The relationship between track and via size

[neena]

hi

is there any relatioship with track vs via size
if i have a track width of 30 mils
what will be the via size that to used
is there any standards for vias


regards
.........

 

[IanP]

pcb via size

The minimum via hole size used will have a significant effect on the cost of the board as it limits the number of PCBs that can be drilled as a stack. Not withstanding the radio performance implications of small diameter via holes, typical minimum sizes of 0.25 mm are commonly used. A reduced cost will be achieved if the minimum hole diameter of 0.5 mm can be used.

Quoted from: **broken link removed**

Regards,
IanP

 

[Davood Amerion]

minimum via size

I think 20-28mil is good.
but if the current pass trough it is high you must use more than one via for it.

 

[neena]

via size current

hi
for a four layer board of thickness 2mm
wat will be the thickness of conductor dielectric and plane
can any one help me by giving more details about that
or is there any standards to be followed

 

[binu G]

standard via size

depending on the density of the board u can adjust the via size.
normally anular ring of 7 mil is must .

for a 30 mil track u can go for 21mil drill and 37mil pad.

 

[nagaraj_hsmn]

pcb via sizes

0.5mm width annular ring.

 

[vijay.kumarreddy]

recommended via sizes

Its a reliability issue,According to the current density u can place the via size.generally we used to take 3-4 times the min current density required..

vijay

 

[touringmike]

pcb minimum via size

hi

is there any relatioship with track vs via size
if i have a track width of 30 mils
what will be the via size that to used
is there any standards for vias


regards
.........

Track width normally has nothing to do with via size. Aspect ratio of the board does in a normal drilled board set-up.
The accepted ratio is 6:1. So, for a .062" board, .010" would be the minimum drill size for a via.
Anything smaller would mean a premium fabrication charge, including Laser Vias which are usually smaller than .007 dia.

 

[btbass]

via sizes

In terms of current, rule of thumb, a via the same diameter as the track width can take 3 times the current of the track.

 

[binu G]

via size for 11 mil trace

Its a reliability issue,According to the current density u can place the via size.generally we used to take 3-4 times the min current density required..

vijay

i wonder if in that case the via size will increase with respect to current !.
then iam sorry my friend. u can use multiple via for a better connectivity, named as seeding!

 

[steph]

via size versus current

Hi Neena

In my case, You do not need to know
the track for a line width.
But you have to know the current needed?

use via in trace calculator from

**broken link removed**

Steph

 

[Rame]

via size pcb

Hi Folks,

It again depends on what frequency it is operating(Like rise and fall time,current rating etc..

Only with sufficient information one can able calculate the via

For 30 Mil trace,we can have 40 mil dia with 30 mil drill.I think this will solve your problem.


Regards

Rame