TR7500E_Manual_en_v28 - 第218页

C h a p t e r 3 A O I A T P G F u n c t i o n i n s t r u c t i on T R 7500 U S E R M A N U AL 2 11 n B / W T h r e s h o l d – S e t t h e t h r e s h o l d t o j u d g e t h e b l a c k a n d w h i t e . n B r i g h t …

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Chapter 3 AOI ATPG Function instruction
TR7500 USER MANUAL
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l To check missing, shift and bending of IC lead. Use image correlation method
(Method2); grab a good image model for sample. Compare with test lead to find
the defect.
l Pass level setting
n Similarity – The similarity between standard image and inspected image.
n Shift X – The tolerance of shift on x direction.
n Shift Y – The tolerance of shift on y direction.
n Skew Difference – The tolerance of position difference between the
neighbor boxes.
11.2.3. Void
l To check no solder, open, polarity of components. According to set Threshold
and Bright Ratio to find the defect. Bright (Dark) is a method to find the
darkness (brightness).
l Pass level setting
Chapter 3 AOI ATPG Function instruction
TR7500 USER MANUAL
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n B/W Threshold – Set the threshold to judge the black and white.
n Bright Ratio –It means the tolerance of white ratio.
n TEST Method
u Bright – If the white ratio over the tolerance, the inspection box will be
regarded as failed.
u Dark –If the white ratio is lower than the tolerance, the inspection box
will be regarded as failed.
11.2.4. Lead void
l To check no solder or open of IC lead. Algorithm is as same as void window.
Difference is not calculating the bright area as denominator when trains lead void.
l Pass level setting
n B/W Threshold – Set the threshold to judge the black and white.
n Bright Ratio – It means the tolerance of white ratio.
Chapter 3 AOI ATPG Function instruction
TR7500 USER MANUAL
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11.2.5. Pin
l To check shift, over (low) solder or open of components. By setting threshold
and High/Low ratio to check NG or not. When user trains pin window, software
will memorize the bright zone as 100.
l Pass level setting
n B/W Threshold – The threshold to judge the black and white.
n High Ratio – Set the tolerance ratio that the box can’t exceed.
n Low Ratio – Set the tolerance ratio that the box can’t be smaller than.
11.2.6. Solder
l To check the bridge of IC leads. When user trains the solder, threshold will be
automated setting according to surrounding area. Solder will check outward from
window. If 7(10) pixels’ exceeds the threshold, it will show fail in standard (high)
235%(OS:135)
40%(LS:-60) 100%