Scott
Thanks for your replay,
We tryied another copper tank and it start getting cracks after 3 more
days.
We did not changed base materials and curing cycles on the previuos months.
Thermal stress cycle is the solder test 10 sec at 288C
Try these for the pictures
http://tinyurl.com/4ervrz
http://tinyurl.com/44gv5t
http://tinyurl.com/44f3wv
Ido Mashall
Fax: +972-4-6376666, Tel: +972-77-2127172,
Mobile +972-52-5901114, http://www.beyond-materials.com/index-en.htm
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Scott Westheimer
Sent: Friday, October 03, 2008 11:53 PM
To: [log in to unmask]
Subject: Re: [TN] Barrel and Corner cracks in copper elctroplating
Ido,
Normally corner cracks are caused by high organic contamination in the
plating bath. I image that you have more than one copper tank and do you see
it occurring on parts processed through other baths? Is your material fully
cured? What is your thermal stress cycle? I was unable to view your
pictures. Scott B. Westheimer5709 Clarks Fork DriveRaleigh, NC
[log in to unmask]: (919)713-0748Cell NC: (919)961-5364 >
Date: Fri, 3 Oct 2008 21:12:43 +0300> From: [log in to unmask]> Subject: [TN]
Barrel and Corner cracks in copper elctroplating> To: [log in to unmask]> > >
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-d3497-
> 1.jpg> >
http://www.drivehq.com/file/df.aspx/shareID4765976/fileID233954135/es-c9633-
> 1.jpg> >
http://www.drivehq.com/file/df.aspx/shareID4765976/fileID233954138/as-d3715.
> 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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