This a good point especially if the component lead finish is gold with a thickness of more then 0.8 um. Regards, Dr. Gil Zilber Technologist, Elta system Ltd. Tel. +972-8-8577240 Mobile +972-54-4983222 http://www.iai.co.il/site/en/iai.asp?pi=17887 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of McGlaughlin, Jeffrey A Sent: Tuesday, November 08, 2005 8:42 PM To: [log in to unmask] Subject: Re: [TN] Grainy Solder Joints Kevin - What are the board and lead finishes? I seem to remember this as an issue when using ENIG or soft gold with Tin-Lead solder. Jeffrey McGlaughlin, CID Engineering Designer Battelle Columbus Ohio http://www.battelle.org -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Kevin Glidden Sent: Tuesday, November 08, 2005 12:59 PM To: [log in to unmask] Subject: [TN] Grainy Solder Joints We are experiencing dull / grainy TH solder joints, made by hand soldering w/ iron @ 500F. At first, it appeared to be residue on the surface, so I started chasing the cleaner. But all checked out OK. I refluxed (water soluble, ORH0) and reflowed (iron @ 600F). This improved the finished appearance, but not 100%. While eutectic, the joint is perfect. Then when I draw the iron away, it cools and the surface finish is no longer smooth or shiny. What can cause this? --------------------------------------------------- Technet Mail List provided as a 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/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 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- This message is processed by the PrivaWall Email Security Server. The information contained in this communication is proprietary to Israel Aircraft Industries Ltd. and/or third parties, may contain confidential or privileged information, and is intended only for the use of the intended addressee thereof. If you are not the intended addressee, please be aware that any use, disclosure, distribution and/or copying of this communication is strictly prohibited. If you receive this communication in error, please notify the sender immediately and delete it from your computer. Thank you. This message is processed by the PrivaWall Email Security Server. --------------------------------------------------- Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------