Electronics Forum | Wed Oct 03 21:28:38 EDT 2001 | davef
A firm grasp on the sublime. Mike points-out a good reason to describe Claude's problem as "open connections" or "open solder connections"? [Ahhh geez, wut a spoil spurt]
Electronics Forum | Thu Oct 04 12:48:09 EDT 2001 | vance
Overwetting is also a root cause of open joints. I recommend eating 5 saltines in 1 minute for anyone experiencing overwetting.
Electronics Forum | Thu Oct 04 13:04:52 EDT 2001 | Hussman
Without seeing your X-ray, it sounds like your BGAs are out gassing. This casues the situation you described. Try baking some BGAs and run them along with ones not baked to see.
Electronics Forum | Fri Oct 05 07:31:29 EDT 2001 | furrer
When tenting vias almost a few vias are not covered completly by Solder Mask. Does this one side open vias affect the Immersion Tin Process ? Do we get chemical residues in the vias ?
Electronics Forum | Fri Oct 05 09:15:23 EDT 2001 | Ben Bierlein
It is a PCB material that has a woven glass / epoxy internal core and glass veil surface. It is in between the paper materials (FR1,FR2 and CEM1) and FR-4 as far as strength and cost. It is available in HiCTI material for high power applications.
Electronics Forum | Sat Oct 06 08:42:21 EDT 2001 | davef
Please give us additional background on your board, solder, process, etc. If you are talking about black pad in ENIG solderability preservative, check the fine SMTnet archives to get started.
Electronics Forum | Sun Oct 07 07:58:32 EDT 2001 | davef
Consider searching the fine SMTnet Archives for the names of companies that offer such training courses and giving them a call to determine their schedules.
Electronics Forum | Mon Oct 08 17:01:19 EDT 2001 | upinder
Hi All. Need some immidiate help. I need to know any / all basic info regarding Teflon PCBs. Any special requirements for assembly on SMT and thru-hole lines, like profiles, placemnt , wave etc. Will there be some basic / big differences in comparis
Electronics Forum | Mon Oct 08 20:50:37 EDT 2001 | ksfacinelli
What material are you using? There are a great deal of different Teflons (in the family of Teflons) material....is it from Gore or Rodgers???? Does it have aluminum backing?? More information necessary, Kevin
Electronics Forum | Mon Oct 08 22:25:19 EDT 2001 | caldon
See PeteC under the recent forum entry on "Reflow Ovens"....Pete is a true wealth of knowledge. I will try to post his info at a later date. Cal Manncorp
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