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Reply To: | TechNet E-Mail Forum. |
Date: | Wed, 3 Apr 2002 16:45:54 EST |
Content-Type: | multipart/alternative |
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Ahhh vias in pads...what timing. In fact built a board last week that I had
no idea
that they put vias in the pads until the bare fab showed up. Soon as I seen
it I was
screaming like a banshee!!
Them: What's wrong Steve? Why are you so wound-up?
Me: Because there's vias in the pads!!
Them: Is that really a problem? Won't the solder just fill them up?
Me: Yes it will...and take all the solder away from the fillet to do it...
Them: Oh it can't be that bad, the via is so small...
Me: Okay, trust me on this...you'll see.
Go to: http://www.stevezeva.homestead.com and tell me I was right.
Luckily, this is just a pre-production build of 10 boards...I think there is
going to be a redesign after this...hehehe
-Steve Gregory-
> This problem is never ending. I'm working now on the ugliest R/F board
> imagineable. It too has all your problems. However, I have a forward
> thinking engineer who understands the issues involved as you state them. We
> are redesigning and he's recalculating to eliminate those issues. So, it can
> be done. No, unless you redesign, you have a lost cause notwighstanding
> rework adn subsequentg chip cracking due to thermal issues related trying to
> solder the little mutha's.
>
> You can add vias in pads only as micro types or those having been plugged
> and plated over. Still a redesign exists.
>
> On the same note, can someone recommend a good R/F and other electrical
> performance tool that is relatively easy to use? Hell of a question I know,
> but consider the source.
>
> MoonMan
>
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