Vared:
        There is an BGA undercoat called Floropel. It coats everything
with a very thin film. Also there are Epoxies that are made to under
fill BGAs that can be injected with a coating machine. 
        Regards,
        Ramon



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Wayne Thayer
Sent: Monday, November 20, 2006 2:10 PM
To: [log in to unmask]
Subject: Re: [TN] BGA and conformal coating

Vered-

We always underfill prior to coating.

Wayne Thayer

>>> [log in to unmask] 11/20/2006 1:47 pm >>>
Vered,

I would start with IPC-A-610 and J-STD-001 documents. One item that is
over looked is that spraying a board with for example type AR or type UR
does not coat the BGA solder balls/solder connections located under the
BGA so you are violating the acceptability requirements in IPC-A-610!

Good luck,
- Joe


-----Original Message-----
From: Vered BS [mailto:[log in to unmask]]
Sent: Monday, November 20, 2006 8:40 AM
To: [log in to unmask]
Subject: [TN] BGA and conformal coating

looking for reviews/articles or case studies regarding conformal coating
on BGA for military/aerospace environment Appreciate any comment or
sharing your experiance Thanks Vered

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