Electronics Forum | Tue Mar 31 22:10:43 EDT 2009 | davef
5min) PASS IST Testing (500 cycles) PASS Core Level Hi-Pot Testing PASS (100V/sec; 500Vmax) Finished Circuit Level Hi-Pot PASS (100V/sec; 500Vmax)
Electronics Forum | Wed Aug 18 08:58:49 EDT 2004 | M.Enright
We are finding cracked capacitors at both first pass and second pass.
Electronics Forum | Wed Aug 03 08:15:57 EDT 2005 | ajaydoshi
We do pass board on mesh instead of chain for first side. For second side pass on chain.
Electronics Forum | Fri Nov 24 09:15:30 EST 2006 | davef
Julie: What is the benefit of your SQE requiring that your CE meet your first pass yield targets?
Electronics Forum | Thu Dec 20 12:48:03 EST 2007 | arun2382
Thanks for all your comments....my question is answered!
Electronics Forum | Thu Feb 21 18:43:35 EST 2019 | dekhead
Are you saying that it works in print mode and not in pass thru mode? Or that is won't pass boards downline regardless?
Electronics Forum | Thu Nov 23 09:41:36 EST 2006 | Jon
The DPMO is a far better measure - first pass yield doesn't give you any indication on quality or effectiveness of test step. If you want 100% first pass yield, test nothing - works every time - you see where I am coming from..........
Electronics Forum | Wed Dec 19 16:53:41 EST 2007 | flipit
Double pass printing for solder paste is not needed and will cause defects. Redesign your stencil thickness or aperture sizes, change your paste mesh size or type, go to 45 degree blades.
Electronics Forum | Fri Aug 31 11:27:53 EDT 2012 | markhoch
We actually use a turnstyle that you'd see in a subway terminal, connected to an ESD Tester. All operators must pass through this turnstyle everytime they step out onto the production floor. If they don't pass the ESD Test, the turnstyle will not all
Electronics Forum | Sat Nov 06 14:58:45 EST 1999 | Gary Moravchik
Assuming you are using Sn63/Pb37 solder paste, have you tried using a lower temp melting point solder paste for the second pass? For example, use 63/37 for first pass and a Bi58 compound solder paste for the second pass. If I recall, Bi58's melting
