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What is the pad etching process? Is it possible to etch to the bottom metal layers or vias in standard CMOS fabrication?

seyyedali hosseini
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    This is a question that should be answered by the design kit you get from your fab vendor. – The Photon Dec 08 '19 at 15:47
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    Seems like a duplicate [Link](https://electronics.stackexchange.com/questions/470740/unusual-etching-in-cmos-technologies) – Tyler Dec 09 '19 at 00:58

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