[PCB_FORUM] Re: How To add Bump Pad?

I just read my own post and was pretty disgusted with my grammar.  Please let me know if there was any part of it that was too bad to understand.



 

From: "Bolman, Shirley H" <shirley.h.bolman@xxxxxxxxx>
Reply-To: icu-pcb-forum@xxxxxxxxxxxxx
To: <icu-pcb-forum@xxxxxxxxxxxxx>
Subject: [PCB_FORUM] Re: How To add Bump Pad?
Date: Tue, 26 Dec 2006 10:20:11 -0800

Not sure I can help much but can’t you add the pad as a mechanical feature. It sounds like it would the a

surface only pad that is not connected to pwr/gnd or anything.

 

One warning though, because these are not part of the footprint, they will not move with the rest of the

pads if the footprint has to be moved for any reason.

 

Shirley in Oregon

It is a PRIVILEGE to be born free.
    It is a RIGHT to live free.
        It is a DUTY to die free.

From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Bob McCreight
Sent: Tuesday, December 26, 2006 9:55 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] How To add Bump Pad?

 

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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