How does psub2 layer affect the mask preparation and separate the substrates?

[SP24]

To isolate different substrates we use psub2 layer.
But it is only a marking layer and it is used only for LVS.
How does this layer impact the Mask preparation and separate the substrates in teh actual device?

 

[milkdragon]

psub2

It is used for LVS purpose only. Nothing to do with actual substrate profile

 

[jing10273]

psub2 layer

It is used for LVS purpose only. Nothing to do with actual substrate profile

yes ,it is a virtual layer only exsited in EDA tools to satify aome rules and for the purpose of convinience,used for LVS,etc.In maufacturing , it does't exist,so you can't use it for any real application.

 

[protonixs]

Re: psub2 layer

psub2 layer is used if there is no Deep N-well to isolate digital blocks from analog blocks.
it is just used to isolate the grounds (analog and digital ground).
these grounds are virtually isolated but they have physical connection through psub.
though they are not actually created during masking, they are very important in LVS verification.

 

[sunny153]

Re: psub2 layer

PSUB2 is just a marking layer.

Actually at the top lavel you should connect all the substrate to one pin, if you are not having DNW process.