ta2O5/SixNy structure and an upper electrode. The lower electrode may include a TiN layer formed over an aluminum layer, or a TiN layer formed over a polysilicon layer, or a polysilicon layer having an oxide barrier layer formed on it. The upper electrode may be a TiN layer or a polysilicon layer. An exemplary shallow trench isolation structure includes the SixNy/Ta2O5/SixNy structure as a liner on the sides and bottom of a shallow trench in the surface of a substrate. The shallow trench is filled with an oxide, such as TEOS. A variety of methods may be used for fabricating devices that include the SixNy/Ta2O5/SixNy structure.
    • 绝缘结构包括第一氮化硅层,形成在第一氮化硅(SiNx)层上方的五氧化二钽层和形成在五氧化二钽(Ta2O5)上方的第二氮化硅层。 SiNx覆层在加热期间防止钽的扩散。 提供高介电常数。 绝缘结构的热稳定性提高。 绝缘结构可以包括在电容器或浅沟槽隔离结构中。 示例性电容器由基板,下电极,三层SixNy / Ta2O5 / SixNy结构和上电极形成。 下电极可以包括在铝层上形成的TiN层,或者形成在多晶硅层上的TiN层,或者在其上形成有氧化物阻挡层的多晶硅层。 上电极可以是TiN层或多晶硅层。 示例性的浅沟槽隔离结构包括作为衬底在衬底表面的浅沟槽的侧面和底部上的SixNy / Ta2O5 / SixNy结构。 浅沟槽中填充有氧化物,如TEOS。 可以使用各种方法来制造包括SixNy / Ta2O5 / SixNy结构的器件。
    • 5. 发明授权
    • Semiconductor device structure including a tantalum pentoxide layer sandwiched between silicon nitride layers
    • 包括夹在氮化硅层之间的五氧化二钽层的半导体器件结构
    • US06294807B1
    • 2001-09-25
    • US09259001
    • 1999-02-26
    • Sailesh ChittipeddiCharles Walter Pearce
    • Sailesh ChittipeddiCharles Walter Pearce
    • H01L27108
    • H01L28/40H01L21/3144H01L21/31604H01L21/3185H01L27/0805H01L27/1085
    • An insulating structure includes a first silicon nitride layer, a tantalum pentoxide layer formed above the first silicon nitride (SiNx) layer, and a second silicon nitride layer formed above the tantalum pentoxide (Ta2O5) layer. The SiNx cladding layers prevent difflusion of the tantalum during heating. A high dielectric constant is provided. The thermal stability of the insulating structure is improved. The insulating structure may be included in a capacitor or a shallow trench isolation structure. An exemplary capacitor is formed with a substrate, a lower electrode, the three-layer SixNy/Ta2O5/SixNy structure and an upper electrode. The lower electrode may include a TiN layer formed over an aluminum layer, or a TiN layer formed over a polysilicon layer, or a polysilicon layer having an oxide barrier layer formed on it. The upper electrode may be a TiN layer or a polysilicon layer. An exemplary shallow trench isolation structure includes the SixNy/Ta2O5/SixNy structure as a liner on the sides and bottom of a shallow trench in the surface of a substrate. The shallow trench is filled with an oxide, such as TEOS. A variety of methods may be used for fabricating devices that include the SixNy/Ta2O5/SixNy structure.
    • 绝缘结构包括第一氮化硅层,形成在第一氮化硅(SiNx)层上方的五氧化二钽层和形成在五氧化二钽(Ta2O5)上方的第二氮化硅层。 SiNx覆层在加热期间防止了钽的杂散。 提供高介电常数。 绝缘结构的热稳定性提高。 绝缘结构可以包括在电容器或浅沟槽隔离结构中。 示例性电容器由基板,下电极,三层SixNy / Ta2O5 / SixNy结构和上电极形成。 下电极可以包括在铝层上形成的TiN层,或者形成在多晶硅层上的TiN层,或者在其上形成有氧化物阻挡层的多晶硅层。 上电极可以是TiN层或多晶硅层。 示例性的浅沟槽隔离结构包括作为衬底在衬底表面的浅沟槽的侧面和底部上的SixNy / Ta2O5 / SixNy结构。 浅沟槽中填充有氧化物,如TEOS。 可以使用各种方法来制造包括SixNy / Ta2O5 / SixNy结构的器件。