Electronics Forum | Tue Jun 19 21:44:20 EDT 2007 | rfrog
The first thing that I would do is contact the smock manufacturer and ask them for advice on testing the smocks. ESD FROM A TO Z 2nd ed. (Kolyer) states that: smocks should have a resistivity of less than 10^12/sq and must not shed steel fibers.
Electronics Forum | Tue Jul 10 11:49:20 EDT 2007 | samir
Parallelism tends to drift: �h After preventative maintenance �h From dross buildup or other obstruction clogging either wave Parallelism should at least be studied during the process characterization stage, so that you know your machine's process
Electronics Forum | Mon Jul 16 16:39:17 EDT 2007 | davef
We doubt that entrapped process chemicals cause under-etch. Over-etch maybe, but not under-etch Under-etch is an indicator of improper process control/improper chemistry during etching. Under-etch can result in bridging between traces, resulting in
Electronics Forum | Mon Jul 16 15:44:27 EDT 2007 | davef
J-STD-001 doesn't necessarily require additional controls under conditions of low humidity, only that you verify the effectiveness of what you have in place. ESD S20.20 [1999] only says that relative humidity above 30% is "desirable". ESD S20.20 [200
Electronics Forum | Sat Jul 28 08:37:52 EDT 2007 | davef
There is no good choice. Board Finishes: Industrial/Battelle Class 3 Environment [Reliability Knowledge Gaps: For use of Pb-free solders in High Reliability Applications, J Smetana, iNEMI Availability of SnPb-Compatible BGAs Workshop, March 1, 2007,
Electronics Forum | Wed Aug 08 17:05:01 EDT 2007 | klaughton
I have instituted a policy that probably seems a little extreme to some, but is worth the cost in my eyes. Once a jar of solder paste is opened, it must be thrown away at the end of the work day (Properly discarded, of course). We use the small 250
Electronics Forum | Thu Sep 06 22:01:21 EDT 2007 | syedsmt
Hi! I am Syed from Hitachi located in Malaysia.It seems that the discussion about OSP is very much related to the dillema that I am facing in my company.I am the Senior Executive for the SMT Department at Hitachi.Currently we are facing some issues w
Electronics Forum | Wed Nov 07 17:57:01 EST 2007 | jmelson
OH! He he, St. Louis! I have recently acquired a very good P&P machine, and am in the St. Louis area. I got the machine primarily for my own manufacturing, but there is plenty of time available on the machine. If you'd like to see how the process
Electronics Forum | Mon Nov 12 09:22:41 EST 2007 | devajj
BTW, The surrounded QFN fine pitch terminals > should have the normal aperture reduction of 7 % > in case of RoHS Senju solder paste. This works > for our Telecom customer. > > The vias in the > ground pad will be somewhat filled with solder >
Electronics Forum | Sat Jan 19 23:23:45 EST 2008 | bentigano
I'm not familiar with SPC Plus. I'll assume it's a "statical process control" system. We use the SPC data collected by our YesTech AOI system, together with a custom, web-based reporting system for process analysis and defect reporting. I am actually
