Smart Gui - Algorithm Training Material_rev1.pdf - 第122页
Copyright © ViT rox All Rights Reserved . 122 For this case: Lead Height set to 100 um Slope SolderHeight Thres set to 50 um Measured Fillet height = 135 um Measured Fillet Height > Fillet Height Thres Why Failed??? S…
Copyright © ViTrox All Rights Reserved.
S-type Algorithm - Joint (Solder Profile Inspection)
121
1. Identify Pad Area:
● Must have epad information.
● If no manually add the pad
location.
2. Identify Solder Toe area:
● Good solder slope - Pass
● Flat Solder - Proceed to cold solder inspection.
Pass
Fail
Pass
3. Identify Cold Solder:
● The solder height threshold will affected by
the lead height (s,u) & Body Height (B) set.
(Next Page)
Flat solder / Excess Solder
Copyright © ViTrox All Rights Reserved.
122
For this case:
Lead Height set to 100 um
Slope SolderHeight Thres set to 50 um
Measured Fillet height = 135 um
Measured Fillet Height > Fillet Height Thres
Why Failed???
S-type Algorithm - Joint (Solder Profile Inspection)
Copyright © ViTrox All Rights Reserved.
123
Take Note!
● Lead Height must set correctly
● The Lead Height set will be the reference
height for lead.
● When Lead height measured > Lead Height
set, Lifted Lead occur
● Results in the Slope Solder Height Thres
increased
● For component without led, body height will
replace lead height.
At the condition when:
Lead Height Measured = 342um
That’s mean the lead lifted by:
342um-100um = 242um
Results in
Slope Solder Height Thres = 50um (set) + 242um (Lifted)
= 292um
Therefore,
For any pixels with slope solder height > 292um only consider as
a pass pixel.
Lead Height set to 100 um & Slope Solder Height Thres set to 50um
S-type Algorithm - Joint (Solder Profile Inspection)