Electronics Forum | Fri Aug 29 07:55:29 EDT 2008 | realchunks
I agree with Pat. We specify matte finish on all our boards. Once in a while our QC Dept lets in some glossy finishes in and then do their victory dance at the wave chanting "Wut ya gunna do about!?! Wut ya gunna do? Process outta control! Giggi
Electronics Forum | Tue Sep 02 14:59:41 EDT 2008 | hermes
if two boards with different solder masks give different results on flux residue level after soldering with the exact same machine settings than it is clear that one of the solder masks is not compatible with your no-clean flux. could be the solder m
Electronics Forum | Wed Aug 27 18:28:29 EDT 2008 | blnorman
We have an immersion silver board that has a brown discoloration after processing. It's not flux residue, that normally doesn't cause this condition. Elemental analysis shows less than 1% sulfur, and I thought silver sulfide is more a black color.
Electronics Forum | Tue Sep 02 16:07:04 EDT 2008 | blnorman
Colorization is relatively uniform across the board. "Processing" is first pass reflow. I belive MacDermid is the ImmAg supplier. Plating thickness has not been determined, our XRF is being revitalized. Elemental analysis did show a large copper
Electronics Forum | Tue Sep 02 22:08:34 EDT 2008 | davef
MacDermid Sterling seems to take-on a brownish tint in high dew points. Look at figure 3, p14 here: http://www.enthone.com/docs/CircuiTreeNov2006ImAgStudy.pdf We not so sure that it's fatal. That you see Cu makes us nervous. Since your XRF is doin
Electronics Forum | Wed Aug 27 22:48:59 EDT 2008 | davef
Try: * SMT Plus; 14178 Pepperwood Dr, Penn Valley, CA 95946; 530.432.3806 F530.432.8746 http://www.smtplus.com sales@smtplus.com * STM Service To Mankind; Training Center, 4065 Clipper Ct, Fremont, CA 94538; 408-274-7119 http://www.stmtraining.com i
Electronics Forum | Wed Sep 17 18:12:39 EDT 2008 | dnebel
I have an excess TR1000 available. Bought it from Cencorp for a project 8 years ago and we changed the boards to break outs soon after. Engineering kept it around, thinking it was nice to have "just in case". It was in perfect condition 8yrs ago.
Electronics Forum | Tue Sep 02 10:04:24 EDT 2008 | cyber_wolf
Good luck with that one. We just had a hard drive crash in one of our TRS ovens. We had to upgrade to wincon software which = 1500.00 and then we had to pay a 450.00 service fee so they would talk to us. BTW...the $450.00 service fee only gets you 1
Electronics Forum | Tue Sep 02 22:03:03 EDT 2008 | davef
Try: * IPC-7530, Guidelines for Temperature Profiling for Mass Soldering (Reflow and Wave) http://portal.ipc.org/Purchase/ProductDetail.aspx?Product_code=3f5288fc-b386-db11-a4eb-005056875b22 * http://www.smtinfo.net/Db/_Reflow%20Soldering.html
Electronics Forum | Tue Sep 09 16:00:07 EDT 2008 | ppcbs
We always bake our loaded boards before any BGA rework is done. 12 to 16 hours at 100 c. We have had incidents in the past on loaded boards where 125 c has melted parts and the occasional low temp BGA trays. 100 c has proven safe for the past 10 y
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