USE OF DIGITAL X-RAY IMAGING AS A PROCESS CONTROL TOOL FOR LEAD-FREE PWB ASSEMBLYAuthor: David Bernard et al.
Company: Dage Precision Industries
Date Published: 9/26/2004 Conference: SMTA International
For example, it has been observed that the new lead-free materials tend to exhibit higher levels of voiding than their tin/lead counterparts, which may impact in-field reliability. This is in addition to potential faults initially implementing a lead-free process may cause. To help ensure production quality control, x-ray inspection is often considered a crucial part the test regime. As a nondestructive technique, x-ray inspection can be used without needing to sacrifice any product, whilst also being able to see otherwise hidden flaws, such as voids within joints.
Recent developments in digital x-ray imaging have further enhanced the analytical capabilities of this technique, including the ability to see very subtle differences in similar-density materials. This paper will discuss and show what process control information digital x-ray imaging can provide to improve PWB assembly quality and reliability.
Key words: Lead-free, process, control, x-ray, inspection
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