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Scaling SMT Traceability
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Essegi Automation

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Viscosity Does Not Equal Rheology: What Solder Paste Measurements Really Tell You
Viscosity is a useful solder paste quality control measurement, but rheology provides a more complete understanding of how paste will roll, fill, release, recover, and remain stable during stencil printing.
AIM Solder

Ask the Experts

January 14, 2008 - Updated
January 14, 2008 - Originally Posted

Lead Free Surface Finish

What is the shelf life for PCB's with a Sn/Ag/Cu surface finish (96.5/3.0/0.5)? Can you steer me to some supporting documentation?

J. O.

Expert Panel Responses

There is limited data on shelf life for SAC HASL I would recommend you use the IPC steam aging test to independently confirm shelf life.

Dr. Craig D. Hillman
CEO & Managing Partner, DfR Solutions

Dr. Hillman's specialties include best practices in Design for Reliability, strategies for transitioning to Pb-free, supplier qualification, passive component technology and printed board failure mechanisms.

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Gripping Systems from micro assembly to heavy lifting
The first industrial-suited grippers from SCHUNK were a milestone. Since then we have brought countless newly and further developments to market.
SCHUNK