Fabrication of Ceramic Line Pattern by UV-Nanoimprint Lithography of Inorganic Polymers

무기고분자의 나노임프린트법에 의한 세라믹 선형 패턴의 제조

  • Park Jun-Hong (Department of Fine Chemical Engineering, Chungnam National University) ;
  • Pham Tuan-Anh (Department of Fine Chemical Engineering, Chungnam National University) ;
  • Lee Jae-Jong (Nano-Mechnical Systems Technology, Korea Institute of Machinery & Materials) ;
  • Kim Dong-Pyo (Department of Fine Chemical Engineering, Chungnam National University)
  • 박준홍 (충남대학교 공과대학 공업화학과) ;
  • 팜안뚜앙 (충남대학교 공과대학 공업화학과) ;
  • 이재종 (한국기계연구소 나노공정장비연구센터) ;
  • 김동표 (충남대학교 공과대학 공업화학과)
  • Published : 2006.09.01

Abstract

The SiC-based ceramic nanopatterns were prepared by placing polydimethylsiloxane (PDMS) mold from DVD master on the spincoated polyvinylsilaeane (PVS) or allylhydridopolycaybosilane (AHPCS) as ceramic precursors to fabricate line pattern via UV-nanoimprint lithography (UV-NIL), and subsequent pyrolysis at $800^{\circ}C$ in nitrogen atmosphere. As the dimensional change of polymeric and ceramic patterns was comparatively investigated by AFM and SEM, the shrinkage in height was 38.5% for PVS derived pattern and 24.1% for AHPCS derived pattern while the shrinkage in width was 18.8% for PVS and 16.7% for AHPCS. It indicates that higher ceramic yield of the ceramic precursor resulted in less shrinkage, and the strong adhesion between the substrate and the pattern caused anisotropic shrinkage. This preliminary work suggests that NIL is a promissing route for fabricating ceramic MEMS devices, with the development on the shrinkage control.

액상의 고분자 전구체 polyvinylsilazane (PVS) 혹은 allylhydridopolycarbosilane(AHPCS)를 실리콘 기판 위에 스핀 코팅한 다음, DVD 마스터로부터 제조된 polydimethylsiloxane(PDMS) 몰드를 이용한 자외선 나노임프린트법으로 나노 크기의 고분자 패턴을 제조하였다. 나아가 질소 분위기하에서 $800^{\circ}C$ 열처리함으로써 각각 SiCN, SiC 세라믹 패턴도 제조하였다. 가교된 고분자와 세라믹 패턴의 폭과 넓이를 원자힘현미경(AFM)과 주사전자현미경(SEM)으로 관측한 결과 PVS와 AHPCS의 패턴 높이는 각각 38.5%와 24.1%, 패턴 폭은 18.8%와 16.7%의 수축률을 나타내었다. 즉 전구체의 세라믹 수율이 높을수록 세라믹 패턴 수축률은 낮아졌고, 패턴과 기판과의 접착에 의한 수축억제로 이방성 수축현상도 관찰되었다. 본 연구결과는 새로운 세라믹 MEMS 소자제작공정으로서 나노임프린트법의 가능성과 수축률 제어 연구가 필요함을 제시하고 있다.

Keywords

References

  1. M. Mehrcgancy, C. A. Zorman, N. Rajan, and C. H. Wu, IEEE, 86, 1594 (1998) https://doi.org/10.1109/5.704265
  2. P. Baldus, M. Jansen, and D. Spoorn, Science, 285, 699 (1999) https://doi.org/10.1126/science.285.5428.699
  3. C. K. Fredrickson and Z. H. Fan, Lab on a Chip, 4, 526 (2004) https://doi.org/10.1039/b410720a
  4. A. Y. Fu, C. Spence, A. Scherer, F. H. Arnold, and S. R. Quake, Nat. Biotechnol., 17, 1109 (1999) https://doi.org/10.1038/15095
  5. H. Yang, P. Deschatelets, S. T. Brittain, and G. M. Whitesides, Adv. Mat., 13, 54 (2001) https://doi.org/10.1002/1521-4095(200101)13:1<54::AID-ADMA54>3.0.CO;2-Y
  6. S. Roy, C. A. Zorman, M. Mehregany, and R. DeAnna, ANASYS Solutions, 1, 22 (1999)
  7. Y. Dong, C. Zorman, and P. Molian, J. Micromech. Microeng., 13, 680 (2003) https://doi.org/10.1088/0960-1317/13/5/320
  8. D. Gao, M. J. Wijesundara, C. Carraro, R. T. Howe, and R. Maboudian, IEEE, 4, 441 (2004)
  9. L. Liew, Y. Liu, R. Luo, T. Cross, L. An, V. M. Bright, M. L. Dunn, J. W. Daily, and R. Raj, Sensor. Actuat. A, 95, 120 (2002) https://doi.org/10.1016/S0924-4247(01)00723-3
  10. M. D. Levenson, Solid State Technol., 33, 6 (1996)
  11. T. H. P. Chang, M. G. R. Thomson, M. L. Yu, E. Kratschmer, H. S. Kim, K. Y. Lee, S. A. Rishton, and S. Zolgharnain, Microelectron. Eng., 32, 113 (1996) https://doi.org/10.1016/0167-9317(95)00366-5
  12. M. Cavallini, M. Murgia, and F. Biscarini, Mater. Sci. & Eng. C, 19, 275 (2002) https://doi.org/10.1016/S0928-4931(01)00398-8
  13. I. Haisma, M. Verheijen, K. Heuvel, and J. Vac, Sci. Technol. B, 14, 4124 (1996) https://doi.org/10.1116/1.588604
  14. I. K. Sung, Christian, M. Mitchell, D. P. Kim, and Paul J. A. Kenis, Adv. Funct. Mater., 15, 1336 (2005) https://doi.org/10.1002/adfm.200500038
  15. L. H. Nguyen, M. Straub, and M. Gu, Adv. Funct. Mater., 15, 209 (2005) https://doi.org/10.1002/adfm.200400212
  16. A. Kumar, H. A. Biebuyck. and G. M. Whitesides, Langmuir, 10, 1498 (1994) https://doi.org/10.1021/la00017a030
  17. E. Kim, Y. Xia, and G. M. Whitesides, Nature, 376, 581 (1995) https://doi.org/10.1038/376581a0
  18. X. M. Zhao, Y. Xia, and G. M. Whitesides, Adv. Mater., 8, 837 (1996) https://doi.org/10.1002/adma.19960081016
  19. K. Y. Suh, Y. S. Kim, and H. H. Lee, Adv. Mater., 13, 1386 (2001) https://doi.org/10.1002/1521-4095(200109)13:18<1386::AID-ADMA1386>3.0.CO;2-X