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#analog-design
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# analog-design
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Boris Murmann

05/13/2021, 3:27 AM
@User Just wondering if you've been able to find out about the substrate type from SkyWater (non-epi versus epi)? Thanks!
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Tim Edwards

05/13/2021, 1:15 PM
I emailed them, and so did Mohamed Kassem, and neither of us has heard anything back.
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Boris Murmann

05/13/2021, 9:10 PM
@Tim Edwards, @mkk FYI -- I just found out from a reliable source that the substrates are non-epi.
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Tim Edwards

05/13/2021, 9:28 PM
Okay, thanks. If SkyWater comes back eventually and contradicts your source, I'll let you know. Otherwise, I'll take that as the answer.
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stefanoaz

05/17/2021, 11:40 PM
So I assume that bulk substrate implies higher substrate resistivity - not bad for noise isolation. I see from the layer doc that we have iso p-well and deep n-well to help make our own isolation areas.