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Development of machining technology for non-continuous pattern removing plastic deformation around pattern  

Jeon, Eun-chae (한국기계연구원 나노공정장비연구실)
Je, Tae-Jin (한국기계연구원 나노공정장비연구실)
Chang, Sunghwan (한국기계연구원 나노공정장비연구실)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.9, no.6, 2010 , pp. 1-6 More about this Journal
Abstract
Patterned optical components are widely used for optical products such as LCD and lighting. Since CCFL was used as a light source in the products, prism films having linear continuous optical patterns were widely used. However, LED which is a dot light source is popular recently, therefore, the optical products need new optical components having non-continuous optical patterns. Indentation machining method is a powerful method for machining of non-continuous pattern. When a copper mold and a brass mold were machined by this method, severe plastic deformation called pile-up was observed around the patterns. Since pile-up has negative relationship to ductility, this deformation can be eliminated by annealing treatment which makes the materials ductile. No plastic deformation occurred when machined after annealing at $600{^{\circ}C}$ and $575{^{\circ}C}$ for copper and brass, respectively. Finally, non-continuous optical patterns with high quality were machined on a copper mold and a brass mold successively.
Keywords
Non-continuous pattern; Ultra-fine machining; Pile-up; Indentation;
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Times Cited By KSCI : 1  (Citation Analysis)
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