Electronics Forum | Sun Mar 04 09:53:00 EST 2012 | eadthem
What i have on the original 2 problem boards is the parts next to it are SOIC8 and placed using a 125F(.125" dia) 1 of witch is close and we have to Z zone it to place the SOIC last, the others have more than .02" clearance on all sides. The other
Electronics Forum | Fri Apr 16 12:47:48 EDT 2010 | boardhouse
White solder mask does have a tendency to yellow within the lead free environment. so double coating will not help any. I due believe the flux is a factor in the yellowing but due to the color is the main reason. Find out what brand of S/M mask they
Electronics Forum | Tue Aug 22 16:02:07 EDT 2000 | Dr. Ning-Cheng Lee
If the thermal mass of the products is small, a tent-shaped profile is recommended, with peak temperature around 240C. The hottest spot on board should be less than 250C. However, if the thermal mass of the product is large, such as a large server PC
Electronics Forum | Thu Sep 19 04:21:11 EDT 2013 | spoiltforchoice
The budget is very small, if there is genuinely a saving to be had by moving this work in-house and away from subcontracting you should really be able to justify spending more. If you can't increase the budget maybe try shopping around for more compe
Electronics Forum | Tue Jun 03 22:51:51 EDT 2008 | davef
Your circuit would consist of: * White noise generator * ~30Khz bandpass filter * Amplifier * Power supply You can find modules for these functions on the web. Good luck.
Electronics Forum | Thu Aug 05 17:32:31 EDT 2021 | cyber_wolf
Including non-spring tools ? Additionally I assume you know how to use the tool install utility and have looked for things like cracks in the big ribbon cables on the X ? Tools are not dry and have white grease on them etc ? There is a show force
Electronics Forum | Sun Aug 23 11:42:01 EDT 2009 | ysutariya
Hi Dave, I haven't tried the Probimer yet, but the Taiyo ink didn't hold up too well. As a PCB fabricator, finding a white soldermask that has good trace coverage and survives 4X solder immersion (HASL) is like the holy grail of white soldermask.
Electronics Forum | Thu Apr 22 20:26:39 EDT 1999 | Dave F
| | On various PCB's after building processes,such as reflow, flowsolder and wash. The soldermask on the PCB's have become discoloured, like a 'marble' effect all along the solder side of the board, it is lighter in contrast than normal, although whe
Electronics Forum | Thu Jan 28 14:10:57 EST 1999 | Tom B
Hello Netters, I need some info, Earl or Dave, I have a PCB that exhibits a white layer on solder side. It does not appear to be surface residues (IPA has no effect), but looks like its under solder mask. My first guess is that the LPI solder mask
Electronics Forum | Thu Jan 28 15:43:16 EST 1999 | Dave F
| Hello Netters, | | I need some info, Earl or Dave, I have a PCB that exhibits a white layer on solder side. It does not appear to be surface residues (IPA has no effect), but looks like its under solder mask. My first guess is that the LPI solde
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