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Precise placement of vias relative to nearby BGA pads

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josh_l
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Precise placement of vias relative to nearby BGA pads

Hi,

 

Is there an easy and efficient way when routing traces through a BGA to place a via precisely dead centre in the space between the 4 adjacent BGA pads? I realise this can probably be done mathematically using the inspector etc, but for a 192 pin fine pitch BGA dotted with 6mil vias that would be a nightmare, as we're getting into decimal points and lots of calculations. I am able to place them within the bounds of my DRC rules, but it bothers me when checking the outputted manufacturing files that the vias are very slightly off centre in their allocated space depending on how my mouse technique was when I placed that particular via. If they can be dead centre that would maximise the chances of a good build in the physical world.

 

Is there some method in Fusion 360 of placing/aligning vias relative to their neighbours that I'm unaware of? I imagine this is quite a common question?

 

Thanks for your help!

 

Josh

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jorge_garcia2
in reply to: josh_l

Hey @josh_l ,

 

The easiest way to do this is to set the grid (or alt  grid) to be half of the pitch between BGA pads. That will allow you to place them precisely just by clicking with no math.

 

Let me know if you continue to run into problems.

 

Best Regards,



Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

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