| 摘要 |
PROBLEM TO BE SOLVED: To easily identify a metallic mark layer on a photographing picture on the surface of a board by coloring a resin solder resist layer so that the color tone and/or lightness of a wiring background area in a background area are approximated to those of a wiring pattern area. SOLUTION: In a printed wiring board 1, a resin solder resist layer is colored so that the color tone and/or the lightness of a wiring background area 28 being a remaining part from which a wiring pattern area 27 is removed are approximated to those of the wiring pattern area 27 whose by a fluoroscopic form in a background area in the background area of a metallic mark layer if a board face where the resin solder resist layer is formed is viewed. The resin solder resist layer is colored by mixing the coloring agent of dye and pigment in a resin material. When the resin material is achromic, coloring is executed so that a hue similar to that of coloring agent is given by mixing coloring agent, for example.
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