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    • 81. 发明申请
    • SELF ALIGNED METAL GATES ON HIGH-K DIELECTRICS
    • 高K电子自对准金属门
    • US20070045676A1
    • 2007-03-01
    • US11451703
    • 2006-06-13
    • Leonard ForbesKie Ahn
    • Leonard ForbesKie Ahn
    • H01L29/76H01L29/94H01L31/00
    • H01L29/517H01L21/28114H01L21/28273H01L29/42376H01L29/495H01L29/6653H01L29/66545Y10S438/926
    • A method for forming a transistor including a self aligned metal gate is provided. According to various method embodiments, a high-k gate dielectric is formed on a substrate and a sacrificial carbon gate is formed on the gate dielectric. Sacrificial carbon sidewall spacers are formed adjacent to the sacrificial carbon gate, and source/drain regions for the transistor are formed using the sacrificial carbon sidewall spacers to define the source/drain regions. The sacrificial carbon sidewall spacers are replaced with non-carbon sidewall spacers, and the sacrificial carbon gate is replaced with a desired metal gate material to provide the desired metal gate material on the gate dielectric. Various embodiments form source/drain extensions after removing the carbon sidewall spacers and before replacing with non-carbon sidewall spacers. An etch barrier is used in various embodiments to separate the sacrificial carbon gate from the sacrificial carbon sidewall spacers. Other aspects and embodiments are provided herein.
    • 提供一种形成包括自对准金属栅极的晶体管的方法。 根据各种方法实施例,在衬底上形成高k栅极电介质,并且在栅极电介质上形成牺牲碳栅。 牺牲碳侧壁间隔件邻近牺牲碳栅形成,并且使用牺牲碳侧壁间隔物形成用于晶体管的源/漏区,以限定源极/漏极区。 牺牲碳侧壁间隔物被非碳侧壁间隔物代替,并且牺牲碳栅被替换为期望的金属栅极材料以在栅极电介质上提供所需的金属栅极材料。 各种实施例在去除碳侧壁间隔物之后并且在用非碳侧壁间隔物替换之前形成源极/漏极扩展。 在各种实施例中使用蚀刻阻挡层将牺牲碳栅极与牺牲碳侧壁间隔物分离。 本文提供了其它方面和实施例。
    • 82. 发明申请
    • Atomic layer deposition of CeO2/Al2O3 films as gate dielectrics
    • CeO2 / Al2O3薄膜的原子层沉积作为栅极电介质
    • US20070020835A1
    • 2007-01-25
    • US11528776
    • 2006-09-28
    • Kie AhnLeonard Forbes
    • Kie AhnLeonard Forbes
    • H01L21/8234
    • H01L21/28194C23C16/40C23C16/45529H01L21/02178H01L21/02192H01L21/022H01L21/0228H01L21/3142H01L21/31604H01L21/3162H01L29/513H01L29/517H01L29/78H01L2924/0002H01L2924/00
    • The use of atomic layer deposition (ALD) to form a nanolaminate layered dielectric layer of cerium oxide and aluminum oxide acting as a single dielectric layer with a ratio of approximately two to one between the cerium oxide and the aluminum oxide, and a method of fabricating such a dielectric layer is described. The described arrangement produces a reliable structure with a high dielectric constant (high-k) for use in a variety of electronic devices. The dielectric structure is formed by depositing cerium oxide by atomic layer deposition onto a substrate surface using precursor chemicals, followed by depositing aluminum oxide onto the substrate using precursor chemicals, and repeating to form the thin laminate structure. Such a dielectric layer of cerium oxide and aluminum oxide may be used as the gate insulator of a MOSFET, as a capacitor dielectric in a DRAM, as a tunnel gate insulator in flash memory, or as a dielectric in an NROM device, because the high dielectric constant (high-k) of the film provides the functionality of a much thinner silicon dioxide film.
    • 使用原子层沉积(ALD)在氧化铈和氧化铝之间形成作为单一电介质层的二氧化铈和氧化铝的纳米级层状电介质层,其比例约为2比1,以及制造方法 描述这种介电层。 所描述的布置产生用于各种电子设备的具有高介电常数(高k)的可靠结构。 通过使用前体化学品,通过原子层沉积将氧化铈沉积到衬底表面上,然后使用前体化学品将氧化铝沉积到衬底上并重复形成薄层压结构来形成电介质结构。 这样的氧化铈和氧化铝的电介质层可以用作MOSFET的栅极绝缘体,作为DRAM中的电容器电介质,作为闪速存储器中的隧道栅极绝缘体,或者作为NROM器件中的电介质,因为高的 膜的介电常数(high-k)提供了更薄的二氧化硅膜的功能。