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Thu, 1 Sep 2005 10:39:19 -0400 |
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Are you using a direct metal line prior to acid copper ????
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Anan Zreik
Sent: Thursday, September 01, 2005 9:19 AM
To: [log in to unmask]
Subject: [TN] chocolate plating
'
Hi every body :
every so often for a long period of time we get a "chocolate copper"
residue on the surface of our boards on our electrolytic copper plating
line . This "chocolate plating" can be removed by hand , and it is not
connected to the copper below .
does anybody know this phenomena , and its cause??
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Technet Mail List provided as a service by IPC using LISTSERV 1.8e
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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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