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Question about the top metal in power DMOS layout

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lqy

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From some examples, I found many power DMOS layout using the "interdigited" structure on the top metal.
If I only use half area top metal to Source/Drain, that is to say, half area for source and half area for drain, are there any different? Thanks a lot.
 

Power DMOS Layout

Sure. The parasitic series resistors to source and drain will increase.
 

Power DMOS Layout

High volt model L49 not accurny

maybe you can use Level66 88 or 101
 

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