Electronics Forum | Sun Jun 30 20:00:56 EDT 2002 | redmary
the SOIC encounter solder crack after reliability test, the common process is: SMT---manual soldering---IPT(in process test)---potting---T/C(thermal cycling,only add current and voltage)---B/T and F/T (burn in and functional test). the condition is 2
Electronics Forum | Tue Oct 08 20:06:03 EDT 2002 | peterson
What is the procedure for insuring that our solder is not contanimated in our wave solder process if we switch between water soluable and no clean solder. We switch between the two types on the same machine during consecutive shifts. Should the entir
Electronics Forum | Tue Oct 22 13:11:07 EDT 2002 | slthomas
After considerable hemming and hawing, we decided to drop the bomb on 'em....give us ORL0 (which we use here) AND no bottom side solder balls or belly up to the bar with some favorable Appendix B test results on their preferred flux. As usual, Mr. F
Electronics Forum | Tue Dec 03 11:59:01 EST 2002 | slthomas
We haven't run a profile yet....probably because we're a-feared to. We can't do topside preheating here to any degree because we use an aluminum plate for aligning hundreds of top side through-hole components (pots, switches, buttons, LEDs) that te
Electronics Forum | Fri Jan 31 14:06:09 EST 2003 | MA/NY DDave
Hi Wow, I can't imagine this set up. No wonder some of us were coming from opposing directions. My thoughts would be to buy another pot if needed and not go to N2. Do you have a site that we could look at the dynamics of this N2 air knife/ solder
Electronics Forum | Mon Apr 21 09:01:38 EDT 2003 | russ
Wave solder - Initially high cost but after that it is relatively cheap. Selective soldering with a solder pot such as the Air-Vac PCBRM models - Much lower cost than wave but if you get the right nozzles it is a great process. Solder preforms - s
Electronics Forum | Wed Jun 04 09:15:06 EDT 2003 | davef
We used to use 260+-5C (500+-10F) for Sn63, now we use 240-260C (460-480 F). You probably could get away with 232C (450F) in all cases, since there is no thermal mass to a lead being tinned. We keep our tinning temperature the same as our solder po
Electronics Forum | Wed Jun 11 16:41:58 EDT 2003 | MA/NY DDave
Hi, All seem good answers and food for thought. Additions you probably know. Flux Supplier Application Notes/Data Sheet. Many of them have run experiments to tell you what works for their flux on various machines. They might even give you optio
Electronics Forum | Fri Nov 14 08:28:22 EST 2003 | caldon
Actually cleaning of PCB's may see a resurgence with the lead free movement. Higher temps and more aggresive fluxes might need to be clean depending on your board and process. In addition Wave soldering solder pots (in some cases machines) may have t
Electronics Forum | Wed Mar 10 13:13:19 EST 2004 | davef
It's [maybe], because you melt [reflow] the itty, bitty solder pellets [that were formed from a liquid solder] in the solder paste. * Wave solder is melted solder bars [that were formed from a liquid solder], also, but someone named it wave soldering
