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Ask the Experts

March 11, 2007 - Updated
July 4, 2007 - Originally Posted

Rigid and flex board assembly

We have some boards disconnected in transition zone: between rigid and flex segments. This happens during an assembly process. What is recommended to add to manufacture process in order to strengthen the area?

Anna Seredovaya

Expert Panel Responses

It seems like you are stating that you are having tearing of the flex circuit at the interface with the rigid board? And this is happening during manufacturing? During reflow, handling, or testing? It would seem that this problem could be handled quite simply by ensuring good carrier design. Is there more to this that I'm missing? Feel free to contact me directly with more details.

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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