Electronics Forum | Tue Oct 16 18:42:32 EDT 2001 | mparker
I go with DaveF's advice. You are probably curing the glue too fast. Another phenomenon that I have experienced was during glue cure and solder paste reflow simultaeously. A good reason to run a glue cure profile seperately from solder paste reflow
Electronics Forum | Thu Dec 20 12:27:25 EST 2001 | seand
Hello Gentlemen, Dave has a good point. Proposing to move the rails for the sake of thermal integrity doesn't seem logical to address you issue. By adding a rail set you have simply added mass (almost like big heat sinks) throughout the oven vs. w
Electronics Forum | Tue Apr 23 15:53:52 EDT 2002 | HAN PHAN
I'm researching the history of SMT. In particular, I'd like to get some general information on MILESTONE events like: FIRST IC COMPANY TO RELEASE IT, BOTH TO DEFENSE INDUSTRY & TO THE MASS MARKET. WHEN? WHICH COMPANIES & MARKETS (TELECOM, COMPUTE
Electronics Forum | Tue May 14 08:04:58 EDT 2002 | robbied
Hi. Does anyone out there know of a way to calculate the surface area of populated PCB's? We build many different types, and until now have been using a water displacement method, which I believe to be fundamentally flawed. Our technique is to drop a
Electronics Forum | Thu May 23 11:23:47 EDT 2002 | yngwie
Hi guys... Has anybody hv an experience with using a common or standard profile to reflow high mix brd ( say, low, medium and high )?. The reason for asking is that, we are running high mix low volume, and materials that were consigned is exactly as
Electronics Forum | Wed Jul 03 10:34:35 EDT 2002 | davef
Suggestions are: * Convince yourself that your paste printing and paste control processes are in control. * Convince yourself you oven is in-control and capable. * Get one of those FREE software packages from the profiler companies [ie, KIC, ECD, etc
Electronics Forum | Mon Jul 29 08:28:05 EDT 2002 | pjc
Start killing DEK now, on the ELA. All DEK 248 semi-auto printers have been built in China for quite some time (years). Its shipped to the UK from China. All DEK ELA models are now built in China, since 01 some time. Thats the fact Jack. All MPM mod
Electronics Forum | Tue Oct 15 10:12:44 EDT 2002 | davef
1) Do people always bake, sometimes or never? Does this depend on whether MS sensitive components are near the rework site? If a BGA is to be removed and reballed, baking is a no-brainer. Sometimes, based on the proximity of the MS components. >2)
Electronics Forum | Fri Oct 18 07:56:26 EDT 2002 | cyber_wolf
I have a question to pose for all of you. We use BTU TRS ovens for all of our SMT reflow. Anyone that has had any experience with these ovens knows that they are large and the have a lot of " thermal mass" Which means to me that they are very stable
Electronics Forum | Fri Jan 17 22:08:31 EST 2003 | iman
try using thermal pads under the area without the balls. yeah, its a pain but we did it before for lot run of 500pcs BGA. Not feasible for mass production run, you say? well, thats why there's a thing called DMF, and why its the designer guys res
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