Vias for WLCSP34

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Wed, 2018-10-10 05:35

hqf2013

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Vias for WLCSP34

Hi Dialog,

I need more then 6 IO pins for my application with the WLCSP footprint. Since micro vias, i.e. 0.1mm Φ, are expensive here, is it possible to use normal vias （0.2 mmΦ）in the WLCSP empty area as shown in this figure?

附件:

figure.pdf

Device:

DA14580

Wed, 2018-10-10 16:52

PM_Dialog

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Hi hqf2013,

Placing vias at the left open places is a little bit risky. We left those positions open by purpose, because RF inductors are placed at this position on the die. So, strongly recommend you to NOT use either micro vias or normal vias in those positions.

Thanks, PM_Dialog

Thu, 2018-10-11 01:09

(Reply to #2) #3

hqf2013

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Ok. Thank you for reminding

Ok. Thank you for reminding me.