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October 2008

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Subject:
From:
Scott Westheimer <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Scott Westheimer <[log in to unmask]>
Date:
Fri, 3 Oct 2008 16:52:47 -0400
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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> > ---------------------------------------------------> Technet Mail List provided as a service by IPC using LISTSERV 15.0> To unsubscribe, send a message to [log in to unmask] with following text in> the BODY (NOT the subject field): SIGNOFF Technet> To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)> To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest> Search the archives of previous posts at: http://listserv.ipc.org/archives> Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815> -----------------------------------------------------
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