Electronics Forum | Fri Dec 15 08:44:17 EST 2000 | DaveJ
I need some advise from the reflow experts. In your experience in nitrogen versus air reflow, what would be the differences in profile parameters? For example, if I profiled a board in nitrogen and achieved (for a particular component) ramps rates un
Electronics Forum | Fri Dec 15 11:21:45 EST 2000 | ralph
In my experiance, I have seen no difference in profiles between nitrogen and air reflows. What I understand is that the Nitrogen blanket allows for a greater solderability to gold plated pads. I also found that when dealing with fine pitch componen
Electronics Forum | Fri Dec 15 15:59:35 EST 2000 | Hussman
Dave, It will all be about the same - changing atmospheres does not affect your heater output. You may experience some differences in the way your solder joints look (a little duller), but with some of the newer pastes out there, you can overcome i
Electronics Forum | Wed Jun 13 16:56:19 EDT 2001 | gsmguru
The only ones we've tried so far are Indium SMQ92 & AIM NC251 + one from Sinju (SP ?) that I can't remember the Part # for. They all printed fairly well. The pump seems to be a bit more forgiving than traditonal blades. The Rheo pump may mask some pa
Electronics Forum | Thu Mar 04 08:50:53 EST 1999 | Dave F
| | I need to setup an oven to run with a nitrogen atmosphere for | boards with BGA's, but our ovens do not have the optional atmosphere monitor and controller. Is there a good way to sample and control the atmosphere without the optional built-in
Electronics Forum | Sun Apr 19 13:52:45 EDT 1998 | D.Lange
| We have to mount our SMD devices 0.1 to 0.4 mm off the pcb | PCb substrate to compensate for thermal stressing in a | Space enviroment. Has any one any ideas or contacts for | dissolvable pads. this only applies to leadless components Robert, PPI
Electronics Forum | Wed Oct 31 12:37:28 EDT 2007 | jdengler
Hi aj, We recently purchased an AOI machine. While doing the first pass research to see which machines to put through a head to head competition I discovered a major improvement in the programming for newer machines. If you buy used, get one that
Electronics Forum | Tue Apr 10 09:28:54 EDT 2012 | davef
Here's information from Bob's ppm site ... ||Screen Printing||Component Placement||Reflow Soldering||Wave Soldering May ‘02||730||15020||448||18251 June ‘02||569||7103||678||3366 July ‘02||3977||2998||1227||3736 August ‘02||1430||1229||108||4314 Sep
Electronics Forum | Sat Apr 25 10:55:01 EDT 2015 | emanuel
We are using a Comet chipshooter complemented by an Emerald for more complex parts. Both are old but true workhorses, for our small batches are more than enough. There is one annoying thing with the Comet and the 2 tables method when it comes to fidu
Electronics Forum | Wed Dec 20 22:24:03 EST 2000 | Greenman
Dave: In terms of heat transfer, air is 78% nitrogen, and the remainder is mostly (20.9%) oxygen (roughly the same molecular weight as nitrogen), with a bit of argon (0.9%), CO2, hydrogen, monosodium glutamate etc. So you would expect virtually no d
