Hei Juha, I currently don't have the time to work out a detailed routing strategy, but if I hear of such a biest I would consider blind/buried vias. If you choose to go to microvias you even can place them within the BGA pads! Depending the overall complexity I would recommend a 2+N+2 stack in microvia technology (if assembled double sided and dense). This means vias from Top to Mid1, Mid1 to Mid2, Bottom to Bottom-1, Bottom-1 to Bottom-2 and thru the whole stack (these are conventionally drilled). Depending your actual project you may be able to simplify this.
Hope this helps Emanuel Juha Pajunen wrote: > 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] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
