Electronics Forum | Tue Feb 19 08:49:34 EST 2008 | rgduval
Get the ionic specs from your flux manufacturer, and show it to the designer. No-clean flux/solder is supposed to be low to minimal in ionic contamination, which allow the whole no-clean thing. If he needs further proof, you can have the board io
Electronics Forum | Tue Feb 19 09:26:54 EST 2008 | jdengler
The low solids flux that is commonly called no-clean can affect some circuits. We are building a PCB that measures pico amps. The customer required that it be cleaned. We would rather used the low solids and eliminate a step. The customer had
Electronics Forum | Wed Mar 04 17:19:29 EST 2015 | edwardt
Looking for any reliability data on aqueous flux residue causing low Z defects, specifically any data that may illustrate life expectancy under any humidity/temp environment. How long it takes for conductive material to migrate and form low Z impedan
Electronics Forum | Mon Nov 20 10:22:18 EST 2000 | Sheng Jin
Hi: Many 75ALS573DW parts we reveived lately from one of our vender have some problem with its pin 2, an output pin of the tranciever ( probably resulting from EOS damage). Its impedance verse GND should be normally 3M ohm up. The parts we have measu
Electronics Forum | Mon Apr 07 16:42:49 EDT 2003 | jax
You will not see any reduction in quality. Some of the only reasons to hold off on converting to SMD packaging is Cost and availability. The cost normally runs about 30% more and the lead times are about 2 times as long for SMD. For that reason you w
Electronics Forum | Fri Nov 20 08:51:34 EST 2009 | Sean
Hello, This is interesting topic that I would like to share and discuss with you.. I came across few projects from various SMT factories where its product(Computer) reach field, experience No Post/boot defect. This problem become very obvious when
Electronics Forum | Thu Nov 11 18:28:10 EST 1999 | John Thorup
Hi Jeff Actually it's not necessarily Signal to Noise Ratio or even RF circuitry. All no cleans leave behind residue by description. This residue can affect RF or other high frequency circuits in a number of different ways including SNR. Very high
Electronics Forum | Wed Aug 23 10:04:24 EDT 2006 | blnorman
We have seen leakage currents around parts that have high impedance. Evidently with a small amount of moisture, weak organic acids present in the flux residue can cause a low leakage.
Electronics Forum | Tue Jun 20 10:26:07 EDT 2006 | samir
Chunks, I used to work in power electronics, and we had this design engineer who used to "blow moisture" on the high-impedance circuit and test for cleanliness. We were water washing in a OA-Water Soluble environment. He was convinced that there w
Electronics Forum | Thu Jul 13 22:20:38 EDT 2000 | Dave F
=10 mils larger than lead 3 silk screen legend text weight >=10 mils 4 pads >=15 mils larger than finished hole sizes 5 place through hole components on 50 mil grid 6 no silk screen legend text over vias (if vias not solder masked) or holes 7 so
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