Hi Linda, 'Black Pad,' by definition is unique to ENIG. However, there has been some sloppy usage to brittle interfacial failures in general. Brittle interfacial separations are possible for almost any surface treatment, but they are not 'black pad' which is a high concentration of nickel-phosphide at the interface of the Ni-deposit and the SnNi-IMC, which weakens this interface. Werner -----Original Message----- From: Linda Langley <[log in to unmask]> To: [log in to unmask] Sent: Fri, Sep 18, 2009 6:12 am Subject: [TN] Black Pad I know we have had this subject many times before so I did go to the archives and still can't find an answer. My question, is Black Pad only associated with ENIG? Is it possible with immersion Tin? Linda Langley CIT Training Specialist Jabil Circuit 248-292-6176 --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------