Focused-Infrared-Light Assisted Roll-to-Roll Hot Embossing

다국어 초록 (Multilingual Abstract)

Hot embossing techniques are used to engrave patterns on plastic substrates. Roll based hot embossing uses a heated roll for a continuous process. A heated roll with relief patterns is impressed on a preheated plastic substrate. Then, the substrate is cooled down quickly to prevent thermal shrinkage. The roll speed is normally very slow to ensure substrate temperature increase up to the glass transition temperature. In this paper, we propose a noncontact preheating technique using focused infrared light. The infrared light is focused as a line beam on a plastic substrate using an elliptical mirror just before entering the hot embossing roll. The mid range infrared light efficiently raises the substrate temperature. For preliminary tests, substrate deformation and temperature changes were monitored according to substrate speed. The experiments show that the proposed technique is a good possibility for high speed hot embossing.

참고문헌 (Reference)

1 Jeong, H., "Roll-to-Flat Texturing System with Infrared Preheating for Manufacturing a Microfluidic Device" 107 : 10-16, 2013

2 Xie, D., "Rapid Fabrication of Thermoplastic Polymer Refractive Microlens Array Using Contactless Hot Embossing Technology" 23 (23): 5154-5166, 2015

3 Yeo, L. P., "Micro-Fabrication of Polymeric Devices Using Hot Roller Embossing" 86 (86): 933-936, 2009

4 Peng, L., "Micro Hot Embossing of Thermoplastic Polymers : A Review" 24 (24): 2013

5 Focke, M., "Lab-on-a-Foil : Microfluidics on Thin and Flexible Films" 10 (10): 1365-1386, 2010

6 Leech, P., "Hot Embossing of Grating-Based Optically Variable Images in Thermoplastic Acrylic Lacquer" 42 (42): 4428-4434, 2007

7 Liedert, R., "Disposable Roll-to-Roll Hot Embossed Electrophoresis Chip for Detection of Antibiotic Resistance Gene Meca in Bacteria" 12 (12): 333-339, 2012

8 Chang, J.-H., "Development of Fluid-Based Heating and Pressing Systems for Micro Hot Embossing" 11 (11): 396-403, 2005

9 Liu, S. J., "Continuous Infrared Assisted Double Sided Roll to Roll Embossing of Flexible Polymer Substrates" 52 (52): 1395-1401, 2012

10 Lu, C., "Analysis of Laser/Ir Assisted Microembossing" 45 (45): 661-668, 2005

11 Fagan, M. D., "A Novel Process for Continuous Thermal Embossing of Large Area Nanopatterns onto Polymer Films" 28 (28): 246-256, 2009