Hi Mark,

Yes, you can break it out on two layers, but the middle PINS in that
package will require microvias, in the pads. It can be done, and there
are plenty of fab houses willing to do those boards. What I would
suggest is to go to your fab house and work the breakouts out with them.
They will give you the answers you need, and you'll give them a board
they can handle.

Good luck.

Mitch

---------Included Message----------
>      Date: Tue, 20 Aug 2002 16:34:06 +0100
>      From: "Matthew Lamkin" <[log in to unmask]>
>      Reply-To: ""(Designers Council Forum)""
<[log in to unmask]>, "Matthew Lamkin"
<[log in to unmask]>
>      To: <[log in to unmask]>
>      Subject: Re: [DC] 104 pin BGA
>
>      Be careful, if you manage to do that they will be asking for the
whole board
>      on only 2 layers....
>
>      If its a 6 layer board then why only breakout on 2??
>
>
>
>      > -----Original Message-----
>      > From: Mark Mainland [SMTP:[log in to unmask]]
>      > Sent: Tuesday, August 20, 2002 2:26 PM
>      > To:   [log in to unmask]
>      > Subject:      [DC] 104 pin BGA
>      >
>      > Hello,
>      > Is it possible to break out on only 2 layers with a 104pin BGA?
Its going
>      > on a 6 layer and the customer only wants traces on top and 1
internal
>      > layer!
>      >
>      > Thanks,
>      > Mark
>      >
>      >
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