I think it is save to use conventional vias Until 0.5mm pitch of BGA.(As i
read in a pcb magazine)

> ----------
> From:         Keith Short[SMTP:[log in to unmask]]
> Reply To:     DesignerCouncil E-Mail Forum.;Keith Short
> Sent:         Wednesday, January 10, 2001 10:08 AM
> To:   [log in to unmask]
> Subject:      [DC] Routing suggestions on 0.8mm uBGA
>
> Hi All,
>         We are about to use a 0.8mm pitch uBGA on our latest design, and
> as we only
> have the one device of this type on the board, would like to avoid using
> uVias.
>         Has anyone routed this type of device using conventional vias.
>
>         We use a 0.45mm pad on the uBGA.
>
>         Any help and/or suggestions would be appreciated.
>
> Thanks
> Keith
>
>
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