I use Tech Spray 1631-16S to remove the HALO surrounding the BGA left behind when NC Flux has been processed. This is for destructive analysis ONLY. Perhaps the G3 series of tech Spray will work for you. Victor, -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of David Tremmel Sent: Monday, June 27, 2005 11:00 AM To: [log in to unmask] Subject: [TN] Flux residues Technetters, I have received some microBGAs which I have to reball and they have a no-clean flux residue which is difficult to remove. Also, when it comes in contact with our water-soluble flux it creates an acid which is not very 'friendly' to the part. Would any of the chemical gurus care to edify one of the uneducated ones why no-clean flux, when dried and allowed to set for a couple of months is so difficult to completely remove and what possible acids or chemicals are created when it is combined with water-soluble flux (type ORM1)? As always, I appreciate the responses I receive. David Tremmel Technical Manager BT Mexico _________________________________________________________________ ¿Cuánto vale tu auto? Tips para mantener tu carro. ¡De todo en MSN Latino Autos! http://latino.msn.com/autos/ --------------------------------------------------- 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 -----------------------------------------------------