The order of priority if from left to right of that Design Rules Dialog box. Default being the least priority, Class the next one and so on up to Component being the highest.
In other words, Assigning a rule to a Net takes priority over a rule in a Class where that net is a member.
Having said that, I would use the Nets Rules to assign a specific rule between two nets.
However, there is no way to set a specific rule for a specific via. With more details about what you are trying to achieve, I could probably help.
Which version of PADS standard are you using ?
Thank You very much for your help. I am using Pads 9.4.
I have attached two images.
1) the first image "Via" is a via. I just want that two via to flood over with no thermal spoke. what should I do ?
2)the second image "pin", I also want to flood over this two pins without thermal spoke but would like to keep all other pins with thermal spoke. what should i do ?
3) the third image is the clearance you suggested. I clicked nets. I clicked 48_INPUT(+) and i clicked clearance. But lets say I want 40Mil clearance between 48_INPUT(+) and AGND. how do i do that ?
Ok, PADS 9.4 ... pretty old to me ;-)
I'm using VX.2.3
1.) Via flooding is specified at the Plane Shape level:
2.) Pin flooding is usually done at the Decal Level, within the Padstack:
But can also be done at the Component Level in Layout (not prefered as an Update Part would revert to Library):
3.) Once you have assigned a rule to a net, that same net can not be assign a different rule in the same category (in this case Nets). Instead, I would define the rule between the first two nets as before, but I would also create a Class containing these two nets and a Class containing AGND then assign a rule between the two Classes. Conditionnal Rules could be something else to use ...
Since all of the three nets have to be away by 40mils, why not simply put them into the same Class and set the clearance to 40mils in there ?
Of course, you probably don't only have these 3 nets to deal with ... so the rest of the Rules have to be set accordingly ;-)
I am using PADS Professionnal VX.2.3 ... and soon will drop PADS Standard as it is not as powerful and efficient as PADS Professionnal.
Thank You so much for your help. Really appreciated. I was trying to do the flooding the PIN but it seems Pads 9.4 does not have that option. I cant find that
I appreciate your help
I am trying to make a trace at the top and also at the bottom. But after i connect to the top and go to the bottom to make another trace. The top one goes of. Why is it ?. Is there any command to make double traces ? Please help.
Also I see alot of rats nest in the layout but when i run verify design it doesnot show any error. Why is that ?
I am assuming you are routing using PADS Router ?
I am using Pads layout. Thank you
You need to selected the Nets under the View List ...
Thank You for your help. I did that but still it has rast nest.
Can I ask how do you connect a trace to a plane without a via. I want to run a trace from a pin and want to connect to a plane but for some reason i can only connect to the plane through a via.
It really sounds like you need a training on PADS Layout.
Trying to help you here is kind of very difficult as I would need to show you what to do rather then telling you what to do through messages back and forth.