SMTA International Conference Proceedings


Authors: W. James Hall and Phil Zarrow
Company: ITM Consulting
Date Published: 9/25/2005   Conference: SMTA International

Abstract: This paper will discuss the key issues associated with material logistics during the transition to Lead-free and RoHS compliance. The focus of the paper will include material compatibility issues, material identification, moisture-sensitivity, error-proofiing systems and material traceability.

Managing materials has always been a significant task in electronic assembly. Most products contain a large number of different components and most assembly facilities manufacture a variety of products. The heightened focus on cost and quality has increased the need to track, validate, and account for materials and process steps for fault isolation and yield improvement.

The introduction and/or transition to Lead-free and RoHS compliant products complicates the tasks of managing materials and processes. When performing various assembly operations, workers may now have to choose between Tin-Lead and Lead-free materials. The prospect of inadvertently mixing these materials has dire implications from both a legal compliance and a quality perspective.

Such a mistake becomes even more costly if no method is in place to track and identify how many units have been affected. Quite simply Lead-free "raises the stakes" for correct and efficient materials management.

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