Electronics Forum | Wed Apr 14 07:59:54 EDT 2004 | arcandspark
Makes a lot of sense, thanks for the excellent input. The peak temp I am running fo our pb free (238C and approx. 90 seconds above 183 C)is the recommended profile from T.I and also the solder paste manufacture. Not sure exactly what the melting temp
Electronics Forum | Sun Apr 18 06:49:10 EDT 2004 | Nick Prince
You might like to check ou the SSTC at the National Physical labs, in the UK. They have done a lot of research in mixing PB and PB free alloys. Its high Science stuff but intelligable. The upshot seems to be that if you mix PB and PB Free alloys th
Electronics Forum | Tue Apr 13 08:19:52 EDT 2004 | arcandspark
The PCB's we are seeing the voids on are made of some material called Thermount, not FR4. The pads are very easily pulled off if any touch up or rework is done. The voids I am seeing are (hugh) 50% to 75% of the Solder Ball volume. The last new batch
Electronics Forum | Tue Apr 13 22:57:52 EDT 2004 | Ken
"Do you at least get to look at the boards before the ship schedule and pricing is determined and the kit is on the floor? " Where I am at, the quote model is a closely guarded secret. It envolves eye of newt, liverwort and a sprinkle of pixie-dus
Electronics Forum | Mon Apr 12 13:17:46 EDT 2004 | pjc
Try the APEX trade show web site '04 exhibitors for a comprehensive list of suppliers: http://exhibitors.ipc.org/start.asp from there select "Curing Equipment/Systems" in the Catagory Search window and select sort by Company Name below that, then s
Electronics Forum | Tue Apr 13 08:25:15 EDT 2004 | arcandspark
I would have gone to a .004" stencil but again, the board designers, which we have no control over or are we allowed to give input to, have made the pads on all connectors and many other parts so small that we are almost seeing insuffecient solder us
Electronics Forum | Tue Apr 13 14:41:20 EDT 2004 | arcandspark
The problem is T.I. does not want us to use Water Soluable, only No Clean. ALso yes from your other reply we must work for the same company. We build boards and find out later sales quoted a cost that is much less than what we ended spending to build
Electronics Forum | Tue Apr 20 13:22:28 EDT 2004 | Kary Voegele
Transistion Automation makes a great squeegee blade. I have found that it is superior to the standard steel/titanium blades generally used in production. It is made from gun barrel blue steel. It is more expensive than standrd squeegee blades, but i
Electronics Forum | Thu Apr 22 11:46:20 EDT 2004 | rkevin
We used type 4 no clean from Aim too with this application. The price was only about 20 % more than type 3 powder. Works great. They didn't have a long leadtime, my paste was in stock. I have had simalar problems with Indium. They got too big too fas
Electronics Forum | Tue Apr 13 19:50:53 EDT 2004 | Dreamsniper
Thanks. That's a good Idea. But question. Can a cleaning equipment (aqeous cleaner design for low standoff height parts) be able to clean my PCB given that the PCB sat in our production floor for 1 week prior to cleaning? Will the flux stick hard ont
