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 > confidential information. It is intended for use only by the designated > recipients. Any disclosure, copying or distribution of, or reliance upon, > this message by anyone else is strictly prohibited. > * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[email protected] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
