Electronics Forum | Mon Feb 14 12:07:47 EST 2000 | Dave F
Leslie: Product screens and tests of prototypes and test vehicles should be tailored for the specific goal and product. I caution your use of equations and test condition information without specific use environments and design conditions. Lawyer:
Electronics Forum | Tue May 21 17:25:28 EDT 2002 | Carol Stirling
Hi Dave F, Thanks for the reply, the question was Customer driven. Could you clarify your recommendations for heat sealed moisture barrier bags please - does this include Nitrogen vac pack? Our production runs are small, so there is an investigat
Electronics Forum | Wed May 08 11:07:54 EDT 2002 | Carol Stirling
We have a concern with moisture absorbtion/humidity effects on PWBs specifically used for automated SMT (including BGA). I'm sure there is a IPC spec on this and would appreciate the number - I've searched the IPC web-site -no results. Could you t
Electronics Forum | Mon May 27 18:25:03 EDT 2002 | Carol Stirling
Thanks for the information Reworkman, We are leaning to the theory of better safe than sorry. I think I'd supply the bags and dessicant just to eliminate manufacturing issues. What temps & times do you ask your boardhouse to bake to? Ours said some
Electronics Forum | Thu May 07 20:28:35 EDT 2009 | davef
From our notes, the following is a series of snips from: "Copper Dissolution in Tin" LJ Turbini, PhD, adjunct faculty member, University of Toronto, Materials Science and Engineering, SMT 2/07 As the solder becomes molten, copper from the board diff
Electronics Forum | Thu Jan 05 22:22:12 EST 2006 | davef
Singulation is the process of die punching circuit boards. Manufacturers of singulation machines include: * Circuit Technology Systems, West Chicago, IL, 630-293-9470, http://www.coxautomation.com * Pioneer-Dietecs Corp., Weymouth, MA, 781-682-7900
Electronics Forum | Tue Mar 27 06:27:41 EDT 2018 | cyber_wolf
Occasionally when circuit boards are manufactured, there may be issues with solder mask coverage. It is not uncommon to re-run back through this process to fix missing or thin areas. This can causes the traces to become higher which in turn raises th
Electronics Forum | Tue Apr 27 09:31:45 EDT 1999 | Robert L. McCallum
On circuit board assemblies first pass yields need to be above 98%, if a supplier is below this level it is a indication that: he has poor control of the manufacturing process; Poor component selection (price over quality; excepted a poor design from
Electronics Forum | Sun May 28 23:43:35 EDT 2017 | claire_08
Hi. We provide rework and repair of printed circuit boards to companies all over the world. Key services: BGA Rework Services. BGA Reballing Services. BGA X-Ray Services, Consulting Services. Advanced Technologies R & D Support Services. Hand Sol
Electronics Forum | Sat Mar 20 08:54:28 EST 2004 | Primus
As I said, I'm new, and I've never seen the adhesive dot method. I'm certian our company will stick with paste, though, because we make our own boards (with a vertical plater no less!!!) and contamination is quite an issue. We do a fair amount of rew
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