Die size versus flag size in QFN

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VTiederle
Sherlock User
Posts: 39
Joined: 24 Jul 2013, 12:32

Die size versus flag size in QFN

Post by VTiederle » 20 Jul 2017, 07:36

Sherlock doesn't allow to have smaller die size than flag size. Is this restriction correct?
I found out that the thermal behavior of QFN is depended to the soldered area and not really from the flag size itself.
Due to some layout reasons it could be possible that the soldered area is smaller than the flag size.

Can you give some advices how to define the parameters to get realistic simulation result.

natalieh
Site Admin
Posts: 53
Joined: 01 Nov 2016, 08:43

Re: Die size versus flag size in QFN

Post by natalieh » 13 Sep 2017, 20:18

Hi Viktor,

Great question! This issue is specifically addressed in the new QFN model, releasing tomorrow! Please update when you can and let us know what you think.
Natalie Hernandez, PhD
Product Manager
DfR Solutions
nhernandez@dfrsolutions.com

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