How would you even solder a 1020pin BGA (I assume that's 32x32 with the four
central balls missing?)
I say that you'd need to use blind vias, with a lot of layers (I've never
worked on BGA's but would imagine that you might get 4rows/columns per
layer).  My estimate would require around 8layers.  That's if you've got
signals on every layer.  Others would have a much better idea though...


----- Original Message -----
From: "Juha Pajunen" <[EMAIL PROTECTED]>
To: "Protel EDA Forum" <[EMAIL PROTECTED]>
Sent: Friday, September 27, 2002 8:09 PM
Subject: [PEDA] 1020-pin BGA out-routing question (some add)


> Hi again,
>
> <> What is the best PCB layer stack for
> this type of BGA? <>
>
> http://groups.yahoo.com/group/protel-users/files/junk/
>
> There is 1020-pin 1mm pitch BGA. It would be very
> pleasing to have some information and help how to
> route that huge BGA. What are trace width and cap
> between different tracks and so...
>
> It would be very nice if you couldedit that file
> (how to route it) and then send it to me to this
> addrss [EMAIL PROTECTED]
>
> I really need all useful information
> about routing this BGA! :)
>
>
> Sincerely,
> Juha Pajunen, Hw Engineer
> Bitboys Oy
> E-mail: [EMAIL PROTECTED]
> ------------
> NOTE:  This message, and any attached files, may contain privileged or
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> recipients. Any disclosure, copying or distribution of, or reliance upon,
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>

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