• Title/Summary/Keyword: ultrasonic horn

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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
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    • v.29 no.11
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    • pp.1256-1263
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    • 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.

  • https://doi.org/10.7736/KSPE.2012.29.11.1256 인용 PDF KSCI

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
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    • v.21 no.2
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    • pp.119-125
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    • 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.

  • https://doi.org/10.5228/KSTP.2012.21.2.119 인용 PDF KSCI