[PCB_FORUM] Re: How To add Bump Pad?

Bob,

Is this a surface mount pad?  I am not exactly sure what bump pad is, but if it is a surface mount pad would it be ok to just have a etch shape for that area?  Maybe solder resist film mask with appropriate long with it? (Matching your pad setup)  I am not sure if this is what you are looking for.  I hope it helps.

From:  Bob McCreight <bobmccr8@xxxxxxxxx>
Reply-To:  icu-pcb-forum@xxxxxxxxxxxxx
To:  icu-pcb-forum@xxxxxxxxxxxxx
Subject:  [PCB_FORUM] How To add Bump Pad?
Date:  Tue, 26 Dec 2006 09:54:36 -0800 (PST)

I am all alone in the office and in need of some assistance...
  
 
  
How do you go about adding a free pad (or four)?
  
 
  
This is for an Allegro 15.5 layout. I wish to place a bump pad at
  
each corner of my BGA devices without modifying the part footprint.
  
Seems like such an easy thing to do but I am stumped :-(
  
Tried doing a sub-drawing from a reference design but that process
  
is not cooperating. What is the trick?
  
 
  
Thanks in advance for your help!
  
 
  
Bob McCreight, C.I.D.
  
 

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