What is SUBSTRATE PLUGGING?

[ramesh441]

Hi Every one,

Can I know what is SUBSTRATE PLUGGING in Analog Layout Design?

 

[erikl]

I think it's the same as SUBSTRATE TAPPING, i.e. providing low-ohmic connections from the substrate via a p+ region (in case of a p- substrate), contact to Metal_1 and a fully metal wire connection to GND (gnd!), not too far from all nMOS sources (these are the necessary nMOS body connections).

 

[ramesh441]

Thanks for the reply,

Can I know how could it be done on tool.
I am working on Virtuoso environment.

Is there any tutorial explaining that.


Thanking you,
RamesH

 

[erikl]

Can I know how could it be done on tool.
I am working on Virtuoso environment.

How to create the substrate contacts depends on the PDK used. Some PDKs provide special cells for it, e.g. "subc".

Is there any tutorial explaining that.

I think the UCLA EE115C - Tutorial 3 from Prof. Dejan Markovic (Winter 2007) explains it quite well. You can download it **broken link removed** via shashikumar.22's posting from Thu, 14 Jan 2010 12:24 (2.rar). Download & unzip it, then open it and scroll down until "Creating Substrate Contacts".

 

[ramesh441]

Thank you Somuch for the reply