• Title/Summary/Keyword: Nano-Replication

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Development of a Nano Replication Printing(nRP) Process using a Voxel Matrix Scanning Scheme (복셀 메트릭스 스캐닝법에 의한 나노 복화(複畵)공정 재발)

  • 박상후;임태우;양동열;이신욱;공홍진
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.2
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    • pp.210-217
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    • 2004
  • In this study, a new process, named as nano replication printing(nRP) process, is developed for printing any figure in the range of several micrometers by using voxel matrix scanning scheme. In this newly developed process, a femto-second laser is scanned on a photosensitive monomer resin in order to induce polymerization of the liquid resin according to a voxel matrix which is transformed from bitmap format file. After the polymerization, a droplet of ethanol is dropt to remove the unnecessary remaining liquid resin and then the polymerized figures with nano-scaled precision are only remaining on the glass plate. By the nRP process, any figure file of bitmap format could be reproduced as nano-scaled precision replication in the range of several micrometers. Also, nano/micro-scaled patterns for an extremely wide range of applications would become a technologically feasible reality. Some of figures with nano-scaled precision were printed in scaled replication as examples to prove the usefulness of this study.

A study on the micro pattern replication difference in injection molding (사출성형시 미세패턴 전사성 차이에 관한 연구)

  • Kim, Tae-Hoon;Yoo, Yeong-Eun;Je, Tae-Jin;Park, Yeong-Woo;Roh, Seung- Hwan;Choi, Doo-Sun
    • Design & Manufacturing
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    • v.2 no.4
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    • pp.48-53
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    • 2008
  • We injection molded a thin type of plate and wedge type of plate with micro prizm patterns on its surface and investigated the fidelity of replication of the micro pattern depending on the process parameter such as mold temperature, melt temperature, injection rate or packing pressure. The size of the $90^{\circ}$ prizm pattern is $50{\mu}m$ and the size of the plate is about $335mm{\times}213mm$ and $400mm{\times}400mm$. The thicknesses are 2.6mm and 0.7mm at each edge of the wedge type of plate and 1mm at each edge of the thin type of plate. The fidelity of the replication turned out quite different according to the process parameters and location of the patterns on the plate. We measured the cavity pressure and temperature in real-time during the molding to analyze the effect of the local melt pressure and temperature on the micro pattern replication.

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Study on Properties of Self-Assembled Monolayer as Anti-adhesion Layer on Metallic Nano Stamper (금속 나노 스탬퍼 점착방지막으로서의 자기조립 단분자막 특성 연구)

  • 최성우;강신일
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2003.10a
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    • pp.367-370
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    • 2003
  • In this study, application of SAM (self-assembled monolayer) to nano replication process as an anti-adhesion layer was presented to reduce the surface energy between the nano mold and the replicated polymeric nano patterns. The electron beam lithography was used for master nano patterns and the electorforming process was used to fabricate the nickel nano stamper. Alkanethiol SAM as an anti-adhesion layer was deposited on metallic nano stamper using solution deposition method. To analyze wettability and adhesion force of SAM, contact angle and LFM (Lateral Force Microscopy) were measured at the actual processing temperature and pressure for the case of nano compression molding and at the actual UV dose for the case of nano UV molding. It was found that the surface energy due to SAM deposition on the nickel nano stamper markedly decreased and the quality of SAM on the nickel stamper maintained under the actual molding environments.

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Replication of Polyethylene Nano-Microstructures Using Ultrasonic Forming (초음파성형을 이용한 폴리에틸렌 나노 마이크로 구조물의 복제)

  • Lee, Chi-Hoon;Yu, Hyun-Woo;Shin, Bo-Sung;Ko, Jong-Soo
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.33 no.11
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    • pp.1209-1216
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    • 2009
  • Nano-micro hierarchical structures that nanoprotrusions were formed on the network-type microstructures were fabricated using an ultrasonic vibration forming technology. A commercial ultrasonic welding system was used to apply ultrasonic vibration energy. To evaluate the formability of ultrasonic vibration forming, nickel nano-micro hierarchical mold was fabricated and polyethylene (PE) was used as the replication material. The optimal molding time was 3.5 sec for PE nano-micro hierarchical structures. The molding process was conducted at atmospheric pressure.

Manufacture of High-Aspect-Ratio Polymer Nano-Hair Arrays by UV Nano Embossing Process (UV 나노 엠보싱 공정을 이용한 고종횡비 고분자 나노 섬모 어레이 제작)

  • Kim Dong-Sung;Lee Hyun-Sup;Lee Jung-Hyun;Lee Kun-Hong;Kwon Tai-Hun
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.30 no.7 s.250
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    • pp.773-778
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    • 2006
  • High-aspect-ratio nano-hair or nano-pillar arrays have great potential in a variety of applications. In this study, we present a simple and cost-effective replication method of high-aspect-ratio polymer nano-hair arrays. Highly ordered nano-porous AAO (anodic aluminum oxide) template was utilized as a reusable nano-mold insert. The AAO nano-mold insert fabricated by the two-step anodization process in this study had close- packed straight nano-pores, which enabled us to replicate densely arranged nano-hairs. The diameter, depth and pore spacing of the nano-pores in the fabricated AAO nano-mold insert were about 200nm, $1{\mu}m$ and 450nm, respectively. For the replication of polymer nano-hair arrays, a UV nano embossing process was applied as a mass production method. The UV nano embossing machine was developed by our group for the purpose of replicating nano-structures by means of non-transparent nano-mold inserts. Densely arranged high-aspect-ratio nano-hair arrays have been successfully manufactured by means of the UV nano embossing process with the AAO nano-mold insert under the optimum processing condition.

A Study on the Fabrication of Nano Pattern using a Nickel Stamper Replicated from Anodic Aluminum Oxide (Anodic Aluminum Oxide 기반 니켈 스탬퍼를 이용한 나노패턴 성형에 관한 연구)

  • Kim, S.;Kim, J.S.;Hong, S.K.;Kim, H.J.;Yoon, K.H.;Kang, J.J.
    • Transactions of Materials Processing
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    • v.20 no.1
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    • pp.23-28
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    • 2011
  • For the fabrication of nano patterned products manufacturing a nano patterned mold is needed in advance. The nano patterned stamper was fabricated by electroforming the AAO master with nickel. The surface of nickel-plated stamper had nano-patterned holes with the diameter of 73 nm and the depth of 83 nm. Hot embossing was used for forming P3HT sheet and the process factors of hot embossing were closer as pressure, temperature and time. In the present paper hot embossing experiments were performed to find the main process conditions to affect the replication ratio of nano patterns on surface of P3HT sheet. As a result, main contributing factors for the replication ratio of hot embossed pattern could be sequentially enumerated as pressure, temperature and time.

Fabrication of Metallic Nano-filter Using UV-Imprinting Process (UV 임프린팅 공정을 이용한 금속막 필터제작)

  • Noh Cheol Yong;Lee Namseok;Lim Jiseok;Kim Seok-min;Kang Shinill
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2005.05a
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    • pp.237-240
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    • 2005
  • The demand of micro electrical mechanical system (MEMS) bio/chemical sensor is rapidly increasing. To prevent the contamination of sensing area, a filtration system is required in on-chip total analyzing MEMS bio/chemical sensor. A nano-filter was mainly applied in some application detecting submicron feature size bio/chemical products such as bacteria, fungi and so on. We suggested a simple nano-filter fabrication process based on replication process. The mother pattern was fabricated by holographic lithography and reactive ion etching process, and the replication process was carried out using polymer mold and UV-imprinting process. Finally the nano-filter is obtained after removing the replicated part of metal deposited replica. In this study, as a practical example of the suggested process, a nano-dot array was replicated to fabricate nano-filter fur bacteria sensor application.

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Relationship between Replication and Structure of Micro/Nano Molded Parts

  • Ito, Hiroshi;Kazama, Kunihiko;Kikutani, Takeshi
    • Proceedings of the Polymer Society of Korea Conference
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    • 2006.10a
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    • pp.368-368
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    • 2006
  • Micro-molded parts can be defined as parts with microgram weight, parts with micro-structured surface, and parts with micro-precision. In this study, various micro-scale molded parts for various polymers were produced by using a precision micro-molding machine. Molded parts with nano-structure surface were also produced to analyze the effect of molding conditions on replication of surface pattern and higher-order structure development of molded parts. Replication of molded parts was influenced by material properties, molding conditions and size of surface pattern. Higher-order structure of molded parts was investigated by using polarized microscope. Skin-shear-core regions inside the molded parts were observed and shear region affected to surface replication.

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Fabrication of Precise Patterns using a Laser Beam Expanding Technique in Nano-Replication Printing (nRP) Process (레이저 빔 단면확대를 이용한 나노 복화(複畵)공정의 패턴 정밀도 향상에 관한 연구)

  • Park Sang Hu;Lim Tae Woo;Yang Dong-Yol;Yi Shin Wook;Kong Hong Jin
    • Journal of the Korean Society for Precision Engineering
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    • v.22 no.1
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    • pp.175-182
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    • 2005
  • A laser beam expanding technique is employed to fabricate precise nano-patterns in a nano-replication printing (nRP) process. In the nRP process, some patterns can be fabricated in the range of several microns inside on a polymerizable resin by using a volume-pixel (voxel) matrix that is transformed from a two-tone bitmap figure file. The liquid monomers are polymerized by means of a two-photon-absorption (TPA) phenomenon that is induced by a femtosecond (fs)-pulse laser. The yokels are generated consecutively to merge into adjoining yokels in the process of fabricating a pattern. The resolution of a fabricated pattern can be obtained under the diffraction limit of a laser beam by the two-photon absorbed polymerization (TPP). In this work, a beam-expanding technique has been applied to enlarge a working area and to fabricate precise patterns. Through this work, a working area is expanded by the technique as much as 2.5 times compared with a case of without a beam expanding technique, and precision of outside patterns is improved.