You have to plug them. The wash can carry nasties inside the package and
then rot it out some indeterminate time later.

Wayne Thayer

On Sun, May 19, 2019 at 7:00 PM Robert Kondner <[log in to unmask]>
wrote:

> My understanding is you really can't clean under certain parts like QFNs
> and
> this probably applies to under the BGAs.
>
> I think you need to use a no clean flux because you will never be able to
> clean those tented vias under a BGA.
>
> I would love to be told otherwise.
>
> Bob K.
>
> -----Original Message-----
> From: TechNet <[log in to unmask]> On Behalf Of Richard Kraszewski
> Sent: Sunday, May 19, 2019 9:54 PM
> To: [log in to unmask]
> Subject: [TN] Washing of Vented BGS's
>
> Say techies
> Do  any of you have a solution for washing vented BGAs?
> We have one site which allows the aqueous wash solution to enter the
> package
> through the vents and another site which plugs the vents with silicone.
> Any thoughts would be appreciated.
>
> Rich  Kraszewski
> Senior Staff Process Engineer
> Phone: (920) 969-6075
>
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