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Sensors 2008, 8(2), 877-885; doi:10.3390/s8020877

Micro Dot Patterning on the Light Guide Panel Using Powder Blasting

Dept. of Mechanical Engineering, Univ. of Incheon, 177 Dohwa –Dong , Nam-Ku, Incheon, Korea
Division of Mechanical Engineering, Inha University, Incheon 402-751, Korea
Author to whom correspondence should be addressed.
Received: 10 January 2008 / Accepted: 6 February 2008 / Published: 8 February 2008
(This article belongs to the Special Issue Modeling, Testing and Reliability Issues in MEMS Engineering)
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This study is to develop a micromachining technology for a light guidepanel(LGP) mold, whereby micro dot patterns are formed on a LGP surface by a singleinjection process instead of existing screen printing processes. The micro powder blastingtechnique is applied to form micro dot patterns on the LGP mold surface. The optimalconditions for masking, laminating, exposure, and developing processes to form the microdot patterns are first experimentally investigated. A LGP mold with masked micro patternsis then machined using the micro powder blasting method and the machinability of themicro dot patterns is verified. A prototype LGP is test- injected using the developed LGPmold and a shape analysis of the patterns and performance testing of the injected LGP arecarried out. As an additional approach, matte finishing, a special surface treatment method,is applied to the mold surface to improve the light diffusion characteristics, uniformity andbrightness of the LGP. The results of this study show that the applied powder blastingmethod can be successfully used to manufacture LGPs with micro patterns by just singleinjection using the developed mold and thereby replace existing screen printing methods. View Full-Text
Keywords: Powder Blasting; Light Guide Panel; Micro Dot Patterning; Matte Finishing; Injection Mold; Brightness Powder Blasting; Light Guide Panel; Micro Dot Patterning; Matte Finishing; Injection Mold; Brightness

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Jang, H.S.; Cho, M.W.; Park, D.S. Micro Dot Patterning on the Light Guide Panel Using Powder Blasting. Sensors 2008, 8, 877-885.

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