An Investigation Into Ball Grid Array Inspection Techniques
An Investigation Into Ball Grid Array Inspection Techniques
An Investigation Into Ball Grid Array Inspection Techniques
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25<br />
<strong>Ball</strong> <strong>Grid</strong> <strong>Array</strong> <strong>Inspection</strong> <strong>Techniques</strong><br />
Figure 26. X-tek perpendicular transmission<br />
image of sample 2 with the location of<br />
(1)missing balls (K8, H8, RI, P14, PI5),<br />
(2) bridges (-K3 alld P3) alld<br />
(3) nOli-wetted pads (K12, L4 alld £10).<br />
Figure 27. HP5DX ball slice lamillography<br />
image of sample 2 with the locatioll of<br />
(1) missing ball at RI,<br />
(2) bridges at KI and P3 and<br />
(3) non-wetted joint at L4.
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