Hi Jeff, For our eutectic PBGA's, we only flux (no clean). Have only done about 50 or so over the past year with very good (97% yield) results. Have not seen any studies or papers. Just worked closely with our CM to create the profile for each type of BGA. We use Air-Vac. Kerry -----Original Message----- From: Jeff Ferry [mailto:[log in to unmask]] Sent: Thursday, January 31, 2002 11:54 AM To: [log in to unmask] Subject: [TN] BGA Rework Using Paste vs. No Paste Fellow TechNetters, We nearly always apply solder paste to the circuit board when we replace BGA components during rework. Yet, after speaking with a handfull of BGA equipment companies at APEX, seems like they all recommend using flux only vs. paste, unless the circuit board is used in a high rel application. What do ya'all do/recommend for BAG rework? Can you point me to any studies/reports on the subject? Thanks, Jeff Ferry CEO Circuit Technology Center, Inc. ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 ---------------------------------------------------------------------------------