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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ido Mashall
Sent: Friday, October 03, 2008 1:13 PM
To: [log in to unmask]
Subject: [TN] Barrel and Corner cracks in copper elctroplating

 
Hello technet

We are suffering a serious problem of barrel and corner cracks in the
pattern copper plate bath.
Please look at the following pic. (all after 288C solder thermal stress)

http://www.drivehq.com/file/df.aspx/shareID4765976/fileID233954134/eo-d3
497-1.jpg
 
http://www.drivehq.com/file/df.aspx/shareID4765976/fileID233954135/es-c9
633-1.jpg
 
http://www.drivehq.com/file/df.aspx/shareID4765976/fileID233954138/as-d3
715.jpg

This very strange phenomenon occurs only in the second copper, and does
not occur in the panel plated copper.

After testing all bath components, they seem to be ok. CVS is oK, hull
cell is OK. It seems the copper lost its mechanical properties.

We are looking for possible contamination and changed the bath for a new
fresh bath, and it happens again after a few days..

Does somebody have some idea why this cracks can occur? What other
reasons..?


Thanks.


Ido Mashall


Fax: +972-4-6376666, Tel: +972-77-2127172, 

Mobile +972-52-5901114,  http://www.beyond-materials.com/index-en.htm

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