Electronics Forum | Thu Aug 29 17:45:54 EDT 2002 | nifhail
What are other testing/process step that we should do if we where to use the old date code QFPs other than solderability and baking ? What is the plating composition normally %? lead, % tin etc. I have my policy not to accept the more than 12 mont
Electronics Forum | Fri Aug 30 04:44:31 EDT 2002 | jason
Hi Dave, Why does it become " a bear" if u leave it unsoldered ?? Does it oxidise or something ?? Question (1): Does Ag imm. PCB need to use Solder paste with AG ?? If yes, why. Question (2): Does Ag imm pcb have poorer surface finishes than HAS
Electronics Forum | Wed Sep 04 23:55:10 EDT 2002 | jersbo
aight... Ive read the SMT archives... Ive got issues,,, 25 boards WS boards with NC on them HOw do I clean them? Used Everkleen in Prewash and wash in a dishwasher , cleaned most of the NC flux off but I have residuals. especially on the fine pitch
Electronics Forum | Tue Sep 10 15:45:03 EDT 2002 | timo
Cleaning result can vary from paste vendor to vendor and even within product lines. You should check with your paste vendor for their recommendations. Your process, materials and equipment will also have a significant impact on your success. If you'
Electronics Forum | Tue Sep 10 11:37:51 EDT 2002 | melo_guy
First of all I apologize for offering you my product. If it was a "sales pitch" it would have been much different. second of all, you have no idea how to be polite dragonslayer. Your use of the word "shilling" was not respectful in any way. so my
Electronics Forum | Fri Sep 13 13:58:06 EDT 2002 | soupatech
Hey Thanks! Yep, they are pricey but I think it would be a worth while expense to safegaurd $250,000 worth of leds! I will tell the powers that be and see if I can squeeze out some cash. If I scrap one loaded board could I use it for profiling 20 to
Electronics Forum | Fri Sep 06 14:07:20 EDT 2002 | ppwlee
Thanks for all replying to my printing SPC posting. I like to expand the SPC discussion on reflow and wave soldering. I am aware of the common methods of applying periodic measurements using test vehicles though the machines to collect critical pr
Electronics Forum | Wed Sep 11 12:52:14 EDT 2002 | slthomas
We have found that using the SPC capability of the profiler's pc software helps us identify oven malfunctions sooner than we would normally find it. The ovens tend to compensate for dieing or dead blowers by cranking the heaters on for longer cycles
Electronics Forum | Wed Oct 09 08:44:05 EDT 2002 | apg
Dear colleagues. I ask you to prompt me about necessity of drawing pastes through a stensil at the soldering micro BGA with step between leeds 1 mm and 0,8 mm or uses only a flux for this purpose. And what most suitable paste for the soldering of su
Electronics Forum | Tue Sep 17 12:32:36 EDT 2002 | ksfacinelli
I have an assembly that requires hand solder a part that is in very close proximity to a plastic housed PCI connector. I am using a Metcal iron and am interested if anyone has developed a shroud that will allow soldering in a tight cavity but not me
