FPC flexible plate copper foil oxidation detection method
A detection method and flexible board technology, applied in the direction of color/spectral characteristic measurement, image data processing, instruments, etc., can solve problems such as irreplaceable, short circuit, pad defects, etc., to achieve faster detection speed, strong operability, and simple effect
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[0027] Example
[0028] like figure 1 As shown, a method for detecting oxidation of copper foil of FPC flexible board includes the following steps:
[0029] S1 obtains the color source image I of the FPC copper foil substrate to be detected, specifically:
[0030] In the three-dimensional system measurement, the PFC copper foil substrate is placed in a fixed position in the dark field, the intensity of the white annular cold light source is adjusted, and the color (RGB) FPC copper foil substrate image of the source to be detected is captured by a camera. The copper foil absorbs light with a wavelength less than 580 nm very well, and the reflectivity for light greater than 580 nm is as high as 90%, so it appears red-orange. Copper oxide absorbs light well at wavelengths of 400-780nm because it appears black. The solder resist covered on the copper foil line has an absorption rate of 70% for light with a wavelength of 620-760nm, because it appears brown. The white ring light...
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