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Title:
BLACKENED SURFACE-TREATED COPPER FOIL, METHOD FOR MANUFACTURING BLACKENED SURFACE-TREATED COPPER FOIL, COPPER-CLAD LAMINATE AND FLEXIBLE PRINTED CIRCUIT BOARD
Document Type and Number:
WIPO Patent Application WO/2014/133164
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a copper foil for a printed circuit board, the copper foil having: a blackened surface capable of improving CCD visibility during terminal connection processing and precision of flexible printed circuit board AOI detection; an appropriate roughness suitable for manufacturing flexible printed circuit boards; and favorable etching properties. To achieve said purpose, a blackened surface-treated copper foil, etc. for manufacturing flexible printed circuit boards is used, the foil being characterized in that the roughened surface of the surface-treated copper foil with a roughened surface is a black roughened surface for which the maximum high-low difference of the undulations (Wmax) is 1.2 µm or less and which is provided with a color tone having a L*a*b* color system lightness (L*) of 30 or less.

Inventors:
MIZOGUCHI, Misato (LTD. Electronic Materials Sector 656-2, Futatsumiya, Ageo-sh, Saitama 17, 〒3620017, JP)
OBATA, Shinichi (LTD. Electronic Materials Sector 656-2, Futatsumiya, Ageo-sh, Saitama 17, 〒3620017, JP)
TATEOKA, Ayumu (LTD. Electronic Materials Sector 656-2, Futatsumiya, Ageo-sh, Saitama 17, 〒3620017, JP)
HIRAOKA, Shinya (LTD. Electronic Materials Sector 656-2, Futatsumiya, Ageo-sh, Saitama 17, 〒3620017, JP)
HASHIGUCHI, Takashi (LTD. Electronic Materials Sector 656-2, Futatsumiya, Ageo-sh, Saitama 17, 〒3620017, JP)
Application Number:
JP2014/055173
Publication Date:
September 04, 2014
Filing Date:
February 28, 2014
Export Citation:
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Assignee:
MITSUI MINING & SMELTING CO., LTD. (11-1, Osaki 1-chome Shinagawa-k, Tokyo 84, 〒1418584, JP)
International Classes:
C25D7/06; C25D3/38; H05K1/09
Domestic Patent References:
WO2012046804A1
WO2007105635A1
Foreign References:
JP2009176768A
JP2004263300A
JP2009004423A
JP2010013738A
Attorney, Agent or Firm:
YOSHIMURA, Katsuhiro (Yoshimura International Patent Office, Omiya F Bldg. 5-4, Sakuragicho 2-chome, Omiya-ku, Saitama-sh, Saitama 54, 〒3300854, JP)
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