Skip to main content

8 Result(s)

within Yong-Won Ma Remove this filter

and

  1. Article

    Open Access

    Fabrication System for Large-Area Seamless Nanopatterned Cylinder Mold Using the Spiral Laser Interference Exposure Method

    With the advancement in the field of nanotechnology, nanopatterning finds extensive application not only in high value-added products but also in inexpensive products. In addition, the technology required for ...

    Yong-Won Ma, Jun Han Park, Sung Jae Lee… in International Journal of Precision Enginee… (2023)

    Download PDF (1215 KB) View Article

  2. No Access

    Article

    3D porous metal structure manufacturing using UV pulsed laser and copper formate solution

    This paper demonstrates a simple fabrication method of porous metal structures using liquid phase solution (copper formate solution) based on UV pulse laser deposition. This process can produce arbitrary metal...

    Boseok Kang, Sungmoo Hong, Chanju Yoo, Dongbin You, Yong-Won Ma… in Applied Physics A (2018)

  3. No Access

    Article

    A method for fabricating a micro-structured surface of polyimide with open and closed pores

    A new approach for fabricating open and closed porous structures based on laser processing is presented. Liquid polyimide (PI) was mixed with azodicarbonamide which is a chemical blowing agent (CBA), and the m...

    Yong-Won Ma, Jae Yong Oh, Seokyoung Ahn… in Journal of the Korean Physical Society (2016)

  4. Article

    Open Access

    Fabrication of polyimide spheres using a pulsed laser at 355 nm

    A new approach for manufacturing hollow polyimide (PI) microspheres is presented. The method is based on cavitation bubbles and small CO2 gas bubble which can generate uniform microspheres. When liquid PI was irr...

    Yong-Won Ma, Moon-Suk Kang, Chan Park, Sung-Moo Hong, Sang-Mae Lee… in Applied Physics A (2016)

    Download PDF (1124 KB) View Article

  5. No Access

    Article

    Fabrication of a high-density nano-porous structure on polyimide by using ultraviolet laser irradiation

    A new approach for fabricating a high-density nano-porous structure on polyimide (PI) by using a 355-nm UV laser is presented here. When PI was irradiated by using a laser, debris that had electrical conductiv...

    Yong-Won Ma, Myung Yung Jeong, Sang-Mae Lee… in Journal of the Korean Physical Society (2016)

  6. No Access

    Article

    Micronanofabrication for optofluidic sensors

    This paper reviews optical waveguide Bragg grating sensors integrated with a microfluidic chip. Optical Bragg gratings are inscribed in optical fibers and optical planar waveguides comprised of core and claddi...

    Sang-Mae Lee, Yong-Won Ma in Journal of the Korean Physical Society (2015)

  7. No Access

    Article

    A study on micro/nano pattern replication using a hydroxyethyl cellulose polymer

    A micro/nano pattern was simply fabricated on the surface of a hydroxyethyl cellulose (HEC) thin film and its properties were investigated. HEC is easily dissolved in water and has excellent properties such as...

    Sungmoo Hong, Bosik Kang, Seokyoung Ahn… in Journal of the Korean Physical Society (2015)

  8. No Access

    Article

    Experimental study on micro-porous patterning using UV pulse laser hybrid process with chemical foaming agent

    A new micro porous patterning method was proposed in this paper. We experimentally demonstrated the feasibility of this method using UV laser hybrid process with polymer sheet. The PP(Polypropylene) sheet of 0...

    Chan Park, Bo-Sung Shin, Moon-Suk Kang… in International Journal of Precision Enginee… (2015)