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Just Ask Happy: Stacked Microvia Reliability Issues
July 1, 2020 | I-Connect007 Editorial TeamEstimated reading time: Less than a minute
We asked for you to send in your questions for Happy Holden, and you took us up on it! The questions you've posed run the gamut, covering technology, the worldwide fab market, and everything in between. Enjoy.
Q: Stacked microvias look good on paper, but they may have reliability problems. What are the best rules for designing stacked microvias to ensure a reliable PCB?
A: The current best practice is stacking no more than two layers, and then moving over for the next buried or blind via or stacking two layers there. The stacked vias should never be stacked on any buried vias.
An IPC committee is currently testing various stacked via configurations to have a comparison for reliability and testing coupons and design. Hopefully, they will also get at the root cause of why stacked microvias are failing at their interface.
To pose your own question for Happy Holden, take the survey by clicking here.
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The Government Circuit: Support for Defense Spending Takes Top Priority
10/15/2024 | Chris Mitchell -- Column: The Government CircuitFor those of us living in the world of politics and policy, the final few weeks before a major election are a little nerve-wracking. Who is going to win? How might the candidates’ campaign promises affect our industry and our strategies over the next few years? One thing I do know: No matter who wins the White House and control of Congress on Nov. 5, IPC will continue working with members of both major parties to advance policies that boost innovation, investment, and growth and ensure the electronics manufacturing industry’s long-term success. We must.