Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Property and Surface Morphology of Copper Foil on the Current Density

구리 박막의 표면형상과 물성에 대한 전류밀도 영향

  • Woo, Tae-Gyu (Division of Advanced Materials Engineering, College of Engineering, Chonbuk National University) ;
  • Park, Il-Song (Division of Advanced Materials Engineering, College of Engineering, Chonbuk National University) ;
  • Jung, Kwang-Hee (Division of Advanced Materials Engineering, College of Engineering, Chonbuk National University) ;
  • Seol, Kyeong-Won (Division of Advanced Materials Engineering, College of Engineering, Chonbuk National University)
  • 우태규 (전북대학교 공과대학 신소재공학부) ;
  • 박일송 (전북대학교 공과대학 신소재공학부) ;
  • 정광희 (전북대학교 공과대학 신소재공학부) ;
  • 설경원 (전북대학교 공과대학 신소재공학부)
  • Received : 2010.09.18
  • Accepted : 2010.10.12
  • Published : 2010.10.27
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Abstract

This study examined the effect of current density on the surface morphology and physical properties of copper plated on a polyimide (PI) film. The morphology, crystal structure, and electric characteristics of the electrodeposited copper foil were examined by scanning electron microscopy, X-ray diffraction, and a four-point probe, respectively. The surface roughness, crystal growth orientation and resistivity was controlled using current density. Large particles were observed on the surface of the copper layer electroplated onto a current density of 25 mA/$cm^2$. However, a uniform surface and lower resistivity were obtained with a current density of 10 mA/$cm^2$. One of the important properties of FCCL is the flexibility of the copper foil. High flexibility of FCCL was obtained at a low current density rather than a high current density. Moreover, a reasonable current density is 20 mA/$cm^2$ considering the productivity and mechanical properties of copper foil.

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References

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