How to generate the Auto shape for composite layers

[soodamanikannan]

I am using Allegro 15.2V

For composite design.I made a composite layers using anti ETCH layer.

Example :-Internal layer A as composite, I gave the coressponding AntiEtch layer respective traces clearence.I follwed mentioned method for designs.

But recently i viewed one document We can generate the auto shapes for composite layers. Using net properties. I set the net propertites( clearences for other nets) for GROUND NET and place the shapes but its not work properlly.

Any body can give the gudience please.

Thanks in advance.

 

[marce]

By composite layer do you mean a positive and a negative layer combined to give a track layer with copper pour?

 

[soodamanikannan]

HI marce,

yes correct

 

[marce]

I would reccomend doing the layer as a positive layer, and use templates and copper pours to create the desired result. That way the copper when poured will obey your copper to track/Pad clearances.

 

[soodamanikannan]

I would reccomend doing the layer as a positive layer, and use templates and copper pours to create the desired result. That way the copper when poured will obey your copper to track/Pad clearances.

HI marce,

ould you please explain about templates?

Thanks you.

 

[marce]

I'm not very up to date with allegro, had a go and believe you use add shape, to create an area in which to pour the copper. Sorry I cant be more specific, I had a go this morning but its nearly three years since I used it (Allegro) in anger and I have forgotton a lot of the way it works.
I will have another go and see if I can remember.

 

[soodamanikannan]

Hi marce,

Thanks for your reply.