Heat conduction and polymer flow in spot/scanning laser-assisted imprinting

Laser-assisted thermal imprinting (LATI) is a promising high-throughput direct replication method for micro- or nanostructured films. In LATI, only the surface of the mold is heated by laser irradiation and the surface of the polymer is heated by heat transfer; subsequently, the polymer surface lowe...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Keisuke NAGATO, Nana TAKAHASHI, Yuki YAJIMA, Eisuke SHIMIZU, Masayuki NAKAO
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2019
Materias:	laser assistance nanoimprinting heat conduction pressure distribution polymer flow Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/206d7bfa60394b7d9f42628e182980d2
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:206d7bfa60394b7d9f42628e182980d2
record_format	dspace
spelling	oai:doaj.org-article:206d7bfa60394b7d9f42628e182980d22021-11-29T05:43:34ZHeat conduction and polymer flow in spot/scanning laser-assisted imprinting2187-974510.1299/mej.18-00553https://doaj.org/article/206d7bfa60394b7d9f42628e182980d22019-05-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/6/3/6_18-00553/_pdf/-char/enhttps://doaj.org/toc/2187-9745Laser-assisted thermal imprinting (LATI) is a promising high-throughput direct replication method for micro- or nanostructured films. In LATI, only the surface of the mold is heated by laser irradiation and the surface of the polymer is heated by heat transfer; subsequently, the polymer surface lowers its viscosity and fills into the micro- or nanostructures of the mold. After the laser irradiation, the imprinted polymer surface is cooled by heat conduction to the inside of the film and mold immediately after the micro- or nanostructures are replicated. Therefore, not only a short cycle time but also low energy consumption in the imprinting process can be realized. However, the mechanism of heat conduction and polymer flow in the microstructured mold in LATI has not been clarified. In this study, we performed model experiments and simulations of heat conduction to determine the approximate time schedule of heat conduction in the polymer and the flow of the polymer. In the model experiments, we found that the replication speed of scanning irradiation was much higher than that of spot irradiation in spite of the same power density. It was found that the partial contact was decreased in scanning irradiation and the polymer flow easily occurred. This is because the surface profiles were different depending on the filling method. In spot irradiation, the surface exhibited a concave shape owing to the surface tension between the polymer and mold surface; meanwhile, in scanning irradiation, the surface exhibited a convex shape owing to pushing pressure.Keisuke NAGATONana TAKAHASHIYuki YAJIMAEisuke SHIMIZUMasayuki NAKAOThe Japan Society of Mechanical Engineersarticlelaser assistancenanoimprintingheat conductionpressure distributionpolymer flowMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 6, Iss 3, Pp 18-00553-18-00553 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	laser assistance nanoimprinting heat conduction pressure distribution polymer flow Mechanical engineering and machinery TJ1-1570
spellingShingle	laser assistance nanoimprinting heat conduction pressure distribution polymer flow Mechanical engineering and machinery TJ1-1570 Keisuke NAGATO Nana TAKAHASHI Yuki YAJIMA Eisuke SHIMIZU Masayuki NAKAO Heat conduction and polymer flow in spot/scanning laser-assisted imprinting
description	Laser-assisted thermal imprinting (LATI) is a promising high-throughput direct replication method for micro- or nanostructured films. In LATI, only the surface of the mold is heated by laser irradiation and the surface of the polymer is heated by heat transfer; subsequently, the polymer surface lowers its viscosity and fills into the micro- or nanostructures of the mold. After the laser irradiation, the imprinted polymer surface is cooled by heat conduction to the inside of the film and mold immediately after the micro- or nanostructures are replicated. Therefore, not only a short cycle time but also low energy consumption in the imprinting process can be realized. However, the mechanism of heat conduction and polymer flow in the microstructured mold in LATI has not been clarified. In this study, we performed model experiments and simulations of heat conduction to determine the approximate time schedule of heat conduction in the polymer and the flow of the polymer. In the model experiments, we found that the replication speed of scanning irradiation was much higher than that of spot irradiation in spite of the same power density. It was found that the partial contact was decreased in scanning irradiation and the polymer flow easily occurred. This is because the surface profiles were different depending on the filling method. In spot irradiation, the surface exhibited a concave shape owing to the surface tension between the polymer and mold surface; meanwhile, in scanning irradiation, the surface exhibited a convex shape owing to pushing pressure.
format	article
author	Keisuke NAGATO Nana TAKAHASHI Yuki YAJIMA Eisuke SHIMIZU Masayuki NAKAO
author_facet	Keisuke NAGATO Nana TAKAHASHI Yuki YAJIMA Eisuke SHIMIZU Masayuki NAKAO
author_sort	Keisuke NAGATO
title	Heat conduction and polymer flow in spot/scanning laser-assisted imprinting
title_short	Heat conduction and polymer flow in spot/scanning laser-assisted imprinting
title_full	Heat conduction and polymer flow in spot/scanning laser-assisted imprinting
title_fullStr	Heat conduction and polymer flow in spot/scanning laser-assisted imprinting
title_full_unstemmed	Heat conduction and polymer flow in spot/scanning laser-assisted imprinting
title_sort	heat conduction and polymer flow in spot/scanning laser-assisted imprinting
publisher	The Japan Society of Mechanical Engineers
publishDate	2019
url	https://doaj.org/article/206d7bfa60394b7d9f42628e182980d2
work_keys_str_mv	AT keisukenagato heatconductionandpolymerflowinspotscanninglaserassistedimprinting AT nanatakahashi heatconductionandpolymerflowinspotscanninglaserassistedimprinting AT yukiyajima heatconductionandpolymerflowinspotscanninglaserassistedimprinting AT eisukeshimizu heatconductionandpolymerflowinspotscanninglaserassistedimprinting AT masayukinakao heatconductionandpolymerflowinspotscanninglaserassistedimprinting
_version_	1718407633331814400

Heat conduction and polymer flow in spot/scanning laser-assisted imprinting

Ejemplares similares