| 主权项 |
1. A device of detecting passive routing substrates without contacting, comprising
a heater, said heater heating up a plurality of passive routing substrates; an image capture device, said image capture device being connected with said heater, said image capture device sequentially capturing a thermal image of each of said passive routing substrates to display temperature distribution of said thermal image with different colors; a plurality of noise filters, said noise filters being connected with said image capture device, said noise filters separately filtering noise of said thermal images of said passive routing substrates; a plurality of differential filters, said differential filters being connected with said noise filters, wherein every two neighboring differential filters compare corresponding neighboring two of said thermal images to obtain thermal behavior changing points in between to obtain a thermal behavior difference image of said two of said thermal images; and a comparison module, said comparison module being connected with said differential filters, said comparison module receiving said thermal behavior difference images, said comparison module comprising a first comparator and a second comparator, said second comparator being connected with said first comparator, said first comparator comparing at least two of said thermal behavior difference images to obtain a good passive routing substrate according to distribution of said thermal behavior changing points between said at least two of said thermal behavior difference images, said second comparator comparing said thermal behavior difference image of said good passive routing substrate with each of the other ones of said thermal behavior difference images to estimate a yield of said passive routing substrates. |
