CN103247574A - 鳍式场效应晶体管(finfet)器件的切割掩模图案化工艺 - Google Patents
鳍式场效应晶体管(finfet)器件的切割掩模图案化工艺 Download PDFInfo
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
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- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/308—Chemical or electrical treatment, e.g. electrolytic etching using masks
- H01L21/3083—Chemical or electrical treatment, e.g. electrolytic etching using masks characterised by their size, orientation, disposition, behaviour, shape, in horizontal or vertical plane
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- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
- H01L21/84—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being other than a semiconductor body, e.g. being an insulating body
- H01L21/845—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components the substrate being other than a semiconductor body, e.g. being an insulating body including field-effect transistors with a horizontal current flow in a vertical sidewall of a semiconductor body, e.g. FinFET, MuGFET
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- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1203—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body the substrate comprising an insulating body on a semiconductor body, e.g. SOI
- H01L27/1211—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body the substrate comprising an insulating body on a semiconductor body, e.g. SOI combined with field-effect transistors with a horizontal current flow in a vertical sidewall of a semiconductor body, e.g. FinFET, MuGFET
Abstract
本发明涉及鳍式场效应晶体管(FinFET)器件的切割掩模图案化工艺,其中,用于以非矩形图案对多个部件(诸如位于集成电路器件上)进行图案化的方法包括:提供包括具有多个伸长凸起的表面的衬底,伸长凸起在第一方向上延伸。在表面上方和多个伸长凸起上方形成第一层,并利用端部切割掩模对其进行图案化。端部切割掩模包括两个紧邻的图案,亚分辨率部件被定位和配置为使得第一层上的合成图案包括两个紧邻的图案以及位于它们之间的连接部分。该方法进一步包括使用第一层上的图案对伸长凸起进行端部切割。
Description
技术领域
本发明涉及半导体领域,更具体地,涉及鳍式场效应晶体管(FinFET)器件的切割掩模(cut-mask)图案化工艺。
背景技术
集成电路(IC)技术不断得到提高。这种提高通常涉及按比例缩小器件的几何尺寸,以实现更低的制造成本、更高的器件集成密度、更高的速度以及更好的性能。光刻法通常用于形成集成电路器件的元件,在一般情况下,曝光工具使光穿过掩模或中间掩模并且将光聚焦在晶圆的抗蚀剂层上,使得抗蚀剂层在其中具有集成电路元件的图像。曝光工具的分辨率限制了形成具有较小尺寸的器件图案。例如,形成鳍式场效应晶体管(FinFET)器件受限于目前的光刻分辨率限制。因此,尽管现有光刻技术通常足以实现其预期目的,但是随着器件的不断缩小,现有的光刻技术已经不能在所有方面都完全令人满意。
发明内容
本公开描述了集成电路器件、处理方法以及用于半导体处理的掩模。在一个实施例中,用于对集成电路器件上的多个部件进行图案化的方法包括提供衬底,该衬底包括具有多个伸长凸起的表面,伸长凸起在第一方向上延伸。第一层形成在表面的上方和多个伸长凸起的上方,并且利用端部切割掩模对其进行图案化。端部切割掩模包括两个紧邻的图案,其中,亚分辨部件被定位和配置成使得第一层上的合成图案包括两个紧邻的图案和它们之间的连接部分。该方法进一步包括使用第一层上的图案切割伸长凸起的端部。
优选地,第一层是硬掩模层。
优选地,第一层是光刻胶层。
优选地,多个部件是鳍式场效应晶体管(FinFET)器件的鳍。
优选地,伸长凸起是氮化硅隔离件。
优选地,多个部件是沟槽。
优选地,该方法进一步包括:在形成第一层之前,在表面的上方和多个伸长凸起的上方形成第二层;利用线切割掩模对第二层进行图案化;使用第二层上的图案去除伸长凸起的子集。
在另一个实施例中,一种方法包括:提供包括具有第一层和第二层的表面的衬底;以及在第一和第二层上方的第三层中形成第一伸长凸起、第二伸长凸起和第三伸长凸起。第一图案化层形成在三个伸长凸起的上方,并且蚀刻多个伸长凸起以形成三个伸长凸起的第一图案。蚀刻第一图案去除了第二伸长凸起相对较大的部分以及第一伸长凸起和第三伸长凸起相对较小的部分,从而通过较大部分和较小部分形成一个区域。该方法进一步包括在伸长凸起的第一图案的上方形成第二图案化层。第二图案包括位于该区域上方的至少两个隔开的矩形子图案。然后,蚀刻延伸到该区域中的第一伸长凸起和第三伸长凸起的端部。
优选地,第二图案化层是光刻胶层。
优选地,第二图案化层包括非晶硅硬掩模。
优选地,多个伸长凸起在第一方向上延伸,并且第二图案化层被配置成为在垂直于第一方向的方向上对伸长凸起进行端部切割。
优选地,第二图案包括位于区域上方的三个分离的矩形子图案。
优选地,第一层包括硅,第二层包括二氧化硅,伸长凸起包括氮化硅。
优选地,第二图案中的氮化硅伸长凸起是用于鳍式场效应晶体管类型的鳍。
优选地,所述第二图案化层和所述第三图案化层蚀刻多个伸长凸起在包括二氧化硅的层中形成沟槽的图案。
本公开还描述了一种独特的掩模组,其用于具有限定分辨率的光刻系统,该掩模组包括第一掩模和第二掩模。在一个实施例中,掩模组包括第一掩模。第一掩模包括第一图案区域和第二图案区域,这些区域大于使用掩模组的光刻系统的限定分辨率。在相交区域中,第一图案区域和第二图案区域的多个部分被定位为相互接近。第一掩模还包括位于第一图案区域和第二图案区域之间以及相交区域中的亚分辨率部件。亚分辨率部件和相交区域的尺寸的组合使得当在光刻系统中使用掩模时,所得到的图案包括通过相交区域相互互连的第一图案区域和第二图案区域。
优选地,图案区域为矩形。
优选地,限定通过相交区域相互互连的第一图案区域和第二图案区域的大小以对鳍的结构进行图案化。
优选地,第二掩模包括:第三图案区域,形状与第一图案区域和第二图案区域以及相交区域的组合形状类似。
优选地,第二掩模用于对多个鳍进行线切割,并且第一掩模用于对多个鳍进行端部切割。
附图说明
当结合附图进行阅读时,根据下面详细的描述可以更好地理解本发明。应该强调的是,根据工业中的标准实践,各种部件没有被按比例绘制并且仅仅用于说明的目的。实际上,为了清楚的讨论,各种部件的尺寸可以被任意增大或减小。
图1A至图1D是其上形成多个隔离件的集成电路器件的示图。图1A至图1C是俯视图,图1D是图1C的集成电路器件的侧视图。
图2、图5、图8、图9和图14是根据本发明一个或多个实施例的用于进一步处理图1的器件的掩模的俯视图。
图3A至图4是根据本发明一个或多个实施例的使用图2的掩模进行处理的图1的集成电路器件的俯视图和截面图。
图6和图7是根据本发明一个或多个实施例的使用图5的掩模进行处理的图1的集成电路器件的俯视图。
图10至图13是根据本发明一个或多个实施例的使用图8和图9的掩模进行处理的图1的集成电路器件的俯视图。
图15是根据本发明一个或多个实施例的集成电路器件的俯视图。
具体实施方式
以下公开提供了多种不同实施例或实例,用于实现本发明的不同特征。以下将描述组件和布置的特定实例以简化本发明。当然,这些仅是实例并且不用于限制本发明。例如,在以下描述中,在第二部件上方或之上形成第一部件可以包括第一部件和第二部件直接接触的实施例,也可以包括其他部件可形成在第一部件和第二部件之间使得第一部件和第二部件不直接接触的实施例。另外,本发明可以在多个实例中重复参考符号和/或字符。这种重复用于简化和清楚,并且其本身不表示所述多个实施例和/或配置之间的关系。而且,本公开重复多种工艺(诸如,图案化)。将更为详细且借助首先进行论述的一系列可选实施例来描述该工艺。然后,为了避免不必要的重复,将在更多一般细节上对该工艺进行描述。然而,可以理解,这种细节和可选的实施例可以被应用在随后论述的工艺中。
本公开涉及各个制造阶段期间的集成电路器件。集成电路器件为集成电路(IC)芯片、芯片上系统(SoC)或者它们的一部分,集成电路器件包括各种无源和有源微电子部件,诸如电阻器、电容器、电感器、二极管、金属氧化物半导体场效应晶体管(MOSFET)、互补MOS(CMOS)晶体管、双极结型晶体管(BJT)、横向扩散MOS(LDMOS)晶体管、大功率MOS晶体管、鳍式场效应晶体管(FinFET)、其他适当部件或者它们的组合。在一些所示实施例中,如以下进一步描述的,集成电路器件包括各种FinFET器件,并且示出了FinFET器件制造的各个阶段过程中的集成电路器件。术语FinFET器件指的是任何鳍式、多栅极晶体管。可以在集成电路器件中添加额外部件,并且在集成电路器件的其他实施例中,可以替换或去除以下描述的一些部件。
参考图1A至图1D,执行第一或主要掩模工艺,以限定集成电路器件100的各个鳍结构的鳍的宽度和间距,其中,在各个FinFET器件中包括鳍结构。在图1A中,提供衬底110。在本实例中,衬底110为包括硅(Si)和二氧化硅(SiO2)的叠层的半导体衬底。可选或另外地,衬底110包括:基本半导体,诸如硅或锗;化合物半导体,诸如碳化硅、砷化镓、磷化镓、磷化铟、砷化铟、和/或锑化铟;或者它们的组合。可选地,衬底110为绝缘体上硅(SOI)衬底,其可以使用注氧隔离(SIMOX)、晶圆接合或其他方法来制造。衬底110可以包括各种掺杂区域和其他适当部件。
芯轴(mandrel)120的阵列设置在衬底110上方,其中,相邻的芯轴120相互隔开。芯轴120包括图案化或掩蔽材料,诸如抗蚀剂材料、多晶硅、氧化硅、氮化硅、其他图案化或掩蔽材料或者它们的组合。在实例中,形成芯轴120包括:在衬底110上方沉积图案化或掩蔽层(诸如多晶硅层);在掩蔽层上方形成抗蚀剂层;使用芯轴掩模(可以称作主掩模)将抗蚀剂层暴露在辐射中,从而形成抗蚀剂层的曝光部分和抗蚀剂层的未曝光部分;去除抗蚀剂层的曝光部分和未曝光部分(例如,通过使曝光的抗蚀剂层处于显影溶液的环境中),从而形成暴露部分掩蔽层的图案化抗蚀剂层;以及使用图案化的抗蚀剂层来蚀刻掩蔽层(具体地,掩蔽层的曝光部分),以形成如图1A所示的芯轴120。在其他实例中,通过各种沉积工艺、光刻工艺、蚀刻工艺或它们的组合来形成芯轴120。沉积工艺包括:化学汽相沉积(CVD)、物理汽相沉积(PVD)、原子层沉积(ALD)、高密度等离子体CVD(HDPCVD)、金属有机CVD、远程等离子体CVD(RPCVD)、等离子体增强CVD(PECVD)、低压CVD(LPCVD)、原子层CVD(ALCVD)、常压CVD(APCVD)、电镀、其他沉积方法或它们的组合。光刻工艺可以包括抗蚀剂涂覆(例如,旋涂)、软烘、掩模对准、曝光、曝光后烘焙、显影抗蚀剂、冲洗、干燥(例如,硬烘)、其他光刻工艺或它们的组合。可选地,可以通过其他方法实施或替换光刻工艺,例如,无掩模光刻、电子束写入、离子束写入和/或纳米压印技术。蚀刻工艺包括干蚀刻、湿蚀刻、其他蚀刻方法或它们的组合。
在图1B中,在衬底110的上方形成隔离件130,使得每一个芯轴120都被隔离件130围绕;以及在图1C中,例如通过蚀刻工艺去除芯轴120,使得隔离件130保持设置在衬底110上方。隔离件130包括图案化或掩蔽材料,在本实施例中为氮化硅(SiN)。其他实例包括抗蚀剂材料、多晶硅、氧化硅、其他图案化或掩蔽材料或者它们的组合。通过各种沉积工艺、光刻工艺、蚀刻工艺或它们的组合(例如,本文所述的工艺)来形成隔离件130。每个芯轴120的相对侧壁上的隔离件130的宽度小于每个芯轴120的宽度。每个芯轴120的相对侧壁上的隔离件还通过小于芯轴120的间距的间距相互隔开。如下文中进一步描述的,隔离件130用于形成集成电路器件100的鳍结构,并且下文中将其称作鳍130。
期望将图1C和图1D所示的鳍130的组图案化为预定的非矩形图案。如下面进一步所论述的,通常在对鳍130进行成型时产生困难,尤其是对鳍进行端部切割以使鳍的端部均匀对准,并且不包括边角的倒角(特别是在非矩形图案的内角的周围)。
现参考图2,将在本实施例中使用掩模210以去除一些或所有鳍130(线切割),从而形成非矩形图案。可以理解,如本领域所公知的,可以根据对光刻和掩模制造的普遍理解来修改掩模。例如,本实例将实施正性光刻胶,其中,掩模上的亮色调用于曝光光刻胶上的相应图案。当然,也可以使用负性光刻胶,从而使掩模上的暗色调用于曝光光刻胶上的相应部分。此外,如本领域已知的,还可以使用诸如光学邻近校正的公知技术。另外,下面所论述的光刻工艺可以是多种类型并且可以包括多个步骤,诸如上面参考图1A至图1C所论述的。
可以以各种技术形成掩模210。例如,可以使用二元技术(binarytechnology)形成掩模。二元掩模包括透明衬底(例如,熔融石英)和涂覆在掩模的不透明区域中的不透明材料(例如,铬)。在另一实例中,使用相移技术来形成掩模,其中,形成在掩模上的图案中的各种部件被配置成具有适当相差,以提高分辨率和成像质量。在各个实例中,相移掩模(PSM)可以为衰减PSM或交替PSM。
掩模210被用于线切割,并提供本实施例所期望的非矩形图案212。非矩形的图案212被示为暗色调,而周围的区域被示为亮色调。非矩形的图案212将用于形成器件100上的鳍130的相应图案。
参考图3A、图3B和图4,在本实施例中,在SiN鳍130的上方和衬底110的上方,向器件100涂敷光刻胶层,其中,衬底包括Si层142和SiO2层144。在光刻工艺中使用掩模210以在器件上形成非矩形光刻胶图案304。非矩形图案与掩模210的图案212(图2)相对应。然后,执行SiN选择性蚀刻工艺(不选择SiO2)来去除部分SiN鳍130,从而制造如图4所示的非矩形鳍图案。一些蚀刻剂实例为CF4或SF6。然后,去除非矩形光刻胶图案304。如图4所示,鳍130的端部410是不规则的,其中,鳍的端部既不具有恰当长度也不均匀。如图4所示,还应该注意,图案304的内角是弯曲的。这至少部分地归因于光刻分辨率(lithography resolution)的限制,尤其在图案边角周围。
现参考图5,在本实施例中使用掩模520以将鳍130的端部切割成非矩形图案。可以在已经使用掩模210(图2)进行线切割之后使用掩模520,或者可以单独使用掩模520来执行线切割和端部切割。可以理解,如本领域所公知的(诸如上面参考图2所论述的),可以根据对光刻和掩模制造的普遍理解来修改掩模。此外,如上面参考图2所论述的,还可以在各种技术中形成掩模210。掩模210用于进行端部切割,并提供本实施例所期望的非矩形图案。
如图所示,掩模520包括在相交区域中相互非常接近的两个矩形图案522和524。在两个图案522和524之间的相交区域中具有亚分辨率部件(sub-resolution feature)526。亚分辨率部件526具有诸如大小或形状的特性通常认为在相应光刻工艺的分辨率局限范围以外。在本实施例中,亚分辨率部件526是通常用于光学邻近校正(OPC)的部件,其与本领域公知的散射条类似。通过在相交区域中设置为与两个图案522、524相邻,亚分辨率部件526引入相反邻近效应(counter proximity effect),有时称为隔离/密集邻近效应。如下面更为详细所论述的,亚分辨率部件526的使用对形成在器件上的最终图案产生了独特的效果。
参考图6和图7,在本实施例中,在SiN鳍130的上方和衬底110的上方,将光刻胶层涂敷至器件100,其中,衬底包括Si层142和SiO2层144。在光刻工艺中使用掩模520以在器件上形成非矩形光刻胶图案604。非矩形图案相应于掩模520的图案(图5)。利用掩模520上存在的亚分辨率部件526来连接图案522和524。在曝光之后,亚分辨率部件526不会在衬底上产生图案化线,因为其是辅助图案。在没有亚分辨率部件526的情况下,将出现如上面所论述的端部410(图4)中的边角倒角。利用亚分辨率部件526,边角倒角被减小。然后,执行SiN选择性蚀刻工艺(不选择SiO2)以去除非矩形图案外的部分SiN鳍130,从而产生图7所示的非矩形鳍图案。然后,去除非矩形光刻胶图案604。如图7所示,鳍130的端部710不像图4所示那样不规则,而是相对较为均匀。如图7所示,还应该注意,图案的内角不像图4那样弯曲。这至少部分归因于亚分辨率部件526。
现参考图8和图9,在另一个实施例中,将使用掩模820来去除图1D的一些或所有的鳍130(线切割),并且掩模920被用于进一步切割剩余鳍的端部,从而形成非矩形图案。可以理解,如本领域所公知的(诸如上面参考图2所论述的),可以根据对光刻和掩模制造的普遍理解来修改掩模820、920。此外,如上面参考图2所论述的,还可以在各种技术中形成掩模820、920。掩模820、920提供了本实施例所期望的非矩形图案。掩模820包括非矩形图案822,而掩模920包括两个非矩形图案922和924。
参考图10和图11,在本实施例中,在SiN鳍130的上方和衬底110的上方,将光刻胶层涂敷至器件100。在光刻工艺中使用掩模820以在器件100上形成非矩形光刻胶图案1012。非矩形图案相应于掩模820的图案(图8)。然后,执行SiN选择性蚀刻工艺(不选择SiO2)来去除非矩形图案外的部分SiN鳍130,从而产生图11所示的非矩形鳍图案。然后,去除非矩形光刻胶图案604。如图11所示,一些鳍130被去除。剩余的一些鳍具有在边角周围弯曲的端部1120。
参考图12和图13,接下来,在剩余SiN鳍130的上方,将第二光刻胶层涂敷至器件100。在光刻工艺中使用掩模920以在器件100上形成非矩形光刻胶图案1210。非矩形图案相应于掩模920的图案(图9)。然后,执行SiN选择性蚀刻工艺(不选择SiO2)来切割非矩形图案外的SiN鳍130,从而产生图13所示的非矩形鳍图案。然后,去除非矩形光刻胶图案604。如图13所示,鳍130的端部1320不像图11那样不规则,而是相对较为均匀。如图13所示,还应该注意,图案的内角不像图11那样弯曲。
针对上面所讨论的,存在多种额外的可选实施例。参考图14,可以使用掩模1420代替掩模920(图9)来切割剩余鳍130的端部,从而形成非矩形图案。掩模1420包括分别与图案922,924的右侧(如图9所示)相对应的图案1422和1424。然而,提供单个线切割图案1426以与图案922、924的左侧(如图9所示)。可以理解,如本领域所公知的(诸如上面参考图2所论述的),可以根据对光刻和掩模制造的普遍理解来修改掩模。
在另外的实施例中,可以使用电子束图案化器件来代替掩模920(图9)切割剩余鳍130的端部,从而形成非矩形图案。电子束图案化可以改善不规则和倒角的线端部,尽管减小量很小。
在其他实施例中,可使用硬掩模工艺来形成上述图案。例如,可以将第一非晶硅层形成在包括鳍的器件的上方,然后在其上沉积光刻胶层。如上面所论述地对光刻胶层进行图案化,随后对下面的非晶硅层进行图案化以形成硬掩模。使用图案化的硬掩模,如上所述继续下面层的图案化。
在其他实施例中,可以使用上述的掩模和方法来制造鳍以外的其他部件,诸如,沟槽图案。
现参考图15,示出了具有电路区域1502的器件100,电路区域包括多个非矩形区域1504和1506。在器件100的实施例中,非矩形区域1504可以包括n型FinFET,而非矩形区域1506可以包括p型FinFET。可以理解,尽管非矩形区域1504、1506被示为U形,但是还可以使用其他非矩形形状,包括L形、E形等。
上面论述了若干实施例的部件,使得本领域普通技术人员可以更好地理解本发明的各个方面。本领域普通技术人员应该理解,可以很容易地使用本发明作为基础来设计或更改其他用于达到与这里所介绍实施例相同的目的和/或实现相同优点的处理和结构。本领域普通技术人员也应该意识到,这种等效构造并不背离本发明的精神和范围,并且在不背离本发明的精神和范围的情况下,可以进行多种变化、替换以及改变。
Claims (10)
1.一种用于以非矩形图案对多个部件进行图案化的方法,所述方法包括:
提供包括具有多个伸长凸起的表面的衬底,伸长凸起在第一方向上延伸;
在所述表面的上方和所述多个伸长凸起的上方形成第一层;
利用端部切割掩模对所述第一层进行图案化,所述端部切割掩模包括两个紧邻的图案,亚分辨率部件被定位并配置为使得所述第一层上的合成图案包括所述两个紧邻的图案和位于它们之间的连接部分;
使用所述第一层上的图案切割所述伸长凸起的端部。
2.根据权利要求1所述的方法,其中,所述多个部件是鳍式场效应晶体管(FinFET)器件的鳍。
3.根据权利要求1所述的方法,其中,所述多个部件是沟槽。
4.根据权利要求1所述的方法,进一步包括:
在形成所述第一层之前,在所述表面的上方和所述多个伸长凸起的上方形成第二层;
利用线切割掩模对所述第二层进行图案化;
使用所述第二层上的图案去除所述伸长凸起的子集。
5.一种方法,包括:
提供包括具有第一层和第二层的表面的衬底;
在所述第一层和所述第二层上方的第三层中形成第一伸长凸起、第二伸长凸起和第三伸长凸起;
在三个伸长凸起的上方形成第一图案化层;
蚀刻这三个伸长凸起以形成第一图案,所述第一图案去除所述第二伸长凸起相对较大的部分以及所述第一伸长凸起和所述第三伸长凸起相对较小的部分,从而通过较大部分和较小部分形成一个区域;
在伸长凸起的所述第一图案的上方形成第二图案化层,第二图案包括位于所述区域上方的至少两个分离的矩形子图案;以及
蚀刻在所述区域中延伸的所述第一伸长凸起和所述第三伸长凸起的端部。
6.根据权利要求5所述的方法,其中,所述多个伸长凸起在第一方向上延伸,并且所述第二图案化层被配置成为在垂直于所述第一方向的方向上对所述伸长凸起进行端部切割。
7.根据权利要求6所述的方法,其中,所述第二图案包括位于所述区域上方的三个分离的矩形子图案。
8.一种用于具有限定分辨率的光刻系统的掩模组,所述掩模组包括第一掩模和第二掩模,所述第一掩模包括:
第一图案区域和第二图案区域,大于所述限定分辨率,其中,所述第一图案区域的部分和所述第二图案区域的部分被定位为相互接近并通过相交区域分隔;
亚分辨率部件,位于所述第一图案区域和所述第二图案区域之间以及所述相交区域之中;
其中,所述亚分辨率部件的大小和形状以及所述相交区域的大小使得当在所述光刻系统中使用掩模时,所得到的图案包括通过所述相交区域相互互连的所述第一图案区域和所述第二图案区域。
9.根据权利要求8所述的掩模组,其中,所述第二掩模包括:
第三图案区域,形状与所述第一图案区域和所述第二图案区域以及所述相交区域的组合形状类似。
10.根据权利要求9所述的掩模组,其中,所述第二掩模用于对多个鳍进行线切割,并且所述第一掩模用于对所述多个鳍进行端部切割。
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US9236267B2 (en) | 2016-01-12 |
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US9904163B2 (en) | 2018-02-27 |
US20160124300A1 (en) | 2016-05-05 |
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