Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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A Study on the Surface Characteristics of Injection Mold and Injection Molded Part depending on LGP-Mold Fabrication Methods

도광판 금형의 제작 방법에 따른 사출금형 및 성형품의 표면특성에 관한 연구

  • 도영수 (한국생산기술연구원 정밀금형팀) ;
  • 김종선 (한국생산기술연구원 정밀금형팀) ;
  • 고영배 (한국생산기술연구원 정밀금형팀) ;
  • 김종덕 (한국생산기술연구원 정밀금형팀) ;
  • 윤경환 (단국대학교 기계공학과) ;
  • 황철진 (한국생산기술연구원 정밀금형팀)
  • Published : 2007.12.01
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Abstract

LGP (Light Guiding Plate) of LCD-BLU (Liquid Crystal Display - Back Light Unit) is one of the major components that affect the product quality of LCD. The optical patterns of LGP(2.2") molds are fabricated by three different methods, namely, (1) laser ablation, (2) chemical etching and (3) LiGA-reflow, respectively. The characteristics of surface patterns and roughnesses of molds and injection molded parts were compared to evaluate the optical characteristics. The optical patterns of injection molded LGP with mold fabricated by LiGA - reflow method showed the best geometric structure. The surface roughness (Ra) of LGP#s with molds fabricated by (1) laser ablation: $Ra={\sim}31nm$, (2) chemical etching: $Ra={\sim}22nm$, and (3) LiGA-reflow: $Ra={\sim}4nm$.

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References

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