Was this Cupric Chloride a basic composition for Copper black oxidized surface? I am just wondersing that the EDX results, Auger results we did just show traces of Carbon, Cu, oxygen and non chlorine, any ideas are welcome very much regards [log in to unmask] 03/07/2003 04:07 AM To: "TechNet E-Mail Forum." <[log in to unmask]>, Jonathan A Noquil/Cebu/FSC@Fairchild cc: Subject: Re: [TN] Black Oxide Jonathan, The predominant composition of any reduced oxide should be a mixture of copper metal, cuprous chloride, and cupric chloride, mostly cuprous. However, after some time has passed, and the circuit has gone through thermal excursions, much of this will have re-oxidized back to cupric chloride. Any organic found would be only a residual from processing. Of course, any object that has been exposed to earth's atmosphere will have carbon and oxygen adsorbed on it's surface, so the presence of C and O by Auger is probably not a significant find. Regards, Denis Morrissey Jonathan.A.Noquil @FAIRCHILDSEMI.CO M To Sent by: TechNet [log in to unmask] <[log in to unmask]> cc Subject 03/07/2003 12:10 [TN] Black Oxide AM Please respond to "TechNet E-Mail Forum." <[log in to unmask]> ; Please respond to Jonathan.A.Noquil @FAIRCHILDSEMI.CO M Hello Guys: I would like to ask you regarding my analysis. I examined a competitor package that passed MSL1 criteria. We found out that the surface of the package is black (improved EMC adhesion), and i suspect that it was black oxide. Is there any analysis method to confirm this? We did Auger analysis and found these Eleements (Carbon and Oxygen), I would like to ask if black oxidation contains carbon? --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- regards --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------