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March 2007

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Subject:
From:
"Stadem, Richard D." <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Stadem, Richard D.
Date:
Tue, 20 Mar 2007 09:31:10 -0500
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text/plain (123 lines)
Evamaria is correct. This does not meet the acceptance criteria of the
PWB, which is listed in IPC 6012, amongst other documents. Etching flaws
are described within that document. This is an etching flaw, where a
scratch in the mask allowed the copper within the pad to be etched away
during fabrication. 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jones, Evamaria
Sent: Tuesday, March 20, 2007 9:11 AM
To: [log in to unmask]
Subject: Re: [TN] Pad damage

Does it meet the drawing? If not it is a defect.
 
Evamaria Jones
Quality Assurance Specialist
Electronic Manufacturing Skills Instructor General Dynamics Information
Technology
(703) 874-6796 direct
(540) 522-8823 cell
[log in to unmask]
www.gdit.com
<https://owandhm.gd-ns.com/exchweb/bin/redir.asp?URL=http://www.gdit.com
/> 

________________________________

From: TechNet on behalf of West, Jim
Sent: Tue 3/20/2007 10:07 AM
To: [log in to unmask]
Subject: [TN] Pad damage



Hi everyone,

Take a look at the link
http://stevezeva.homestead.com/files/Pad_Damaged.jpg
<http://stevezeva.homestead.com/files/Pad_Damaged.jpg>

Tell me what you think about the pad damage shown.  I have not come
across anything like this before, and was asked by our group leader if
this was acceptable.  My initial thought was this is not acceptable and
we should reject the board.  As always, I wanted to point out the IPC
section that would explain why this is not good.  However, I could not
come across anything except for section 10.2.9 (Laminate
conditions-conductors/lands).  I know there is probably a section I am
overlooking? 

There is still a high percentage of the pad intact and no evidence of
lifting.  Is this something common that others have seen?  If so, what
do I tell the board house to look out for to prevent something like this
in the future?

Would anyone accept this?



Thanks, 




<http://stevezeva.homestead.com/files/Pad_Damaged.jpg>



Jim West
Engineering Manager
Nexergy Inc.
www.nexergy.com
tel: (614) 351-6216
fax: (614) 324-1979



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