Trevor, I hit send before explaining a little more. The solderquik preforms are ordered in the array, pitch, ball count, alloy, etc desired. You wick the pads clean, apply tacky flux, insert preform in the alignment jig, insert "prepped" BGA on top of the preform in the jig and reflow. I usually ran 'em through an oven with a pretty standard profile. You then water down the paper that was holding all the ballsin place, let sit, and pull off the paper. The alignment jig costs around $30 or so and the preforms hover around $10. In previous lives, I've reduced scrap materials and costs boatloads! (I even worked at a company that threw BGA's away after removal.....) It's the cheapest and most efficient system I've used. Man, do I miss those mfg. eng. days!! Jason Gregory Software Specialist - NPI Group SCI Systems/Plant 2 13000 S. Memorial Pkwy. Huntsville, AL. 35803 (256) 882-4107 x3728 [log in to unmask] >>> [log in to unmask] 02/07/01 02:04PM >>> Hi everyone Does anyone know about reballing BGAs, in regards to reliability. Is the possible cost savings worth the risk. Thanks in advance Trevor Goddard, SMT Supervisor XLTEK (905) 829-5300 x 348 [log in to unmask] <mailto:[log in to unmask]> --------------------------------------------------------------------------------- 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 the following message: SET Technet NOMAIL 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 the following message: SET Technet NOMAIL 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 ---------------------------------------------------------------------------------