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Filler cell design (pp layer combination)

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AllenD

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Hi Guys
I am designing a filler cell for my mixed signal circuit. I design is with 2 principles:
1. There is no such thing as too many substrate contact
2. I want to add sufficient bypass caps

So, this is my single filler cell Screenshot from 2019-05-01 15-42-45.png
In the center is a dc bypass cap and surrounded by a guard ring from substrate contact to high metal layers. As we can see, the substrate contact is enclosed by a PP layer (p+ ion implantation)

Then this is a cluster of filler cells
Screenshot from 2019-05-01 15-44-24.pngScreenshot from 2019-05-01 15-43-16.png
I realized my design of filler cell caused these pp layers connected all together. DRC and ERC did not report and problem

I am not clear on the purpose of the pp layer and I just know that pp drawings should surround the substrate contact. But for best design, do you think this amalgamated pp layers will be problematic?

Thanks
Allen
 

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