Electronics Forum | Tue May 20 09:34:28 EDT 2008 | roc2x
Well something is different isn't it? * Paste * > Part supplier * Board fabrication * Was the > profile that you reference the measured > temperature or the the settings keyed into the > oven? > > The cross sections seem to show less > than exp
Electronics Forum | Fri Jun 08 15:37:41 EDT 2007 | ck_the_flip
Jim: I have limited knowledge, but here's what I know: 1. Yes, it's a standard process. In today's SMTNet, it's rarely mentioned, and few people reply to postings. 2. Nope. It's a "specialty" piece of equipment for most CEM's. Depending on you
Electronics Forum | Mon Jun 09 06:37:42 EDT 2008 | roc2x
Hi, After reflow process we do Automatic inspection and after that direct to 5DX machine to check all the solder joints and we detected it at 5DX inspection. This card havent go to any testing.
Electronics Forum | Thu Mar 15 15:36:39 EST 2001 | traviss
Don�t be afraid of the more standard doubles sided mixed process. Even without a chip wave it works, don�t get me wrong it works better with the chip wave, but even without chances are you will be spending more on the additional steps than you would
Electronics Forum | Sat Mar 21 09:09:40 EDT 2009 | davef
Your puzzlement about blowholes in PTH solder connections during reflow soldering comes from: * Boards are hydroscopic. So, moisture content of the board is uniform. * Gold plating is uniform. * Nickle plating is uniform. * Copper plating on your PTH
Electronics Forum | Wed Aug 30 14:57:43 EDT 2000 | John Thorup
Hello Craig Are code dates other than these two coming apart or do they stay together? If other dates stay together you should get together with RFM. Did the process work before and and the defects just start happening? These are pictured on the RFM
Electronics Forum | Fri Feb 03 16:40:24 EST 2006 | Mike
At my last employer, we ran a number of tests to make a "Hybrid" profile work (same profile Joe lists) . It worked great for everything but BGAs. The problem (6 months ago) was using parts not rated for lead free reflow temps. As the market fills wit
Electronics Forum | Mon Sep 17 09:47:18 EDT 2012 | mbnetto
Hi, Do you want to replace the SB ou just reflow it again? Do you suspect there is some "colder solder joint" in one of the SB balls ? In my opinion you are heating the board a lot... Did you put some thermocouple on the ball to check the temperat
Electronics Forum | Wed Nov 14 12:11:04 EST 2001 | eabbott
We are experiencing many solder balls after wavesolder. Two different board suppliers of the same board are involved. My initial reaction was that it was the process but in researching information in this forum I am beginning to wonder. How can on
Electronics Forum | Tue Nov 27 12:12:53 EST 2001 | Justin
We have noticed that when you are using a no-clean flux with the wave solder process that you will have additional solderballs. One thing that we have done is to change the PCB finish to a matte finish. This has greatly reduced the number of solder
