Patent ID: 9084359
Filing Date: 2015-07-14
Classification: G11B,H05K,Y10T

Abstract:
1. A wired circuit board comprising: a metal supporting layer; an insulating base layer that is formed on the metal supporting layer; a conductive pattern that is formed on a surface of the insulating base layer; and an insulating cover layer formed on the insulating base layer so as to cover the conductive pattern, wherein the arithmetic average roughness Ra (JIS B 0601-1994) of the surface of the insulating base layer at least other than a portion where the conductive pattern is formed is in the range of 0.15 to 1 μm, and the reflectance (incident angle of 5°) of the same with respect to light in a wavelength of 435 to 500 nm is 20% or less, the arithmetic average roughness Ra (JIS B 0601-1994) of a surface of the conductive pattern is in the range of 0.02 to 15 μm, and the reflectance (incident angle of 5°) of the same with respect to light in a wavelength of 435 to 500 nm is 20% or more so that during inspection of the conductive pattern, contrast is enhanced between the conductive pattern and the insulating base layer.