Root Cause Failure Analysis of Printed Circuit Board ... - SMTA
Root Cause Failure Analysis of Printed Circuit Board ... - SMTA
Root Cause Failure Analysis of Printed Circuit Board ... - SMTA
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Artwork Artwork Feature Feature Feature Positional<br />
Positional<br />
Tolerances Tolerances Increase<br />
Increase<br />
PCB Tolerances<br />
– Inner/Outer Layer Shrinkage<br />
(Technology / Material<br />
Dependant)<br />
– Some Materials Do Not Shrink<br />
Uniformly<br />
– PCB Size – TCE Impact On<br />
Dimensional Measurements<br />
– Fabrication & Depanelization<br />
Material Movement / PCB<br />
Fabrication Tolerances Artwork<br />
Registration<br />
• As Fabricated<br />
• Pre-routing <strong>of</strong> Array<br />
• After Depanelization