where we can place vias GND in eagle ?

[samsoun]

Hello,
Can any one advice me about the emplacement of the vias GND in my PCB.
Should I made it on the side (top) of my component or just near it ?
And for each component Sould I add a vias or one for all ?

Many Thanks

 

[KlausST]

Hi,

it is not clear what you mean.
Vias are placed in the "vias" layer.

Tell us more about xour pcb, or show pictures.... because there are so much possibilities....

Klaus

 

[samsoun]

I would like if I should place vias directly on SMD pads. Is this a normal/acceptable practice to follow? Or is it recommended/better to put a short trace and then have a via?

 

[ge]

Depends on component, application and on requirements. Vias under pads will be an issue if having components put down with paste and a reflow oven. Vias under pads result in better RF/microwave performance.

<< The paste runs thru the vias and makes the assembly house mad. This is << less of an issue using solder. Via under pads have better thermal
<< performance. Can you provide details of the parts?