• Title, Summary, Keyword: micro-patterning

Search Result 237, Processing Time 0.037 seconds

Replication Characteristics of Micro-Patterns according to the Vibration Transmission Direction in the Ultrasonic Imprinting Process (초음파 성형시 진동전달 방향에 따른 미세패턴의 전사특성 고찰)

  • Seo, Young-Soo;Lee, Ki-Yeon;Cho, Young-Hak;Park, Keun
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.29 no.11
    • /
    • pp.1256-1263
    • /
    • 2012
  • The present study covers the ultrasonic patterning process to replicate micro-patterns on a polymer substrate. The ultrasonic patterning process uses ultrasonic waves to generate frictional heat between an ultrasonic horn and the polymer substrate, from which the surface region of the polymer substrate is softened sufficiently for the replication of micro-patterns. The ultrasonic patterning process can divided into two categories according to the direction of vibration transmission: direct patterning and indirect patterning. The direct patterning uses a patterned horn, and the ultrasonic vibration is transferred directly from the patterned horn to the substrate. On the contrary, the indirect patterning process uses a plain horn, and the micro-patterns are engraved on a mold that is located below the substrate. Thus, the micro-patterns are replicated as an indirect manner. In this study, these direct and indirect patterning processes are compared in terms of the replication characteristics. Additionally, the possibility of double-side patterning is also discussed in comparison with the conventional single-side patterning process.

A Study on Micro-patterning used the UV-Curable Resin (UV경화성 수지를 이용한 미세패턴 형성에 관한 연구)

  • 남수용
    • Journal of the Korean Printing Society
    • /
    • v.19 no.2
    • /
    • pp.68-78
    • /
    • 2001
  • UV-curable resin has the properties of quick-drying, thigh productivity at low temperature, energy savint, space saving, solventless, non-polluting and low-stinking, and thus, UV-curing system has been widely used in the fields of printing inks, adhesives, paints and coating agents. This study has been executed to micro-patterning used UV-curable resin, The micro-patterning properties of this photoresist were investigated under irradiation of UV light low pressure mercury lamp. When the exposed photoresist film was developed by pure water developer, the resolution of this photoresist was about 50$\mu\textrm{m}$.

  • PDF

Effect of Material Flow Direction on the Replication Characteristics of the Ultrasonic Patterning Process (초음파 패턴성형시 유동방향 구속에 따른 미세패턴의 성형특성 고찰)

  • Seo, Y.S.;Lee, K.Y.;Park, K.
    • Transactions of Materials Processing
    • /
    • v.21 no.2
    • /
    • pp.119-125
    • /
    • 2012
  • The present study addresses a direct patterning process on a plastic film using ultrasonic vibration energy. In this process, a tool horn containing micro-patterns is attached to an ultrasonic power supply, and is used with ultrasonic vibration to replicate micro-patterns on the surface of a plastic film. To improve the replication characteristics of the micro-patterns, the effect of the die shape of the ultrasonic patterning process was investigated with respect to the flow direction control. Finite element analyses were performed to predict the flow characteristics of the polymer with variations in die design parameters. Experiments were conducted using the optimally-designed die, from which it was possible to attain much improved pattern replication.

Micro Patterning Using Near-Field Coupled Nano Probe Laser Photo Patterning Of Chloromethylated Polyimide Thin Film (클로로메틸 폴리이미드(CMPI) 박막과 근접장 나노 프로브 레이저 패터닝을 이용한 미세 형상 가공 기술)

  • 최무진;장원석;김재구;조성학;황경현
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • /
    • pp.369-372
    • /
    • 2004
  • Photo-induced surface alignment is charming as a non-contact photo-patternable alignment technology which can be used in the next generation of displays, such as large area, multi-domain. For decades, many polymer film have been investigated and developed to be used in the photo alignment. Among these photoreactive materials, recently developed polyimide, Chloromethylated Polyimide(CMPI) now became the focus of interests in this area because of its high photosensitivity and superior thermal stability. In this report, we present micro patterning method to form the nanoscale structure by Mask-Less laser patterning using this CMPI film and NSOM probe.

  • PDF

Micro Patterning of Conductive Line by Micro Droplet Ejection of Nano Metal Ink (나노 금속잉크의 미세 액적 토출을 이용한 마이크로 패터닝)

  • Seo S.H.;Park S.J.;Jung H.C.;Joung J.W.
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • /
    • pp.689-693
    • /
    • 2005
  • Inkjet printing is a non-contact and direct writing associated with a computer. In the industrial field, there have been many efforts to utilize the inkjet printing as a new way of manufacturing, especially for electronic devices. For the application of inkjet printing to electronic field, one of the key factors is exact realization of designed images into printed patterns. In this work, micro patterning for conducting line has been studied using the piezoelectric print head and silver nano ink. Dimensions of printed images have been predicted in terms of print resolution and diameter of a single dot. The predicted and the measured values showed consistent results. Using the results, the design capability for industrial inkjet printing could be achieved.

  • PDF

Micro-Contact Printing Method for Patterning Liquid Crystal Alignment Layers

  • Jung, Jong-Wook;Kim, Hak-Rim;Lee, You-Jin;Kim, Jae-Hoon
    • Journal of Information Display
    • /
    • v.7 no.2
    • /
    • pp.12-15
    • /
    • 2006
  • We propose a patterning method of liquid crystal (LC) alignment layer for producing multi-domain LC structures. By controlling thermal conditions during micro-contact printing procedures and facilitating wetting properties of patterning materials, patterned LC orientation can be easily obtained on a bare ITO surface or other polymer films. The newly proposed patterning method is expected to be a very useful tool for fabricating multi-domain LC structures to enhance or design electro-optic properties of LC-based devices.

Implementation of High Performance Micro Electrode Pattern Using High Viscosity Conductive Ink Patterning Technique (고점도 전도성 잉크 패터닝 기술을 이용한 고성능 미세전극 패턴 구현)

  • Ko, Jeong Beom;Kim, Hyung Chan;Dang, Hyun Woo;Yang, Young Jin;Choi, Kyung Hyun;Doh, Yang Hoi
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.31 no.1
    • /
    • pp.83-90
    • /
    • 2014
  • EHD (electro-hydro-dynamics) patterning was performed under atmospheric pressure at room temperature in a single step. The drop diameter smaller than nozzle diameter and applied high viscosity conductive ink in EHD patterning method provide a clear advantage over the piezo and thermal inkjet printing techniques. The micro electrode pattern was printed by continuous EHD patterning method using 3-type control parameters (input voltage, patterning speed, nozzle pressure). High viscosity (1000cps) conductive ink with 75wt% of silver nanoparticles was used. EHD cone type nozzle having an internal diameter of $50{\mu}m$ was used for experimentation. EHD jetting mode by input voltage and applied 1st order linear regression in stable jet mode was analyzed. The stable jet was achieved at the amplitude of 1.4~1.8 kV. $10{\mu}m$ micro electrode pattern was created at optimized parameters (input voltage 1.6kV, patterning speed 25mm/sec and nozzle pressure -2.3kPa).