Abstract

This paper is focused on the de-soldering process on VSON package which was mounted on FR4 substrate board after being subjected to environmental stress. Abnormalities were found at package level during Scanning Acoustic Microscopy (SAM) inspection which is considered to be one of the non-destructive failure analysis processes. Root cause finding involved the investigation of the de-soldering equipment which is suspected to be one of the culprits to contribute to the defect during de-soldering process.

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