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    • 2. 发明授权
    • Nitrogen profile in high-K dielectrics using ultrathin disposable capping layers
    • 使用超薄一次性封盖层的高K电介质中的氮分布
    • US08008216B2
    • 2011-08-30
    • US11860066
    • 2007-09-24
    • Husam AlshareefManuel Quevedo Lopez
    • Husam AlshareefManuel Quevedo Lopez
    • H01L21/31H01L21/469
    • H01L21/28238H01L21/28202H01L21/823857H01L29/518H01L29/6659H01L29/7833
    • Metal Oxide Semiconductor (MOS) transistors fabricated using current art may utilize a nitridation process on the gate dielectric to improve transistor reliability. Nitridation by the current art, which involves exposing the gate dielectric to a nitridation source, produces a significant concentration of nitrogen at the interface of the gate dielectric and the transistor substrate, which adversely affects transistor performance. This invention comprises the process of depositing a sacrificial layer on the gate dielectric prior to nitridation, exposing the sacrificial layer to a nitridation source, during which time nitrogen atoms diffuse through the sacrificial layer into the gate dielectric, then removing the sacrificial layer without degrading the gate dielectric. Work associated with this invention on high-k gate dielectrics has demonstrated a 20 percent reduction in nitrogen concentration at the gate dielectric—transistor substrate interface.
    • 使用现有技术制造的金属氧化物半导体(MOS)晶体管可以利用栅极电介质上的氮化工艺来提高晶体管的可靠性。 目前的技术的氮化,其涉及将栅极电介质暴露于氮化源,在栅极电介质和晶体管衬底的界面处产生显着的氮浓度,这对晶体管性能产生不利影响。 本发明包括在氮化之前在栅极电介质上沉积牺牲层的过程,将牺牲层暴露于氮化源,在此期间氮原子通过牺牲层扩散到栅极电介质中,然后去除牺牲层而不降低 栅电介质。 与本发明相关的高k栅极电介质的工作已经证明了在栅极介电晶体管衬底界面处的氮浓度降低了20%。
    • 4. 发明申请
    • Nitrogen Profile in High-K Dielectrics Using Ultrathin Disposable Capping Layers
    • 使用超薄一次性封盖层的高K电介质中的氮分布
    • US20090104743A1
    • 2009-04-23
    • US11860066
    • 2007-09-24
    • Husam AlshareefManuel Quevedo Lopez
    • Husam AlshareefManuel Quevedo Lopez
    • H01L21/8238H01L21/3115
    • H01L21/28238H01L21/28202H01L21/823857H01L29/518H01L29/6659H01L29/7833
    • Metal Oxide Semiconductor (MOS) transistors fabricated using current art may utilize a nitridation process on the gate dielectric to improve transistor reliability. Nitridation by the current art, which involves exposing the gate dielectric to a nitridation source, produces a significant concentration of nitrogen at the interface of the gate dielectric and the transistor substrate, which adversely affects transistor performance. This invention comprises the process of depositing a sacrificial layer on the gate dielectric prior to nitridation, exposing the sacrificial layer to a nitridation source, during which time nitrogen atoms diffuse through the sacrificial layer into the gate dielectric, then removing the sacrificial layer without degrading the gate dielectric. Work associated with this invention on high-k gate dielectrics has demonstrated a 20 percent reduction in nitrogen concentration at the gate dielectric-transistor substrate interface.
    • 使用现有技术制造的金属氧化物半导体(MOS)晶体管可以利用栅极电介质上的氮化工艺来提高晶体管的可靠性。 目前的技术的氮化,其涉及将栅极电介质暴露于氮化源,在栅极电介质和晶体管衬底的界面处产生显着的氮浓度,这对晶体管性能产生不利影响。 本发明包括在氮化之前在栅极电介质上沉积牺牲层的过程,将牺牲层暴露于氮化源,在此期间氮原子通过牺牲层扩散到栅极电介质中,然后去除牺牲层而不降低 栅电介质。 与本发明相关的高k栅极电介质的工作已经证明了在栅极介电晶体管衬底界面处的氮浓度降低了20%。
    • 8. 发明申请
    • Methods and systems to mitigate etch stop clipping for shallow trench isolation fabrication
    • 用于减轻浅沟槽隔离制造的蚀刻停止限幅的方法和系统
    • US20050282351A1
    • 2005-12-22
    • US10874038
    • 2004-06-22
    • Manuel Quevedo-LopezJames ChambersLeif Olsen
    • Manuel Quevedo-LopezJames ChambersLeif Olsen
    • H01L21/76H01L21/762H01L21/8238
    • H01L29/7842H01L21/76224H01L21/823807H01L21/823878
    • The present invention facilitates semiconductor fabrication by maintaining shape and density of an etch stop layer (206) during trench fill operations. The shape and density of the etch stop layer (206) is maintained by forming a protective alloy liner layer (310) on the etch stop layer (206) prior to trench fill operations. The protective alloy liner (310) is comprised of an alloy that is resistant to materials employed in the trench fill operations. As a result, clipping and/or damage to the etch stop layer (206) is mitigated thereby facilitating a subsequent planarization process that employs the etch stop layer (206). Additionally, selection of thickness and composition (1706) of the formed protective alloy (310) yields a stress amount and type (1704) that is applied to channel regions of unformed transistor devices, ultimately providing for an improvement in channel mobility.
    • 本发明通过在沟槽填充操作期间保持蚀刻停止层(206)的形状和密度来促进半导体制造。 通过在沟槽填充操作之前在蚀刻停止层(206)上形成保护合金衬垫层(310)来保持蚀刻停止层(206)的形状和密度。 保护合金衬套(310)由对沟槽填充操作中使用的材料具有耐受性的合金构成。 结果,减轻了对蚀刻停止层(206)的削波和/或损伤,从而有利于采用蚀刻停止层(206)的随后的平坦化工艺。 此外,形成的保护合金(310)的厚度和组成(1706)的选择产生施加到未成形晶体管器件的沟道区域的应力量和类型(1704),最终提供了沟道迁移率的改善。