共查询到19条相似文献,搜索用时 328 毫秒
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介绍了硅场致发射阵列工艺研究的初步结果。应用湿法化学腐蚀、硅锥切削及介质平坦化技术成功地制备出了理想形状的场致发射阵列。 相似文献
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硅超薄可动悬空薄膜的弹性模量测试分析 总被引:1,自引:0,他引:1
利用纳米硬度计通过对超薄悬空薄膜的弯曲试验来测定硅可动悬空薄膜的弹性模量。硅悬空薄膜采用各向异性湿法腐蚀自停止技术制备。纳米硬度计测试方法精确测量了硅悬空薄膜的弯曲形变。试验研究表明,尺寸为2mm×1μm的硅悬空薄膜的弹性模量平均值为152GPa,差异为3.9%-6.8%。 相似文献
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本文研究报道了Pyrex7740玻璃湿法腐蚀通孔技术.将四寸硅玻璃键合圆片的玻璃衬底减薄,并在玻璃上分别制备PECVD SiC、W/Au和PECVD多晶硅三种不同掩膜及其开口,最终利用40% HF腐蚀实现玻璃通孔.整个工艺过程与IC工艺兼容,并可进行圆片级批量加工.观察并研究纵向和横向腐蚀过程和通孔形貌,对比三种不同腐... 相似文献
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为促进表面等离子体谐振(surface plasmon resonance, SPR)测试技术在片上的实现,提出硅基近红外SPR芯片,由硅微棱镜、金属膜和聚合物微流体通道组成.利用有掩膜和无掩膜各向异性湿法腐蚀加工出底角为25.24。的单微硅棱镜阵列,用有掩膜各向异性湿法腐蚀加工出底角为54.74。的双微硅棱镜阵列,利用聚合物的复制注塑技术加工得到微流体通道.在波长1550nm时进行仿真与实验测试,实验测得以空气、水和乙醇为测试介质的SPR角分别为16.75°、22.58°和22.72°,这些值比以玻璃棱镜加工SPR传感器测得的SPR角要小很多.通过实验表明,近红外SPR芯片可以实现表面等离子体谐振传感器微型化,进而推动微全分析系统的实现,降低其成本并提高其性能. 相似文献
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常规的通过干法刻蚀制作纳米梁的方法会不可避免地在梁上引入晶格损伤层。本文提出一种制造无晶格损伤层纳米梁的新工艺方法。在常规光刻后,辅助利用FIB(聚焦离子束)刻蚀修改硅梁中部上方的SiO2掩模。根据单晶硅的材料和工艺特点,通过KOH各向异性腐蚀,硅梁两侧壁与硅片表面垂直,并自停止为(111)面。自停止面自校正地沿112晶向自硅梁中部向两端扩展,直至硅梁成型。经过冷冻干燥,最终在(110)SOI硅片上制得了宽度为112nm的单晶硅纳米梁。自校正的腐蚀方式提升了工艺稳定性,并且由于结合利用了湿法腐蚀和FIB技术,此工艺方法具有无晶格损伤层、工艺重复性好、加工精度高等优点。 相似文献
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《Materials Science and Engineering: R: Reports》2005,48(1):1-46
The wet etching of GaN, AlN, and SiC is reviewed including conventional etching in aqueous solutions, electrochemical etching in electrolytes and defect-selective chemical etching in molten salts. The mechanism of each etching process is discussed. Etching parameters leading to highly anisotropic etching, dopant-type/bandgap selective etching, defect-selective etching, as well as isotropic etching are discussed. The etch pit shapes and their origins are discussed. The applications of wet etching techniques to characterize crystal polarity and defect density/distribution are reviewed. Additional applications of wet etching for device fabrication, such as producing crystallographic etch profiles, are also reviewed. 相似文献
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A combined process of electrochemical formation of self-assembled porous anodic alumina thin films on a Si substrate and Si etching through the pores was used to fabricate ideally ordered nanostructures on the silicon surface with a long-range, two-dimensional arrangement in a hexagonal close-packed lattice. Pore arrangement in the alumina film was achieved without any pre-patterning of the film surface before anodization. Perfect pattern transfer was achieved by an initial dry etching step, followed by wet or electrochemical etching of Si at the pore bottoms. Anisotropic wet etching using tetramethyl ammonium hydroxide (TMAH) solution resulted in pits in the form of inverted pyramids, while electrochemical etching using a hydrofluoric acid (HF) solution resulted in concave nanopits in the form of semi-spheres. Nanopatterns with lateral size in the range 12-200?nm, depth in the range 50-300?nm and periodicity in the range 30-200?nm were achieved either on large Si areas or on pre-selected confined areas on the Si substrate. The pore size and periodicity were tuned by changing the electrolyte for porous anodic alumina formation and the alumina pore widening time. This parallel large-area nanopatterning technique shows significant potential for use in Si technology and devices. 相似文献
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M Shimizu T Yamada K Sasaki A Takada H Nomura F Iguchi H Yugami 《Science and Technology of Advanced Materials》2015,16(2)
Controlling the thermal radiation spectra of materials is one of the promising ways to advance energy system efficiency. It is well known that the thermal radiation spectrum can be controlled through the introduction of periodic surface microstructures. Herein, a method for the large-area fabrication of periodic microstructures based on multi-step wet etching is described. The method consists of three main steps, i.e., resist mask fabrication via photolithography, electrochemical wet etching, and side wall protection. Using this method, high-aspect micro-holes (0.82 aspect ratio) arrayed with hexagonal symmetry were fabricated on a stainless steel substrate. The conventional wet etching process method typically provides an aspect ratio of 0.3. The optical absorption peak attributed to the fabricated micro-hole array appeared at 0.8 μm, and the peak absorbance exceeded 0.8 for the micro-holes with a 0.82 aspect ratio. While argon plasma etching in a vacuum chamber was used in the present study for the formation of the protective layer, atmospheric plasma etching should be possible and will expand the applicability of this new method for the large-area fabrication of high-aspect materials. 相似文献
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锆钛酸铅(PZT)厚膜的制备技术是制作基于PZT厚膜的微传感器和微驱动器的关键技术之一.传统的制备方法难以兼顾厚膜制备中对厚度、性能、工艺复杂度以及成本等方面的要求,因此,提出了一种新的利用气雾化湿法减薄体材料制备PZT厚膜的技术.该技术结合传统的PZT湿法化学刻蚀方法和刻蚀雾滴的物理轰击效应,在反应中实时去除化学反应残留物,在减薄前后样品厚度均匀性几乎不变的情况下,平均刻蚀速率可达3.3μm/min,且工艺过程简单,成本低廉.实验结果表明,用该技术制备的PZT厚膜可满足微机电系统(MEMS)领域中微传感器和微致动器对于厚膜具备较高灵敏度和较大驱动能力的性能要求, 相似文献
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Qiaoyue Zhang Shun-Xing Liang Zhe Jia Wenchang Zhang Weimin Wang Lai-Chang Zhang 《材料科学技术学报》2021,61(2):159-168
Although an increasing interest has been attracted to further develop heterostructured catalysts from metallic glasses(MGs) by heat treatment, overcoming surface oxidation effect is still a critical problem for such environmental catalysts. Herein, a short-time electrochemical etching of partially crystallized Febased ribbons in 0.3 M H3 PO4 electrolyte enables the formation of honeycomb-like nanoporous structure as effective catalytic active sites in Fenton-like process. Studies of structure and surface morphologies reveal that the formation of nanoporous structure by potentiostatic etching originates from electrochemical potential difference of nanocrystals(a-Fe(Si) and Fe2 B) and residual amorphous phase in partially crystallized ribbons, where Fe2 B having a lower open circuit potential tends to be selectively dissolved.Simultaneously, thin oxide layer after electrochemical etching exposes more active sites for H2 O2 activation and provides an effective protection of nanocrystals from massive loss during etching. Investigation of optimal processing conditions suggests that the selection of electrolyte plays an important role;dye degradation rates of etched ribbons in HNO3 and Na2 SO4 electrolytes can also achieve at least 2 times higher than that of as-annealed ribbons. This work holds the promise to develop novel environmental catalysts by effective electrochemical etching of partially crystallized ribbons. 相似文献
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We report fabrication and use of a flexible array of nano-apertures for photolithography on curved surfaces. The batch-fabricated apertures are formed of metal-coated silicone tips. The apertures are formed at the end of the silicone tips by either electrochemical etching of the metal or plasma etching of a protective mask followed by wet chemical etching. The apertures are as small as 250 nm on substrates larger than several millimeters. We demonstrate how the nano-aperture array can be used for nano-fabrication on flat and curved substrates, and show the subsequent fabrication steps to form large arrays of sub-micron aluminum dots or vertical silicon wires. 相似文献
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AbstractControlling the thermal radiation spectra of materials is one of the promising ways to advance energy system efficiency. It is well known that the thermal radiation spectrum can be controlled through the introduction of periodic surface microstructures. Herein, a method for the large-area fabrication of periodic microstructures based on multi-step wet etching is described. The method consists of three main steps, i.e., resist mask fabrication via photolithography, electrochemical wet etching, and side wall protection. Using this method, high-aspect micro-holes (0.82 aspect ratio) arrayed with hexagonal symmetry were fabricated on a stainless steel substrate. The conventional wet etching process method typically provides an aspect ratio of 0.3. The optical absorption peak attributed to the fabricated micro-hole array appeared at 0.8 μm, and the peak absorbance exceeded 0.8 for the micro-holes with a 0.82 aspect ratio. While argon plasma etching in a vacuum chamber was used in the present study for the formation of the protective layer, atmospheric plasma etching should be possible and will expand the applicability of this new method for the large-area fabrication of high-aspect materials. 相似文献
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Hong-Seok Seo Han-Don Um Jae-Hyun Kim Yong Woo Cho Jung-Ho Lee 《Materials Letters》2009,63(29):2567-2569
There is an exponentially growing need for well-oriented, vertical silicon nano/micro-structure arrays, particularly in high-density integrated electronic devices. Here, we demonstrate that precisely controlled vertical arrays of silicon wires and cones can be fabricated by a combined treatment strategy of electrochemical and chemical etchings. First, a periodically ordered array of silicon wires was readily fabricated at microscale by simple electrochemical etching in which the current density played a critical role in determining the wire diameter and interspacing. The microstructures fabricated by electrochemical etching were more precisely tuned by further chemical etching, thereby transforming into cone arrays with extremely sharp tips where the cone height was controlled by the etching time. This approach could have broad utility in many electronics requiring miniaturization and high-density integration such as field emitters, photovoltaic and thermoelectric devices. 相似文献