Fabrication of Self-standing Polystyrene Thin Films with Fine Through Holes by use of Water Soluble Resin Sacrificial Layer

A simple fabrication process is developed for self-standing resin films with well-defined through-holes by use of imprint technology. Polyvinyl alcohol film, which can be dissolved in water, is used as a sacrificial film. A commercial bi-layer film sheet, where polyvinyl alcohol (PVA) film is lamina...

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Bibliographic Details
Published inJournal of Photopolymer Science and Technology Vol. 32; no. 1; pp. 137 - 141
Main Authors Kawata, Hiroaki, Uchida, Keito, Yasuda, Masaaki, Hirai, Yoshihiko
Format Journal Article
LanguageEnglish
Published Hiratsuka The Society of Photopolymer Science and Technology(SPST) 24.06.2019
Japan Science and Technology Agency
Subjects
Casting
Chemical industry
Polyethylene terephthalate
Polystyrene
Polystyrene resins
Polyvinyl alcohol
Polyvinyl alcohol film
Self-standing
Thin films
Through hole
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Summary:A simple fabrication process is developed for self-standing resin films with well-defined through-holes by use of imprint technology. Polyvinyl alcohol film, which can be dissolved in water, is used as a sacrificial film. A commercial bi-layer film sheet, where polyvinyl alcohol (PVA) film is laminated on polyethylene terephthalate (PET) film, is used. A mold pattern is directly transferred to the PVA film in the bi-layer film sheet, and polystyrene (PS) resin is coated on the patterned PVA film. The PVA sacrificial film is removed in water. A defect free PS self-standing film of 0.7 μm in thickness can be obtained in the fixing frame with 5 mm diameter hollow. Through-holes of 2.5 μm square are successfully fabricated in the PS self-standing film.
ISSN:0914-9244
1349-6336
DOI:10.2494/photopolymer.32.137