Two types of Schottky Diode in TSMC0.18um

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pancho_hideboo

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There are two types of Schottky Diode in TSMC0.18um.
One is with DNW(Deep Nwell) under Nwell.
The other is without DNW under Nwell.

What effect can I expect for these two ?
 

Deep nwell can isolate noise.
 

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