Electronics Forum | Fri Sep 02 15:21:34 EDT 2005 | pr
Do you have a cube down the hall from me? I think it's already been forgotten, but when blindsided by these requests one has to do SOMETHING! I blasted one in reflow and did a 7 second solder bath dip with another and took pictures, nobody has asked
Electronics Forum | Wed Sep 21 16:25:43 EDT 2005 | GS
IPC-7525 tells you how to make stencil apertures for BGA IPC-7095 tells you how much should be the paste volume in order to get a reliable BGA solder joint. How are your PCB finisced? (HASL, ENIG, OSP, etc?) In case of not HASL, it could be necessa
Electronics Forum | Mon Oct 24 17:56:57 EDT 2005 | Ali
Hello all: A couple of queries on matte Sn plating: My Application: 2 Reflows in subassembly reflow+ 8 Hr Steam age+ Solderability (Dip and look) for sub assembly to mother board soldering. Queries on Matte Sn: 1- Different plating vendor
Electronics Forum | Tue Nov 15 14:31:59 EST 2005 | Samir Nagheenanajar
Back in the days when I was in charge of a Paintline Dip conformal coater, I had the same issue with a non-hermetically sealed Potentiometer. We tried to use rubber boots, but the capillary/wicking action of our silicone-based heat cured coating was
Electronics Forum | Wed Nov 16 18:25:11 EST 2005 | Mike F
Check out the Unit Design web site and look at their drag soldering machines. You do not want to try to do any of this manually. How consistent are your operators when working above a 500 F solder pot? I strongly recommend you buy one of the books
Electronics Forum | Thu Dec 22 16:12:51 EST 2005 | chunks
Off the Cuff Answer: Wow, nice big ugly connector! Thought we were the only ones using these things designed during the Korean war. Actually it really depends on the customers print. If they want conformal coating, they should know exactly where
Electronics Forum | Wed May 03 11:12:08 EDT 2006 | samir
Iron huh? You sure about that? We have the ERSA Versaflows and our nozzles are made out of ST37 Tool Steel. There is an "American equivalent" to this grade but I forgot what it is. You'll have to google it like I did. Anywho, Tin or Tin-Lead sold
Electronics Forum | Mon Jun 05 14:35:17 EDT 2006 | marc
Yes.... stop checking on your process.... :) Seriously...if you cleaning the boards after I would suspect no issues. If your leaving the flux on the board (I suspect they are using quite a bit) then I would be concerned. Since the boards have al
Electronics Forum | Fri Jun 23 10:10:15 EDT 2006 | Gman
Some amount of voiding was always seen on sites where solder paste is printed. These voids are much smaller. However the site where a flip chip is flux dipped has never had problems with voiding. Macro voids (and huge ones at that)across the board s
Electronics Forum | Wed Sep 13 08:08:56 EDT 2006 | meritajs
Hi Davef and Rob, Thank Davef for your advice,we will make "dip&look" soldering test. Rob,we are tolking about companents storage time after manufacturing. Sometime we get companents which was shipment more then year ago In many cases we have problem