TY - JOUR
T1 - Fabrication of seamless roller mold with 3D micropatterns using inner curved surface photolithography
AU - Tsai, Sung Wen
AU - Chen, Po Yu
AU - Huang, Shr Ren
AU - Lee, Yung Chun
N1 - Funding Information:
This study was supported by the National Science Council (NSC) of Taiwan under Project No. MOST 104-2119-M-006-011 and MOST 104-3113-E-006-002 .
Publisher Copyright:
© 2015 Published by Elsevier B.V.
PY - 2016/1/25
Y1 - 2016/1/25
N2 - Continuous roller imprinting is one of the most promising means of fabricating micro/nano structures over a large area. However, the fabrication of roller molds with seamless and three-dimensional (3D) complex patterns poses a significant challenge. Accordingly, this paper presents an innovative approach for fabricating a seamless hollow roller master mold patterned with discrete or continuous 3D structures. The major steps in the proposed fabrication method include an inner pneumatic rotary photoresist (PR) coating process followed by a step-and-rotate lithography process or a continuous rotation lithography process. Having fabricated the master mold, the microstructure patterns are transferred to a roller by means of a polydimethyl-siloxane (PDMS) casting technique. The effectiveness of the proposed method is demonstrated by patterning a PDMS-casted roller mold with wavy microstructures and then using the roller mold to fabricate a diffusion optical film. The experimental results show that the diffusion film has a haze of 97.1% and a total transmittance of 91.6%.
AB - Continuous roller imprinting is one of the most promising means of fabricating micro/nano structures over a large area. However, the fabrication of roller molds with seamless and three-dimensional (3D) complex patterns poses a significant challenge. Accordingly, this paper presents an innovative approach for fabricating a seamless hollow roller master mold patterned with discrete or continuous 3D structures. The major steps in the proposed fabrication method include an inner pneumatic rotary photoresist (PR) coating process followed by a step-and-rotate lithography process or a continuous rotation lithography process. Having fabricated the master mold, the microstructure patterns are transferred to a roller by means of a polydimethyl-siloxane (PDMS) casting technique. The effectiveness of the proposed method is demonstrated by patterning a PDMS-casted roller mold with wavy microstructures and then using the roller mold to fabricate a diffusion optical film. The experimental results show that the diffusion film has a haze of 97.1% and a total transmittance of 91.6%.
UR - http://www.scopus.com/inward/record.url?scp=84945550893&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84945550893&partnerID=8YFLogxK
U2 - 10.1016/j.mee.2015.10.008
DO - 10.1016/j.mee.2015.10.008
M3 - Article
AN - SCOPUS:84945550893
SN - 0167-9317
VL - 150
SP - 19
EP - 25
JO - Microelectronic Engineering
JF - Microelectronic Engineering
ER -