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HMC637LP5E solder void % on exposed ground paddle

Question asked by ericcheng on Mar 17, 2015
Latest reply on Mar 20, 2015 by kkaya

Hi,

 

I've encountered 4 failed cases with HMC637LP5E in recent NPI. With all biasing and sequencing and input/output impedance matching confirmed to be fine. Only two things to look at are;

1. Effects of solder void on thermal dissipation on the exposed ground paddle. Is 30% void spec sufficient for good thermal dissipation?

2. Higher failure rate on HMC637LP5E compared to HMC637ALP5E? Any reliability issue related to HMC637LP5E?

Solder void.jpg

Best Regards,

Eric.

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