Electronics Forum | Tue Jul 16 21:28:41 EDT 2002 | davef
Questions are: * What is this green material? * What does the green material look like? * What the impact of this material on the long-term reliability of your customer�s product? * What flux did you use to solder these boards? * How were the boards
Electronics Forum | Thu Jul 18 09:55:05 EDT 2002 | gdstanton
Mike, When we measure solder inspection yield by dividing the number of defective joints on a CCA by the total number of joints on the PWB. A defective joint is classified only once. That is we don't count multiple defects on the same joint. Our
Electronics Forum | Thu Jul 18 15:20:17 EDT 2002 | dragonslayr
I suggest following the standards developed by IPC for DPMO (go to IPC. org for more info) Create your own benchmark, within your own environment, for the specific PCA, then do trend analysis, 6 sigma improvements, etc. For a rule of thumb benchmark
Electronics Forum | Wed Jul 17 12:43:52 EDT 2002 | SMTA Director of Publications Jesse Katzman
I am helping Mark Kastner of Everbrite, Inc. identify one company logo. His contact information is furthest below. Two images are currently available on... www.sfoproductions.com/images/images.html ...under the "Miscellaneous" heading from the last
Electronics Forum | Thu Jul 18 21:04:06 EDT 2002 | davef
So, why can't you clean misprints on Entek boards? Entek: Cheap, flat, OK shelf life, not without process and fabrication issues. Your Entek organic solderability protection is probably Entek Plus [CU106A] made by Ethone OMI. Consider getting a co
Electronics Forum | Thu Jul 18 11:31:03 EDT 2002 | Mark S.
>But since we are a low volume high mix operation I need to account for almost every part used. I'm in the same boat, and we do more changing of feeders than actual placements it seems. What I have done which has improved things a lot is in our MRP
Electronics Forum | Mon Jul 22 18:00:49 EDT 2002 | davef
It doesn't appear to be a proprietary mix. Maybe it's 'neither Alpha Metals nor Kester WILL [want to] supply it.' It's interesting. A lot of the discussion of a solder replacement for 63/37 has centered on high temperature alloys. In real life,
Electronics Forum | Wed Jul 24 04:23:42 EDT 2002 | harisfaisal
Juan, I believe in term of height vs volume, volume is much better control. By the way we used Cyber Sentry 2000 which allows us to measure volume, height and area. My plant normal practice is measuring the height. Last time I did the control limit
Electronics Forum | Wed Jul 24 22:45:54 EDT 2002 | davef
WS609 is a wonderful paste. J-STD-001, 4.2 states words to the effect that for Class 3 products Type H or M fluxes should only be used for tinning operatins. Most water soluable fluxes are either H or M. I believe that you can use Type H or M flux
Electronics Forum | Thu Jul 25 03:01:25 EDT 2002 | martz
We experience e-test failure due to BGA problem. The product was subjected to 40 deg.C hot air blowing on the BGA area and it works pretty well. The product then failed when the temperature became 36 deg. C as the hot air blower is withdrawn. If it