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2019
Two step lithography와 나노 실리카 코팅을 이용한 초발수 필름 제작
Fabrication of Superhydrophobic Surfaces with Uniform Structures
한국센서학회
이동원 외 1명
논문정보
- Publisher
- 센서학회지
- Issue Date
- 2019-07-31
- Keywords
- -
- Citation
- -
- Source
- -
- Journal Title
- -
- Volume
- 28
- Number
- 4
- Start Page
- 251
- End Page
- 255
- DOI
- ISSN
- 12255475
Abstract
We propose a two-step lithography process to minimize edge-bead issues caused by thick photoresist (PR) coating. In the con- ventional PR process, the edge bead can be efficiently removed by applying an edge-bead removal (EBR) process while rotating thesilicon wafer at a high speed. However, applying conventional EBR to the production of desired PR mold with unique negative patternscannot be used because a lower rpm of spin coating and a lower temperature in the soft bake process are required. To overcome this problem, a two-step lithography process was developed in this study and applied to the fabrication of a polydimethylsiloxane (PDMS)film having super-hydrophobic characteristics. Following UV exposure with a first photomask, the exposed part of the silicon wafer wasselectively removed by applying a PR developer while rotating at a low rpm. Then, unique PR mold structures were prepared by employing an additional under-exposure process with a second mask, and the mold patterns were transferred to the PDMS. Resultsshowed that the fabricated PDMS film based on the two-step lithography process reduced the height difference from 23% to 5%. Inaddition, the water contact angle was greatly improved by spraying of hydrophobic nanosilica on the dual-scaled PDMS surface.
- 전남대학교
- KCI
- 센서학회지
저자 정보
| 이름 | 소속 |
|---|---|
| 이동원 | 기계공학부 |