Influence of tensile strain and stress recovery on the ripple topography of gold thin coatings deposited on Polydimethylsiloxane
| Autor: | Wen-Hua Yang, 楊文華 |
|---|---|
| Rok vydání: | 2005 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 93 A novel manufacturing process to make a ripple structure with large area on the Polydimethylsiloxane (PDMS) film has been developed. A PDMS film with constrain tensile strain and deposited with gold film on surface by sputtering, and then released the tensile strain, the ripple structure was formed on surface of the film. During the history of the ripple structure was formed, the dislocation-like, crack and oriented surface crack easily happed in the ripple structure. The study also probed into the effect of tensile strain, thickness of gold film and strain release on wavelength and amplitude of the ripple structure of the PDMS film. The wavelength of ripple structure decreases with increasing tensile strain (30%, 50%, 70%, 90%, 110%) as well as strain released, and increases with increasing thickness of gold film. In addition, this study has been manufactured micro base-relief channels on surface of the PDMS film. Then the film with a forced elongation in bi-axial direction was fixed by mechanical locking, and was deposited with gold film on it. After tensile strain released ripple structure was formed on edge of micro-channel. Besides, we make a wrinkle structure with irregular wave on PDMS film when the film with a forced elongation in bi-axial direction lays on a Poly(Methyl Methacrylate) (PMMA) sheet. Because of the fact that friction resistant in the interface between PDMS film and PMMA sheet. we also make a nickel stamp with wrinkle structure by using electroforming. Finally the polymeric (SU-8 resist) wrinkle structure has been successfully replicated with the stamp by imprinting. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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