Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Replication of Hybrid Micropatterns Using Selective Ultrasonic Imprinting

선택적 초음파 임프린팅을 사용한 복합 미세패턴의 복제기술

  • Lee, Hyun Joong (Dept. of Mechanical System Design Engineering, Seoul Nat'l Univ. of Science and Technology) ;
  • Jung, Woosin (Dept. of Mechanical System Design Engineering, Seoul Nat'l Univ. of Science and Technology) ;
  • Park, Keun (Dept. of Mechanical System Design Engineering, Seoul Nat'l Univ. of Science and Technology)
  • 이현중 (서울과학기술대학교 기계시스템디자인공학과) ;
  • 정우신 (서울과학기술대학교 기계시스템디자인공학과) ;
  • 박근 (서울과학기술대학교 기계시스템디자인공학과)
  • Received : 2014.08.31
  • Accepted : 2014.10.13
  • Published : 2015.01.01
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Abstract

Ultrasonic imprinting is a micropattern replication technology for a thermoplastic polymer surface that uses ultrasonic vibration energy; it has the advantages of a short cycle time and low energy consumption. Recently, ultrasonic imprinting has been further developed to extend its functionality: (i) selective ultrasonic imprinting using mask films and (ii) repetitive ultrasonic imprinting for composite pattern development. In this study, selective ultrasonic imprinting was combined with repetitive imprinting in order to replicate versatile micropatterns. For this purpose, a repetitive imprinting technology was further extended to utilize mask films, which enabled versatile micropatterns to be replicated using a single mold with micro-prism patterns. The replicated hybrid micropatterns were optically evaluated through laser light images, which showed that versatile optical diffusion characteristics can be obtained from the hybrid micropatterns.

초음파 임프린팅은 초음파 진동에너지를 이용하여 열가소성 고분자 표면에 미세패턴을 복제할 수 있는 공정으로 짧은 성형시간에 적은 에너지로 미세패턴 복제가 가능한 장점이 있다. 최근에는 마스크 필름을 사용한 선택적 임프린팅 기술과 다중 패턴성형이 가능한 반복적 임프린팅 기술이 개발되었다. 본 연구에서는 선택적 초음파 임프린팅에 반복적 임프린팅을 접목시켜 다양한 형태의 다중 복합 미세패턴의 복제기술을 개발하였다. 이를 위해 미세 프리즘 패턴을 포함한 금형과 다양한 형태의 마스크 필름을 사용하여 선택적 연속성형 및 반복성형을 통해 다양한 형태의 미세패턴을 복제할 수 있는 임프린팅 기술을 개발하였다. 또한 복제된 미세패턴 영역에 대해 레이저 조사실험을 실시하여 다양한 형태의 광확산 특성을 갖는 필름을 개발할 수 있음을 확인하였다.

Keywords

References

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