CN116963870A - 用于原位重新生成表面纹理的使用增材制造处理形成的结构 - Google Patents
用于原位重新生成表面纹理的使用增材制造处理形成的结构 Download PDFInfo
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- 230000008023 solidification Effects 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- MUTNCGKQJGXKEM-UHFFFAOYSA-N tamibarotene Chemical compound C=1C=C2C(C)(C)CCC(C)(C)C2=CC=1NC(=O)C1=CC=C(C(O)=O)C=C1 MUTNCGKQJGXKEM-UHFFFAOYSA-N 0.000 description 1
- YRHRIQCWCFGUEQ-UHFFFAOYSA-N thioxanthen-9-one Chemical class C1=CC=C2C(=O)C3=CC=CC=C3SC2=C1 YRHRIQCWCFGUEQ-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- RRHXZLALVWBDKH-UHFFFAOYSA-M trimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]azanium;chloride Chemical compound [Cl-].CC(=C)C(=O)OCC[N+](C)(C)C RRHXZLALVWBDKH-UHFFFAOYSA-M 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- FKMJROWWQOJRJX-UHFFFAOYSA-M triphenyl(prop-2-enyl)phosphanium;chloride Chemical compound [Cl-].C=1C=CC=CC=1[P+](C=1C=CC=CC=1)(CC=C)C1=CC=CC=C1 FKMJROWWQOJRJX-UHFFFAOYSA-M 0.000 description 1
- ZTWTYVWXUKTLCP-UHFFFAOYSA-N vinylphosphonic acid Chemical compound OP(O)(=O)C=C ZTWTYVWXUKTLCP-UHFFFAOYSA-N 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/11—Lapping tools
- B24B37/20—Lapping pads for working plane surfaces
- B24B37/24—Lapping pads for working plane surfaces characterised by the composition or properties of the pad materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/34—Laser welding for purposes other than joining
- B23K26/342—Build-up welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/20—Post-treatment, e.g. curing, coating or polishing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
- B29C64/112—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using individual droplets, e.g. from jetting heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacturing & Machinery (AREA)
- Plasma & Fusion (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
本公开内容的实施方式通常涉及使用增材制造处理形成的结构,且更特定而言,涉及抛光垫及用于制造抛光垫的方法,这些抛光垫可用于化学机械抛光(CMP)处理。本文描述的结构由多个印刷层形成。该结构包括具有第一材料成分的第一材料域及具有第二材料成分的多个第二材料域,该第二材料成分不同于该第一材料成分。在同等力被施加到该第一材料域及该多个第二材料域的顶表面上时,该第一材料域被配置为具有第一移除速率,且该多个第二材料域被配置为具有不同的第二移除速率。
Description
技术领域
本公开内容的实施方式一般涉及使用增材制造处理形成的结构,且更特定而言,涉及用于电子元件处理中的基板的化学机械抛光(chemical mechanical polishing;CMP)的抛光垫。
背景技术
化学机械抛光(CMP)是一种已在诸多不同行业中用于平坦化基板表面的常规处理。例如,CMP通常用于制造高密度集成电路,以平坦化或抛光沉积在半导体基板上的材料层。在CMP期间,基板(如硅晶片)安装在载体头上,其中器件表面抵靠旋转抛光垫放置。载体头在基板上提供可控的负载,以推动器件表面抵靠抛光垫。抛光液(如含有磨粒的浆料)被提供给移动的抛光垫及抛光头的表面。抛光垫及抛光头向基板施加机械能,同时抛光垫也有助于控制在抛光期间与基板相互作用的浆料的传输。
抛光垫具有表面微纹理或粗糙结构,其允许磨料捕获及浆料传输,并影响表面机械特性。抛光垫的表面纹理及表面及整体机械特性(例如,弹性、回弹、硬度及刚度)及CMP处理条件对集成电路(integrated circuit;IC)裸片等级(微观/纳米级)及晶片或全局等级(宏观)的CMP抛光性能皆有显著影响。例如,CMP处理力及条件(如垫压缩、垫回弹、摩擦、处理期间的温度变化及研磨性含水浆料化学物种)会影响抛光垫的性质,且从而影响CMP性能。
在每个CMP处理步骤中,抛光垫暴露于压缩及回弹循环、加热及冷却循环及研磨浆料化学物种中。最终,在抛光一定数量的基板后,抛光垫会变得磨损或“光滑(glazed)”,且随后需要更换或修复。在抛光处理循环期间的不同时间,垫调节盘(例如,镶金刚石磨盘)被推动抵靠并扫过整个抛光表面,以研磨及重新生成抛光垫的表面。使用垫调节盘在常规抛光垫上重新生成的表面纹理基本上是随机的,并且因此是高度不可预测且难以控制的。
因此,本领域需要提供对垫表面纹理的控制及垫表面纹理的原位重新生成的抛光垫及制造抛光垫的方法。需要此种改进以在微观等级及宏观等级上(如在整个基板上)产生改进的抛光均匀性。
发明内容
本发明的实施方式一般涉及使用增材制造处理形成的结构,更具体而言,涉及可用于化学机械抛光(CMP)处理的抛光垫及制造抛光垫的方法。
在一个实施方式中,一种结构包括多个印刷层。该结构包括具有第一材料成分的第一材料域及具有第二材料成分的多个第二材料域,该第二材料成分不同于该第一材料成分。在同等力被施加到该第一材料域及该多个第二材料域的顶表面时,该第一材料域被配置为具有第一移除速率,且该多个第二材料域被配置为具有不同的第二移除速率。
在另一实施方式中,一种重新生成表面纹理的方法包括改变结构顶表面的表面纹理,包括在一个或多个特定应用处理中使用该结构。该结构由多个印刷层形成,且在改变之前,表面纹理包括在该结构的顶表面中形成的多个示例性特征。该方法包括向该结构的顶表面施加处理或力,以重新生成包括多个示例性特征的表面纹理。
在另一实施方式中,一种结构包括多个印刷层。该结构包括第一材料域及第二材料域,第一材料域包括具有第一材料配方的第一多个子域,且第二材料域包括具有第二材料配方的第二多个子域,该第二材料配方不同于第一材料配方。第二材料域的至少一部分被配置为通过施加到结构顶表面的处理或力以不同于第一材料域的速率被选择性地移除,从而在顶表面上重新生成表面纹理。
附图说明
为便于详细理解本公开内容的上述特征,可参考实施方式获得上文简要概述的本公开内容的更具体的描述,其中一些实施方式在附图中进行了说明。然而应注意,附图仅示出了本公开内容的典型实施方式,因此不应被认为是对其范围的限制,因为本公开内容可允许其他等效的实施方式。
图1A为根据本文所述的一个或多个实施方式的3D印刷结构的一部分的示意性俯视图。
图1B-图1D为根据本文所述各种实施方式的沿图1A的剖面线1-1'截取的3D印刷结构的一部分的示意性横截面图。
图2为根据本文所述的一个或多个实施方式的用于重新生成3D印刷结构的表面纹理的方法的示意图。
图3A-图3C为根据本文所述一个或多个实施方式的在方法的不同阶段的3D印刷结构的示意性横截面图。
图4A是根据本文所述的一个或多个实施方式的用于施加剪切力的垫调节组件的示意图。
图4B为根据本文所述一个或多个实施方式的喷水设备的示意图。
图4C为根据本文所述一个或多个实施方式的辐射设备的示意图。
图5为被配置为使用根据本文所述的一个实施方式或实施方式组合而形成的抛光垫的抛光系统的示意性侧视图。
图6A为根据本文所述的一个或多个实施方式的抛光垫的一部分的示意性透视截面图。
图6B是根据一个实施方式的图6A所示的抛光垫的抛光垫表面的一部分的示意性放大俯视图。
图7A为根据本文所述的一个或多个实施方式的抛光垫的一部分的示意性透视截面图。
图7B是根据一个实施方式的图7A所示的抛光垫的抛光垫表面一部分的示意性放大俯视图。
图8A为根据本文所述一个或多个实施方式或其组合的可用于制造抛光垫的增材制造系统的示意性截面图。
图8B为示意性图示了根据本文所述的一个或多个实施方式或其组合的设置在先前形成的印刷层表面上的液滴的放大横截面图。
图9为阐述根据一个或多个实施方式的形成抛光垫印刷层的方法的示意图。
为便于理解,尽可能使用相同的附图标记来表示图中共用的元件。可预期,在一个实施方式中公开的元件可有益地用在其他实施方式上,而无需具体叙述。
具体实施方式
本文所述的实施方式一般涉及使用增材制造处理形成的结构,且更具体而言,涉及抛光垫及制造抛光垫的方法,该抛光垫可用于化学机械抛光(CMP)处理中。特定而言,本文所述的结构及抛光垫的特征在于空间排列的材料域,这些域被配置为原位重新生成表面纹理。
通常,本文所述方法使用增材制造系统,例如2D或3D喷墨打印机系统,以逐层处理地形成(印刷)3D印刷结构的至少某些部分。典型地,每个印刷层通过在制造支撑件或先前形成的印刷层上顺序沉积并至少部分固化至少两种不同预聚合物(pre-polymer)或其他材料成分的相应液滴而形成(印刷)。有利的是,本文阐述的增材制造系统及方法能够在每个印刷层内(x-y分辨率)进行至少微米级的液滴位置控制及在每个印刷层的厚度上(z分辨率)进行微米级(0.1μm至200μm)的控制。由本文阐述的增材制造系统及方法提供的微米级x-y及z分辨率有助于形成至少两个不同材料域的期望且可重复的图案,每个材料域具有独特的性质及属性。因此,在一些实施方式中,本文阐述的形成3D印刷结构的方法还赋予由其形成的3D印刷结构一个或多个独特的结构特征。
本文公开的实施方式提供了对垫表面纹理的控制及垫表面纹理的原位重新生成。这些优点至少部分是通过本文公开的装置和/或方法实现的,这些装置和/或方法能够通过增材制造将具有不同性质的材料精确放置在材料基质中;在每个方向上调谐材料基质,以促进调节处理期间材料位移的程度;及具有预测及控制由调节处理产生的处理后表面纹理的能力。
图1A为根据本文所述的一个或多个实施方式的3D印刷结构100的一部分的示意性俯视图。3D印刷结构100的顶表面102包括第一材料域104及多个第二材料域106。如图1A所示,当从上方观察时,第二材料域106具有正方形截面形状。然而,设想当从上方观察时,第二材料域106可具有任何期望的截面形状,包括不规则形状。在某些实施方式中,第一及第二材料域104、106中的一者或两者具有约100μm或更大的至少一个横向尺寸(即,在x-y平面中测量),如约100μm至约10mm,如约100μm至约5mm,如约100μm至约1mm,如约100μm至约500μm。在一些实施方式中,第一及第二材料域104、106的一个或多个横向尺寸在整个顶表面102上是变化的,以调谐硬度、机械强度、流体传输特性或其他期望的材料域特性。可设想每个域104、106可由单一材料或多种不同材料的复合材料形成。通常,第一及第二域104、106具有不同的材料配方和/或不同的材料特性。在某些实施方式中,第一及第二域104、106包括一种或多种不同的材料。亦可设想即使当两个域104、106两者都包括相同的材料或材料成分时,不同的材料配方也可存在于域104、106之间,仅在各自的域内具有不同的相对浓度和/或分布。在某些实施方式中,不同的材料特性可取决于一个或多个处理参数,如UV固化的速度或持续时间的差异,此将在下文中参照图8A进行更详细的描述。
在图1A中,第一及第二域104、106被图案化,以使得第一域104形成大体上跨越3D印刷结构100的顶表面102的整个长度或宽度的互连网络。相反,多个第二域106插入在第一域104的区域之间,并由与相同材料的一个或多个其他区域不相连的离散区域所组成。尽管图1A示出了其中一个域插入在另一个域中的区域之间的实施方式,但第一及第二域104、106并不特定限定于所示的实施方式。例如,可设想两个域可互连,或者两个域都可由离散的区域组成。在某些实施方式中,图1A所示的图案大体上在整个3D印刷结构100上延伸。
图1B-图1D为根据本文所述各种实施方式的沿图1A的剖面线1-1'截取的3D印刷结构100的一部分的示意性横截面图。共同参照图1B-图1D,3D印刷结构100b-d包括垂直堆叠(例如,在z方向上)的多个印刷层108。可设想每个印刷层108可具有沿z轴测量的约2μm至约10μm的厚度。具体参考图1B,多个印刷层108通过x-y平面(即,横向)中的均匀材料放置而被相同地映射,使得第一及第二域104、106中的每一者均匀地堆叠在与印刷层108正交的垂直构建平面中。在本文中,x-y平面是水平的,而z轴是垂直的。图1B示出了多个印刷层108相对于y轴彼此对齐,且尽管图1B中未示出,但是多个印刷层108也相对于x轴彼此对齐。
相比之下,具体参考图1C,多个印刷层108相对于x-y平面周期性或间歇性地偏移,使得第一及第二域104、106在垂直构建平面中非均匀堆叠。在对顶表面102施加应力(例如,处理或力)的调节处理期间(此将在下文更详细地描述),多个印刷层108的间歇偏移对被移除的层的数量及深度施加了结构限制。因此,间歇偏移向调节处理添加了额外的控制旋钮,以重新生成3D印刷结构100c的表面纹理。在图1C中,图案的位置每5层或者每约10μm到约50μm偏移一次。然而,可设想在形成任意数目的层之后偏移位置。尽管图1C示出了多个印刷层108的偏移在相对于y轴的两个位置之间来回交替,但可设想多个印刷层108的偏移可以是随机的或者在一个方向上连续移动。尽管在图1C中未示出,但可设想,相对于x轴,多个印刷层108可相对于彼此偏移或对齐,而不会影响图1B-图1C的实施方式之间更一般的结构及功能差异,此将在下文更详细地描述。尽管图1C图示相邻区段中的第二域106不重叠,但设想可能出现一些重叠。然而,可能期望对重叠进行限制,使得被移除的层的数目及深度被保持为仅限于垂直构建平面的偏移层的相邻区段上方的区段。
具体参看图1D,在3D印刷结构100d中引入了多个低粘附力层或分离层。在图1D中,低粘附力层110在x-y平面中取向。每个低粘附力层110内的结合(诸如x-y平面中的横向交联)及内聚力、粘附力或两者防止每个低粘附力层110内部分离或破裂。然而,与低粘附力层110内的结合相比,每个低粘附力层110与周围层108之间的垂直结合相对较弱。因此,在将应力施加到顶表面102的调节处理期间(此将在下文更详细地描述),多个低粘附力层110中的一个上层被配置为与周围层108分离(归因于两者之间的弱结合),且低粘附力层110被配置为作为单片被移除(归因于低粘附力层110内相对强的结合)。在某些实施方式中,低粘附力层110包括可溶解以进一步削弱每个低粘附力层110与周围层108之间的结合的材料。因此,该效果类似于上文关于3D印刷结构100c描述的实施方式,即多个低粘附力层110对在调节处理期间被移除以重新生成3D印刷结构100d的表面纹理的层的数目及深度施加结构限制。存在于层内及层间的可变结合强度可被选择,以向3D印刷结构100d提供期望的材料特性及对调节处理的响应。可设想材料之间结合强度的差异可能是不同量的交联造成的。例如,可设想低粘附力层110内的横向交联可超过低粘附力层110与周围层108之间的垂直交联。可设想,作为如图1D所示在x-y平面中取向的替代,低粘附力层110可沿着z轴取向,以在3D印刷结构的不同域之间产生垂直分离。
图2为根据一个或多个实施方式的用于重新生成3D印刷结构300的表面纹理的方法200的示意图。图3A-图3C为根据一个或多个实施方式的在方法200的不同阶段的3D印刷结构300的示意性截面图。可设想本文公开的装置和/或方法可用于各种应用中,这些应用将通过提供具有可原位重新生成的表面纹理的3D结构而受益。例如,潜在的应用包括CMP垫、精密光学装置、金属抛光、高级接触表面清洁、组织工程改造、纹理化抗微生物表面、药物输送系统及诸多其他应用。
在操作202(图3A)中,根据设计规范,提供具有设计表面纹理310或表面轮廓的3D印刷结构300。在本文中,设计表面纹理310包括形成在顶表面302中的多个示例性特征,如凹槽312。如图3A所示,顶表面302相对于x-y平面是大体上平坦的。在图3A所示的实施方式中,凹槽312具有10层或约20μm至约100μm的设计深度d1。然而,可设想设计深度d1可以是1至25层,如1至5层,如5至10层,如10至15层,如15至20层,如20至25层,其对应于约2μm至约250μm的域尺寸。尽管在图3A中示出了凹槽312,但可设想,其他示例性特征可包括阱、通道或脊等。
在操作204(图3B)中,3D印刷结构300的顶表面302的设计表面纹理310在一个或多个特定应用处理中使用3D印刷结构300时被改变。如图3B所示,顶表面302具有改变的表面纹理314,其中顶表面302相对于x-y平面不再大体上平坦。相反,顶表面302具有包括多个接触粗糙体318的波状拓扑结构。本文使用的术语“接触粗糙体(contact asperity)”是指顶表面302的被配置为接触基板的特定部分。此外,凹槽312的深度从设计深度d1减小到较小的深度d2。
在操作206中,对3D印刷结构300的顶表面302施加处理或力316,以重新生成包括多个示例性特征的设计表面纹理310。处理或力316以不同于第一域104的速率选择性地从第二域106移除层308。例如,在图3C所示的实施方式中,通过使用调节盘的常规研磨处理来平坦化第一域104,该调节盘将一个或多个接触粗糙体318平坦化,并从顶表面302移除材料,而不选择性地从第一域104抬出(lift out)整个层。另一方面,处理或力316的施加从第二域106均匀地移除或抬出一个或多个的整层308。通常,从第二域106抬出的用于恢复凹槽312的区域在x-y平面中的尺寸由多个印刷层108的图案决定。相比之下,可设想从第二域106抬出的区域的垂直尺寸可取决于一个或多个处理参数(例如,剪切力)。尽管图3C示出了从第二域106移除10层,但是可设想移除的层数可以是从1至20层,诸如1至5层,诸如5至10层,诸如10至20层,或者总厚度约等于设计深度d1的层数。在某些实施方式中,在操作206期间,仅最顶部的2um到10um被修改。在图3C所示的实施方式中,从第二域106移除的层数由施加到顶表面302的处理或力316的大小控制。例如,当施加剪切力时(图4A),移除率和/或移除深度取决于剪切力的大小。
在某些其他实施方式中,从第二域106中移除的层数至少部分受多个印刷层相对于x-y平面的间歇移动所施加的结构限制所控制。例如,与从图3C的3D印刷结构300抬出10层相比,在操作206向图1C的3D印刷结构100c施加相同的处理或力316可导致第二域106仅被抬出5层。因此,图1C所示的多个印刷层108的图案变化有效地防止了相邻区段的第二域106中的层在操作206期间被移除。通常,将方法200应用于如上所述的3D印刷结构300的结果是,顶表面302的平坦拓扑及凹槽312的设计深度d1恢复到设计规格或一些其他期望的规格。
使用本文公开的装置和/或方法,通过经由施加至表面的处理或力来选择性移除或移位表面某些区域中的数个层,可以在任何时间点重新生成3D印刷结构的包括其中存在的一个或多个示例性特征的表面纹理。换言之,一个或多个层的一些部分可被选择性地移除,而相同层的其他部分则被保留。举例而言,在图3A-图3C中图示的实施方式中,第二域106被选择性地移除,同时基本上保留第一域104。通常,某些部分的选择性移除取决于不同材料相对于彼此的放置,此可被称为不同材料的并置。例如,选择性移除可能取决于相同材料的分子之间的内聚力及不同材料的分子之间的粘附力,以及内聚力及粘附力的相对强度。可设想,材料配方和/或材料特性(例如模数、可混合性、可溶解性及结合性)的调节可能有助于不同程度的材料内聚力及黏合力。也设想材料的内聚力及粘附力可受材料的相对电荷影响,且改变电荷特性和/或电荷密度可实现对某些材料的选择性移除的额外控制。因为前述效应取决于特定的材料类型,包括材料的相对浓度、分布及并置,因此通过在x-y平面(层内)及垂直构建平面(层间)中的材料放置,可将内聚力及粘附力的差异设计到3D印刷结构中。
使用本文公开的设备和/或方法,可将低粘附力层引入3D印刷结构中以能够选择性移除低粘附力层。因此,经由低粘附力层附着到3D印刷结构的其他层也被选择性地移除。例如,在图1D所示的实施方式中,移除上部低粘附力层110导致设置在上部低粘附力层110与顶表面102之间的多个印刷层108被移除。此举是通过材料放置来在3D印刷结构中设计疲劳点或弱点的一个示例。
在某些实施方式中,处理或力316包括剪切力(图4A)、水喷射处理(图4B)或辐射能处理(图4C)中的至少一种,下文将对其进行更详细的描述。在某些实施方式中,可组合多于一个的处理或力316来帮助重新生成设计表面纹理310。举例而言,设想可首先将辐射处理应用于顶表面302以修改影响第一及第二域104、106中的至少一者的内聚力或粘附力的一中或多种材料性质(例如,聚合物交联),从而为施加剪切力来实际移除受影响的层308做准备。也可设想,可首先对顶表面302应用水喷射处理,以部分溶解第一或第二域104、106的一者,从而为施加剪切力来实际移除受影响的层308做准备。
图4A为用于对顶表面302施加剪切力的示例性垫调节组件410的示意图。垫调节组件410包括调节臂412及致动器414及416,致动器414及416被配置为促使垫调节盘418(例如,镶金刚石磨盘)被推抵并扫过3D印刷结构300的顶表面302。在某些实施方式中,垫调节盘418具有类似于金刚石或碳化硅的硬度,如具有约9或更大的莫氏硬度等级。
图4B为示例性喷水设备420的示意图。喷水设备420包括臂422,臂422具有多个喷嘴424,这些喷嘴424安置在远端,并被配置为将水射流426施加到3D印刷结构300的顶表面。
图4C为示例性辐射设备430的示意图。设备430包括臂432,臂432具有辐射源434,辐射源434安置在远端的并被配置为产生辐射能436,辐射能436被导向3D印刷结构300的顶表面302。在某些实施方式中,辐射能436包括激光、紫外光、可见光或微波等中的至少一种。
抛光垫示例
可设想用于基板处理的CMP抛光垫可受益于本文所公开的设备和/或方法。尽管本文所述的实施方式一般系关于半导体装置制造中使用的CMP垫,但是抛光垫及其制造方法也适用于使用化学活性及化学非活性抛光液和/或不含磨粒的抛光液的其他抛光处理。此外,本文描述的实施方式可单独或组合地用于至少以下行业:航空航天、陶瓷、硬盘驱动器(hard disk drive;HDD)、微机电系统(microelectromechanical system;MEMS)及纳米技术、金属处理、光学及电光学制造及半导体装置制造等。
图5是示例性抛光系统500的示意性侧视图,抛光系统500被配置为使用根据本文所述的一个实施方式或实施方式组合形成的抛光垫。在本文中,抛光系统500的特征在于压板504及基板载体506,压板504具有使用压敏黏合剂固定到其上的抛光垫502。基板载体506面向压板504以及安装在压板504上的抛光垫502。基板载体506用于将安置在其中的基板508的材料表面推向抛光垫502的抛光表面,同时围绕载体轴510旋转。压板504围绕压板轴512旋转,同时旋转的基板载体506从压板504的内径到外径来回扫动,以部分减少抛光垫502的不均匀磨损。
抛光系统500进一步包括流体输送臂514及垫调节器组件516。流体输送臂514位于抛光垫502上方,且用于将抛光液(如其中悬浮有研磨剂的抛光液)输送到抛光垫502的表面。在某些实施方式中,抛光液包含pH调节剂及其他化学活性成分,如氧化剂,以实现对基板508的材料表面的化学机械抛光。垫调节器组件516用于在抛光基板508之前、之后或期间,通过将固定的研磨调节盘518推靠在抛光垫502的表面上来对抛光垫502进行调节。将调节盘518推靠抛光垫502包括围绕轴520旋转调节盘518,并从压板504的内径到压板504的外径扫动调节盘518。调节盘518用于研磨、复原抛光垫502的抛光表面以及从抛光垫502的抛光表面移除抛光副产品或其他碎屑。
图6A是根据本文所述的一个或多个实施方式的示例性抛光垫600的一部分的示意性透视截面图。图6A绘示了重新生成表面纹理之后(例如,在图2的方法200的操作206之后)的抛光垫600的顶表面602或抛光表面。在某些实施方式中,图6A所示的顶表面602的表面纹理大体上在整个抛光垫600上延伸。抛光垫600的顶表面602包括多个抛光表面604,在这些抛光表面604之间限定了多个通道606。通常,多个通道606用于在抛光处理期间储存及分配浆料。多个通道606包括多个主通道及次通道,这些主通道及次通道大体上相互正交对准。在图6A所示的实施方式中,主通道通常在x轴方向上对齐,并形成在相邻的抛光表面604之间,将抛光表面604沿着y轴彼此隔开。次通道通常在y轴方向上对齐,并形成在相邻的抛光表面604之间,将抛光表面604沿着x轴彼此间隔开。在某些实施方式中,多个通道606中的每一个的宽度608为约100μm至约1000μm,如约200μm至约800μm,如约400μm至约600μm,如约500μm。在某些实施方式中,从多个抛光表面604的一者的顶部到相邻通道606的底部测量的多个通道606中每一个的深度610为约10μm至约100μm,如约20μm至约80μm,如约40μm至约60μm,如约50μm。在某些实施方式中,多个抛光表面604中每一个的宽度612为约200μm至约2000μm,如约400μm至约1600μm,如约800μm至约1200μm,如约1000μm。
图6B是根据一个实施方式的图6A所示的抛光垫600的顶表面602的一部分的示意性放大俯视图。相较于图6A,图6B绘示了重新生成表面纹理之前(例如,在图2的方法200的操作206之前)的抛光垫600的顶表面602。图6B所示的抛光垫600的部分的特征在于由多个第一材料域620及第二材料域630形成的抛光垫材料的连续相。在本文中,空间排列的第一材料域620插入在第二材料域630的区域之间。每个第一材料域620对应于图6A所示的多个抛光表面604中的一个。同样,第二材料域630对应于图6A所示的多个通道606。
第一材料域620及第二材料域630分别由多个单独的子域622及子域632形成。如图6B所示,当从上方观察时,每个子域622、632具有正方形截面形状,具有第一横向尺寸w1及第二横向尺寸w2。然而,设想当从上方观察时,子域622、632可具有任何期望的截面形状,包括不规则形状。横向尺寸w1及w2是平行于表面602的顶部来测量的,且因此平行于x-y平面中的抛光垫600的支撑表面测量。横向尺寸w1及w2由增材制造处理限定,此将在下文更详细地描述。在某些实施方式中,横向尺寸w1及w2为约0.1μm或更大,如约1μm或更大,如约1μm至约40μm。图6B的点阵图图像中绘示的每个子域622、632对应于在增材制造处理期间沉积的单个液滴(下文将更详细地描述)。因此,每个单独的子域622、632具有与相应液滴相关联的特征材料成分,且该材料成分可不同于一个或多个相邻子域622、632的材料成分。
在某些实施方式中,第一及第二材料域620、630由不同的预聚合成分形成,如图8A的描述中所述的示例性预聚合成分,且因此在一中或更多种材料性质上彼此不同。在可与本文公开的其他实施方式相结合的一些实施方式中,第一及第二材料域中的一者或多者包括至少一种金属或陶瓷材料。在一些实施方式中,第一材料域620及第二材料域630的储能模量(storage modulus)E’彼此不同,且可使用合适的测量方法(如纳米压痕)来测量该差异。在一些实施方式中,多个第一材料域620具有相对低的储能模量E’,而第二材料域630具有相对中等或相对高的储能模量E’。表1总结了在约30摄氏度温度下低、中及高储能模量E’材料域的特性(E’30)。
表1
在一些实施方式中,第一材料域620与第二材料域630之间的储能模量E’30的比值大于约1∶2、大于约1∶5、大于约1∶10、大于约1∶50,例如大于约1∶100。在一些实施方式中,第一材料域620及第二材料域630之间的储能模量E’30的比值大于约1∶500,例如大于1∶1000。
在图6B所示的实施方式中,第一材料域620仅包含低模量材料M2,使得第一材料域620内的单独子域622中的每一者具有相同的材料成分。因此,第一材料域620的储能模量E’大体上等于每个单独子域622的储能模量E’。相比之下,第二材料域630包括混合模量复合材料,其中单独子域632具有多种不同的材料成分。在本文中,第二材料域630包括插入在具有高模量材料M1与低模量材料M2的交替图案的区域之间的成孔剂材料M3的块。本文所用术语“成孔剂”是指任何形成孔的材料成分,如暴露于调节流体时溶解的可溶性牺牲材料,从而在第二材料域630内形成对应的多个孔。在某些实施方式中,成孔剂材料M3用诸如水的液体排空。每个单独的子域632的相对密度及图案化决定了第二材料域630的总储能模量E’。在一些其他实施方式中(未示出),第二材料域630仅包括高模量材料M1。
尽管图6B仅显示抛光垫600的顶层,但设想当从侧面观察时,抛光垫600可具有类似于图1B、图1C或图1D的结构。换言之,第一及第二域620、630可均匀地堆叠在垂直构建平面中的层之间,第一及第二域620、630可间歇地偏移且不均匀地堆叠在垂直构建平面中的层之间,一个或多个低粘附力层可沿着垂直构建平面在选定深度处引入到第一及第二域620、630之间,或者上述各者的组合。
参考图6B,在对顶表面602施加应力(例如,处理或力)的调节处理期间(例如,根据图2的方法200的操作206),第二域630被选择性地移除,同时基本上保留第一域620。第二域630的选择性移除导致了图6A所示的结构。可设想,可使用本文描述的任何设备来施加应力,如参照图4A-图4C描述的一个或多个设备。
图7A是根据本文所述的一个或多个实施方式的示例性抛光垫700的一部分的示意性透视截面图。图7A绘示了重新生成表面纹理之后(例如,在图2的方法200的操作206之后)的抛光垫700的顶表面702。在某些实施方式中,图7A所示的顶表面702的表面纹理大体上在整个抛光垫700上延伸。抛光垫700的顶表面702包括多个抛光表面704,抛光表面704中限定有多个阱706。多个阱706凹入顶表面702下方。通常,多个阱706用于在抛光期间储存及分配浆料。在本文中,当从上方观察时,多个阱706具有圆形形状。然而,可设想当从上方观察时,多个阱706可具有任何期望的形状,包括不规则形状。在本文中,阱706在底部是圆形的且具有平缓倾斜的侧面。然而,可设想当从侧面观察时,多个阱706可具有任何期望的截面轮廓,包括平坦的底部和/或侧面。在某些实施方式中,多个阱706中的每一者的宽度708为约100μm至约1000μm,如约200μm至约800μm,如约400μm至约600μm,如约500μm。在某些实施方式中,从多个抛光表面704的一者的顶部到相邻阱706的底部测量的多个阱706中的每一者的深度710为约20μm至约120μm,如约40μm至约120μm,如约60μm至约100μm,如约60μm。在某些实施方式中,多个抛光表面704中的每一者的宽度712为约200μm至约2000μm,如约400μm至约1600μm,如约800μm至约1200μm,如约1000μm。
图7B是根据一个实施方式的图7A所示的抛光垫700的顶表面702的一部分的示意性放大俯视图。相较于图7A,图7B绘示了重新生成表面纹理之前(例如,在图2的方法200的操作206之前)的抛光垫700的顶表面702。图7B所示的抛光垫700的部分的特征在于由多个第一材料域720及第二材料域730形成的抛光垫材料的连续聚合物相。在本文中,空间排列的第一材料域720插入在第二材料域730的区域之间。每个第一材料域720对应于图7A所示的多个阱706中的一者。同样,第二材料域730对应于图7A所示的多个抛光表面704。第一材料域720及第二材料域730分别由多个单独的子域722及子域732形成,这些子域类似于参照图6B描述的子域。因此,图6B的子域622、632的相应描述不受限地并入此处。
在图7B所示的实施方式中,第一材料域720及第二材料域730包括混合模量复合材料,其中单独子域722、732具有多种不同的材料成分。在本文中,第一材料域720包括高模量材料M1及低模量材料M2的交替图案。相较之下,第二材料域730包括插入在低模量材料M2区域之间的成孔剂材料M3的块。单独子域722、732中的每一个的相对密度及图案化分别决定了第一及第二材料域720、730的总储能模量E’。在一些其他实施方式中(未示出),第一材料域720仅包括高模量材料M1。在某些实施方式中,高模量材料M1具有在室温下测量的约1600MPa的储能模量。在某些实施方式中,低模量材料M2具有在室温下测量的约4MPa的储能模量。
尽管图7B仅显示抛光垫700的顶层,但设想从侧面观察时,抛光垫700可具有类似于图1B、图1C或图1D的结构。换言之,第一及第二域720、730可均匀地堆叠在垂直构建平面中的层之间,第一及第二域720、730可间歇地偏移且不均匀地堆叠在垂直构建平面中的层之间,一个或多个低粘附力层可在沿着垂直构建平面的选定深度处引入到第一及第二域720、730之间,或者上述各者的组合。
参考图7B,在对顶表面702施加应力的调节处理期间(例如,根据图2的方法200的操作206),第一域720被选择性地移除,同时基本保留第二域730。第一域720的选择性移除导致图7A中所示的结构。可设想,可使用本文描述的任何设备来施加应力,如参照图4A-图4C描述的一个或多个设备。
上述抛光垫600、700中的每一者均具有至少一个相对低储能模量E’的域(即图6B中的域620及图7B中的域730)及至少一个相对高储能模量E’的域(即图6B中的域630及图7B中的域720)。在两个实施方式中,在调节处理期间,相对高储能模量E’而域被选择性地移除,从而得到图6A及图7A所示的结构。因此,调节处理后形成在顶表面602、702上的接触粗糙体分别具有与抛光垫600及抛光垫700的总储能模量E’相比相对较低的储能模量E’。因此,通过使用本文所公开的设备和/或方法,可设想每个抛光垫600、700的块状基质或支架可被制成具有相对高的刚性,而其抛光表面与块状基质相比可具有更有利于接触及抛光基板(例如,更不易于刮擦或引起其他抛光垫所致的缺陷)的独特性质(例如,相对低的储能模量E’)。
图8A为根据一些实施方式的可用于形成本文所述抛光垫的增材制造系统的示意性截面图。在本文中,增材制造系统800的特征在于可移动制造支撑件802、安置在制造支撑件802上方的多个分配头804及806、固化源808及系统控制器810。在一些实施方式中,在抛光垫制造期间,分配头804、806彼此独立并独立于制造支撑件802移动。第一及第二分配头804及806流体耦接到对应的第一及第二预聚合成分源812及814,这些源分别提供第一及第二预聚合成分。
在一些实施方式中,增材制造系统800的特征在于第三分配头(未示出),其流体耦接到牺牲材料前驱物源(例如,成孔剂材料)(未示出)。在一些实施方式中,增材制造系统800包括所需数量的分配头,用于各自分配不同的预聚合成分或牺牲材料前驱物成分。在一些实施方式中,增材制造系统800进一步包括多个分配头,其中两个或更多个分配头被配置为分配相同的预聚合成分或牺牲材料前驱物成分。
此处,分配头804,806中的每一者的特征在于液滴喷射喷嘴816的阵列,喷嘴816被配置为喷射输送至分配头储槽的相应预聚合成分的液滴830、832。在本文中,液滴830、832朝向制造支撑件喷射,并因此喷射到制造支撑件802上或设置在制造支撑件802上的先前形成的印刷层818上。分配头804、806中的每一个被配置为以独立于分配头的其他喷嘴816的喷射的方式以各自的几何阵列或图案从喷嘴816中的每一者喷射液滴830、832(控制液滴的喷射)。在本文中,当分配头804、806相对于制造支撑件802移动时,喷嘴816根据待形成的印刷层(例如印刷层824)的液滴分配图案而独立地喷射。一旦进行了分配,液滴830、832通过暴露于由电磁辐射源(如紫外辐射源808)提供的电磁辐射(例如紫外辐射826)而被至少部分固化,以形成印刷层,如部分形成的印刷层824。
在一些实施方式中,所分配的液滴830、832暴露于电磁辐射下,以在液滴扩散至平衡尺寸之前对液滴进行物理固定,如图8B所述。在某些实施方式中,分配的液滴830、832暴露于电磁辐射,以在液滴接触表面(如制造支撑件802的表面或设置在制造支撑件802上的先前形成的印刷层818的表面)的1秒或更短的时间内至少部分地固化液滴的预聚合成分。通常,固定液滴也期望地通过防止该液滴与设置在其附近的其他液滴聚结来在表面上固定分配的液滴的位置。此外,固定分配的液滴有益地阻止或基本上防止预聚合物成分扩散穿过相邻设置的不同预聚合成分液滴的界面区域。因此,可期望地控制不同预聚合成分液滴的混合,以在相邻设置的不同材料域之间提供相对明显的材料性质过渡。例如,在一些实施方式中,相邻设置的不同材料域之间的通常包括不同前驱物成分的一些混合的一个或多个过渡区域具有小于约50μm的宽度(未示出),如小于约40μm、小于约30μm、小于约20μm,例如小于约10μm。可能期望允许在相邻设置的不同材料域的液滴之间发生一些互混,以便改善粘附力,此可抑制或防止在界面处发生破裂。
图8B为根据一些实施方式的示意性说明设置在先前形成的层(如图8A所示的先前形成的印刷层818)的表面818a上的液滴832的放大截面图。在增材制造期间,预聚合成分的液滴(如液滴832a)从液滴832a接触表面818a的时刻起的约一秒钟内扩散并到达与先前形成的层的表面818a的平衡接触角α。平衡接触角α至少是预聚合成分的材料性质与先前形成的层(例如,先前形成的印刷层818)的表面818a处的能量(表面能)的函数。在一些实施方式中,需要在分配的液滴达到平衡尺寸之前至少部分地固化该液滴,以便固定液滴与先前形成的层的表面818a的接触角。在那些实施方式中,固定液滴832b的接触角θ大于相同预聚合成分的液滴832a的被允许扩散至其平衡尺寸的平衡接触角α。
在本文中,至少部分地固化分配的液滴830、832导致液滴内的第一及第二预聚合成分中的每一种至少部分地聚合(例如,交联),并与相同预聚合成分的相邻设置的液滴分别形成不同的第一及第二聚合物域,如本文所述的第一及第二材料域。此外,至少部分地固化第一及第二预聚合成分导致第一及第二预聚合成分在第一及第二预聚合成分的相邻设置的液滴之间的界面区域处至少部分共聚。第一及第二预聚合成分的至少部分聚合延迟或基本上防止预聚物成分扩散穿过不同预聚合成分的相邻液滴的界面边界区域,从而允许精细控制液滴之间的互混。换言之,至少部分地固化分配的液滴830、832导致液滴内的第一及第二预聚合成分的至少部分聚合,相邻设置的液滴之间的第一及第二预聚合成分的至少部分共聚,及液滴830、832与相邻设置在其下方的先前形成的印刷层818的至少部分固化的材料之间的至少部分聚合或共聚。
在可与本文所述的其他实施方式组合的一些实施方式中,第一及第二预聚合成分各自包含官能聚合物、官能低聚物、官能单体、反应性稀释剂及光引发剂的一种或多种的混合物。
可用于形成所述至少两种预聚合成分中的一者或两者的合适官能聚合物的示例包括多官能丙烯酸酯,其包括二、三、四及更高官能度的丙烯酸酯,诸如1,3,5-三丙烯酰六氢-1,3,5-三嗪或三羟甲基丙烷三丙烯酸酯。
可用于形成至少两种预聚合成分中的一者或两者的合适官能低聚物的示例包括单官能及多官能低聚物、丙烯酸酯低聚物,如脂族聚氨酯丙烯酸酯低聚物、脂族六官能聚氨酯丙烯酸酯低聚物、二丙烯酸酯、脂族六官能丙烯酸酯低聚物、多官能聚氨酯丙烯酸酯低聚物、脂族聚氨酯二丙烯酸酯低聚物、脂族聚氨酯丙烯酸酯低聚物、脂族聚酯聚氨酯二丙烯酸酯与脂族二丙烯酸酯低聚物的共混物或上述各者的组合,例如双酚A乙氧基二丙烯酸酯或聚丁二烯二丙烯酸酯、四官能丙烯酸酯聚酯低聚物、及脂族聚酯基聚氨酯二丙烯酸酯低聚物。
可用于形成至少两种预聚合成分中的一者或两者的合适单体的示例包括单官能单体及多官能单体。合适的单官能单体包括丙烯酸四氢糠酯(例如,来自的SR285)、甲基丙烯酸四氢糠酯、乙烯基己内酰胺、丙烯酸异冰片酯、甲基丙烯酸异冰片酯、2-苯氧基乙基丙烯酸酯、2-(2-乙氧基乙氧基)丙烯酸乙酯、丙烯酸异辛酯、丙烯酸异癸酯、甲基丙烯酸异癸酯、丙烯酸月桂酯、甲基丙烯酸月桂酯、丙烯酸硬脂酯、甲基丙烯酸硬脂酯、环状三羟甲基丙烷甲缩醛丙烯酸酯、2-[(丁胺基)羰基]氧基]丙烯酸乙酯(例如,来自美国RAHN公司的Genomer 1122)、3,3,5-三甲基环己烷丙烯酸酯,或单官能甲氧基化的PEG(350)丙烯酸酯。合适的多官能单体包括二醇及聚醚二醇的二丙烯酸酯或二甲基丙烯酸酯,如丙氧基化新戊二醇二丙烯酸酯、1,6-己二醇二丙烯酸酯、1,6-己二醇二甲基丙烯酸酯、1,3-丁二醇二丙烯酸酯、1,3-丁二醇二甲基丙烯酸酯、1,4-丁二醇二丙烯酸酯、1,4-丁二醇二甲基丙烯酸酯、烷氧基化脂族二丙烯酸酯(例如来自/>的SR9209A)、二甘醇二丙烯酸酯、二甘醇二甲基丙烯酸酯、二丙二醇二丙烯酸酯、三丙烯二醇二丙烯酸酯、二缩三乙二醇二甲基丙烯酸酯、烷氧基化己二醇二丙烯酸酯、或上述各者的组合,例如来自/>的SR562、SR563、SR564。
用于形成至少两种不同预聚合成分中的一种或多种的反应性稀释剂至少是单官能度的,且当暴露于自由基、路易士酸和/或电磁辐射时会发生聚合。合适的反应性稀释剂的示例包括单丙烯酸酯、2-丙烯酸乙基己酯、丙烯酸辛基癸酯、环状三羟甲基丙烷甲缩醛丙烯酸酯、丙烯酸己内酯、丙烯酸异冰片酯(IBOA)或烷氧基化的甲基丙烯酸月桂酯。
用于形成至少两种不同预聚合成分中的一种或多种的合适光引发剂的示例包括聚合光引发剂和/或低聚物光引发剂,如安息香醚、苄基缩酮、乙酰苯、烷基苯、氧化膦、二苯甲酮化合物及包含胺增效剂的噻吨酮化合物、或上述各者的组合。
由上述预聚合成分所形成的抛光垫材料的示例可包括有以下项所组成的群组中选择的低聚物或聚合物段、化合物、或材料中的至少一者:聚酰胺、聚碳酸酯、聚酯、聚醚酮、聚醚、聚甲醛、聚醚砜、聚醚酰亚胺、聚酰亚胺、聚烯烃、聚硅氧烷、聚砜、聚苯、聚苯硫醚、聚氨酯、聚苯乙烯、聚丙烯腈、聚丙烯酸酯、聚甲基丙烯酸甲酯、聚氨酯丙烯酸酯、聚酯丙烯酸酯、聚醚丙烯酸酯、环氧丙烯酸酯、聚碳酸酯、聚酯、三聚氰胺、聚砜、聚乙烯材料、丙烯腈丁二烯苯乙烯(ABS)、卤化聚合物、嵌段共聚物及其随机共聚物、及上述各者的组合。
本文所述的一些实施方式进一步包括由牺牲材料(例如,水溶性材料,如二醇(例如,聚乙二醇)、二醇醚及胺)形成的成孔特征。可用于形成本文所述的成孔特征的合适牺牲材料前驱物的示例包括乙二醇、丁二醇、二聚二醇、丙二醇(1,2)及丙二醇(1,3)、辛烷-1,8-二醇、新戊二醇、环己烷二甲醇(1,4-双羟甲基环己烷)、2-甲基-1,3-丙二醇、甘油、三羟甲基丙烷、己二醇-(1,6)、己三醇-(1,2,6)丁三醇-(1,2,4)、三羟甲基乙烷、异戊四醇、对环二己醇、甘露醇和山梨糖醇、甲基糖苷(亦即二甘醇)、三乙二醇、四甘醇、聚乙二醇、二丁二醇,聚丁二醇、乙二醇、乙二醇单丁醚(EGMBE)、二甘醇单乙醚、乙醇胺、二乙醇胺(DEA)、三乙醇胺(TEA)、及上述各者的组合。
在一些实施方式中,牺牲材料前驱物包含水溶性聚合物,如1-乙烯基-2-吡咯啶酮、乙烯基咪唑、聚乙二醇二丙烯酸酯、丙烯酸、苯乙烯磺酸钠、HitenolMaxemul丙烯酸羟乙酯及[2-(甲基丙烯酰氧基)乙基]三甲基氯化铵、3-烯丙氧基-2-羟基-1-丙磺酸钠、4-乙烯基苯磺酸钠、[2-(甲基丙烯酰氧基)乙基]二甲基-(3-磺丙基)氢氧化铵、2-丙烯酰胺基-2-甲基-1-丙磺酸、乙烯基膦酸、烯丙基氯化三苯鏻、(乙烯基苄基)氯化三甲铵、烯丙基氯化三苯鏻、(乙烯基苄基)氯化三甲铵、E-SPERSE RS-1618、E-SPERSE RS-1596、甲氧基聚乙二醇单丙烯酸酯、甲氧基聚乙二醇二丙烯酸酯、甲氧基聚乙二醇三丙烯酸酯、或上述各者的组合。/>
图8A所示的增材制造系统800进一步包括系统控制器810,用于控制该系统的运行。系统控制器810包括可编程中央处理单元(central processing unit;CPU)834,其可与存储器835(例如,非易失性存储器)及支援电路836一起操作。支援电路836通常耦接到CPU834,并包括高速缓存、时钟电路、输入/输出子系统、电源等,及耦接到增材制造系统800的上述各种部件的组合,以便于对系统进行控制。CPU 834是在工业环境中使用的任何形式的通用计算机处理器之一,如可编程逻辑控制器(programmable logic controller;PLC),用于控制增材制造系统800的各种部件及子处理器。耦接到CPU 834的存储器835是非暂时性的,并且可以是一个或多个容易获得的存储器,如随机存取存储器(random accessmemory;RAM)、只读存储器(read only memory;ROM)、软盘驱动器、硬盘或任何其他形式的本地或远程数字储存器。
存储器835是包含指令的计算机可读取储存介质的形式(例如,非易失性存储器),当由CPU 834执行时,促进制造系统800的操作。存储器835中的指令是程序产品形式,如实施本公开的方法的程序。
程序代码可符合多种不同程序设计语言中的任何一种。在一个示例中,本公开内容可被实施为储存在计算机可读取储存介质上以用于和计算机系统一起使用的程序产品。程序产品的程序限定了实施方式的功能(包括本文描述的方法)。
说明性计算机可读储存介质包括但不限于:(i)永久性储存有信息的不可写储存介质(例如,计算机内的只读存储器装置,如可由CD-ROM驱动器读取的CD-ROM光盘、闪存存储器、ROM芯片或任何类型的固态非易失性半导体存储器);及(ii)储存有可变信息的可写储存介质(例如,软盘驱动器中的软盘或硬盘驱动器或任何类型的固态随机存取半导体存储器)。此种计算机可读储存介质在承载指导本文描述的方法的功能的计算机可读指令时,是本公开内容的实施方式。在一些实施方式中,本文阐述的方法或方法中的部分由一个或多个专用集成电路(application specific integrated circuit;ASIC)、现场可编程门阵列(field-programmable gate array;FPGA)或其他类型的硬件实施方案来执行。在一些其他实施方式中,本文阐述的抛光垫制造方法通过软件例程、ASIC、FPGA和/或其他类型的硬件实施方案的组合来执行。
系统控制器810指导制造支撑件802的运动、分配头804及806的运动、启动喷嘴816以从中喷射预聚合成分的液滴、及由紫外辐射源808提供的分配液滴的固化程度及时间。在一些实施方式中,系统控制器用来指导制造系统800的操作的指令包括待形成的每个印刷层的液滴分配图案。在一些实施方式中,液滴分配图案作为CAD相容的数字印刷指令被共同储存在存储器835中。
图9为根据一个或多个实施方式形成抛光垫印刷层的方法的流程图。方法900的实施方式可与本文描述的一个或多个系统及系统操作结合使用,如图8A的增材制造系统800及图8B的固定液滴。此外,方法900的实施方式可用于形成本文所示及所述的3D印刷结构或抛光垫中的任何一者或其组合。
在操作901中,方法900包括根据预定的液滴分配图案,将第一预聚合成分的液滴及第二预聚合成分的液滴分配到先前形成的印刷层的表面上。在本文中,第一预聚合成分不同于第二预聚合成分。例如,在一些实施方式中,第一预聚合成分包括与用于形成第二预聚合成分的单体或低聚物不同的一种或多种单体或低聚物。
在操作902中,方法900包括至少部分地固化第一预聚合成分的分配液滴及第二预聚合成分的分配液滴,以形成包含一种或多种第一材料域及多个第二材料域的至少部分的印刷层。在本文中,至少部分地固化分配的液滴使第一预聚合成分及第二预聚合成分在一个或多个第一材料域及多个第二材料域之间的界面区域处发生共聚,以形成抛光材料的连续聚合物相。一个或多个第一材料域及第二材料域在一种或多种材料性质上彼此具有差异。
在一些实施方式中,方法900进一步包括连续重复操作901及902,以形成沿z方向(即,与制造支撑件表面或其上设置的先前形成的印刷层正交的方向)堆叠的多个印刷层。用于形成每个印刷层的预定液滴分配图案可与用于形成位于其下方的先前印刷层的预定液滴分配图案相同或不同。在一些实施方式中,方法900进一步包括根据预定的液滴分配图案分配牺牲材料或牺牲材料前驱物的液滴,以在一个或多个顺序形成的印刷层中形成多个空间排列的成孔特征的至少部分。
本文所述的方法有益地提供了具有受控且可重复的空间排列的材料域的结构(例如,抛光垫)的制造,这些材料域之间包含不同的材料性质。空间排列材料域的能力允许可重复及受控地制造具有可原位重新生成的表面纹理的结构(例如抛光垫)。
尽管前述内容针对本发明的实施方式,但在不脱离本发明基本范围的情况下,可设计出本发明的其他及进一步的实施方式,其范围由所附权利要求书决定。
Claims (20)
1.一种由多个印刷层形成的结构,所述结构包括:
第一材料域,所述第一材料域具有第一材料成分;及
多个第二材料域,所述多个第二材料域具有不同于所述第一材料成分的第二材料成分,其中
在同等力被施加到所述第一材料域及所述多个第二材料域的顶表面时,所述第一材料域被配置为具有第一移除速率,且所述多个第二材料域被配置为具有不同的第二移除速率。
2.根据权利要求1所述的结构,其中所述第一材料域的所述第一移除速率与所述多个第二材料域的所述第二移除速率之间的差异是基于所述第一材料成分及所述第二材料成分的一个或多个材料性质的差异。
3.根据权利要求1所述的结构,其中所述第一材料域的所述第一移除速率与所述多个第二材料域的所述第二移除速率之间的差异是基于所述第一材料成分和所述第二材料成分中的每一者内的内聚力以及所述第一材料成分和所述第二材料成分之间的粘附力。
4.根据权利要求1所述的结构,其中所述多个第二材料域被插入在所述第一材料域中的区域之间。
5.根据权利要求1所述的结构,其中所述多个第二材料域的所述第二移除速率低于所述第一材料域的所述第一移除速率,从而在所述结构的对应于所述第一材料域的顶表面中形成多个通道。
6.根据权利要求1所述的结构,其中所述多个第二材料域的所述第二移除速率高于所述第一材料域的所述第一移除速率,从而在所述结构的对应于所述多个第二材料域的顶表面中形成多个阱。
7.根据权利要求1所述的结构,其中所述第一材料域及所述第二材料域中的每一者包括多个子域,所述子域对应于在增材制造处理期间沉积的单个液滴。
8.根据权利要求1所述的结构,其中所述结构包括抛光垫,且其中所述结构的顶表面是所述抛光垫的抛光表面。
9.根据权利要求1所述的结构,其中所述结构被配置为用于从由化学机械抛光、精密光学、金属抛光、高级接触表面清洁、组织工程、纹理化抗微生物表面及药物输送系统所组成的群组中选择的至少一个应用中。
10.一种重新生成表面纹理的方法,所述方法包括以下步骤:
改变结构的顶表面的表面纹理,包括在一个或多个特殊应用处理中使用所述结构,其中所述结构由多个印刷层形成,且其中在改变之前,所述表面纹理包括在所述结构的所述顶表面中形成的多个示例性特征;及
向所述结构的所述顶表面施加处理或力,以重新生成包括所述多个示例性特征的所述表面纹理。
11.根据权利要求10所述的方法,其中所述处理或力包括剪切力。
12.根据权利要求10所述的方法,其中所述处理或力包括喷水处理。
13.根据权利要求10所述的方法,其中所述处理或力包括辐射能处理。
14.根据权利要求10所述的方法,其中所述结构包括具有第一材料成分的第一材料域及具有第二材料成分的多个第二材料域,所述第二材料成分不同于所述第一材料成分,且其中向所述结构的所述顶表面施加所述处理或力的步骤以与所述第一材料域不同的速率选择性地移除所述多个第二材料域中的至少一部分。
15.根据权利要求14所述的方法,其中所述处理或力包括水喷射处理或辐射能处理中的至少一者,所述水喷射处理被配置为部分溶解所述第一材料域或所述第二材料域中的至少一者,所述辐射能处理被配置为改变影响所述第一材料域及所述第二材料域中的至少一者的内聚力或粘附力的一种或多种材料性质;所述方法进一步包括以下步骤:在所述水喷射处理或所述辐射能处理的至少一者之后向所述顶表面施加剪切力。
16.一种由多个印刷层形成的结构,所述结构包括:
第一材料域,所述第一材料域包括具有第一材料配方的第一多个子域;及
第二材料域,所述第二材料域包括具有不同于所述第一材料配方的第二材料配方的第二多个子域,其中
所述第二材料域的至少一部分被配置为通过施加到所述结构的顶表面的处理或力以与所述第一材料域不同的速率被选择性地移除,以在所述顶表面上重新生成表面纹理。
17.根据权利要求16所述的结构,其中所述第一材料配方及所述第二材料配方在各自材料域内的材料成分、相对浓度或分布中的至少一个方面不同。
18.根据权利要求16所述的结构,其进一步包含第三材料域,所述第三材料域包含具有不同于所述第一材料配方及所述第二材料配方的第三材料配方的第三多个子域。
19.根据权利要求18所述的结构,其中所述多个印刷层在z方向上堆叠,且其中所述第三材料域包括正交于所述z方向取向的低粘附力层。
20.根据权利要求19所述的结构,其中所述低粘附力层被配置为与所述多个印刷层的周围层分离,以帮助控制所述第一材料域及所述第二材料域的移除深度。
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2022
- 2022-01-21 EP EP22753118.3A patent/EP4291352A1/en active Pending
- 2022-01-21 WO PCT/US2022/013403 patent/WO2022173581A1/en active Application Filing
- 2022-01-21 CN CN202280015948.7A patent/CN116963870A/zh active Pending
- 2022-01-21 KR KR1020237030540A patent/KR20230142595A/ko unknown
- 2022-01-25 TW TW111103068A patent/TW202245979A/zh unknown
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Publication number | Publication date |
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US11878389B2 (en) | 2024-01-23 |
EP4291352A1 (en) | 2023-12-20 |
US20220250203A1 (en) | 2022-08-11 |
TW202245979A (zh) | 2022-12-01 |
KR20230142595A (ko) | 2023-10-11 |
WO2022173581A1 (en) | 2022-08-18 |
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