Your best bet, in my opinion is manual fan out routing. You may also want to
consider using micro-via technology for such a dense BGA. Consult with your
Fab house before going down this road, and you may have to consider the cost
of such technology in your design as well.

                           GE Energy Services
Lloyd Good
Development Digitization

Substation Automation Solutions
General Electric Canada, Inc.
2728 Hopewell Place N.E., Calgary, Alberta T1Y 7J7  CANADA
Tel: 403.214.4777,  Dialcomm: 8.498.4777,  Fax: 403.287.7946
Website: www.gepower.com/geharrisenergy/

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-----Original Message-----
From: Michael Biggs [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, March 06, 2002 1:25 PM
To: 'Protel EDA Forum'
Subject: [PEDA] Fanout for BGA's

Is there an auto "fanout" feature in Protel for BGA's or is it all manual
via placement? I have several BGA and one is a 652pin BGA.
thanks in advance for any responces, tricks, or easier ways.

michael b

-----Original Message-----
From: Ian Wilson [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 27, 2002 5:37 PM
To: Protel EDA Forum
Subject: Re: [PEDA] 

At 04:48 PM 27/02/02 -0600, you wrote:

>Yup, you only can see the extent of the component when moving it, I think.
>The method for getting a reasonable zoom and position of the center when
>creating a component freehand (the "wizard" is pretty useless for the parts
>I have to create from scratch) is klunky, at best.  You have to zoom in
>one page-up at a time, and recenter while watching the coordinate display,
>and repeat until the screen shows a reasonable scale for the component.


You can speed this up slightly by zooming in to get the approximate scale 
you want and then doing a J-L (jump location) and entering 0,0 - saves on 
the re-centring.

I will usually start placing the first pad, tab to set the pad parameters, 
zoom in until I see the pad about the size I want and then J-L to jump to 
the required location for this pad (or just 0,0 to get close) and then 
click to place the pad.  The extra time taken to zoom in is minor (no 
re-centring required) but, you are right, it is a bit clunky.  Better would 
be the PCB library zoom starting with about 5 cm (2") extents.

Ian Wilson

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