Electronics Forum | Thu Jul 15 06:27:50 EDT 2010 | xps
Hi after an enviromental test 85C/85RH, for 3 months (powered), of an electronic assembly with edge finger tabs ENIG finished (nickel 5micron, gold 0.02micron), the nickel disappears completely under the gold (due to corrosion, I think). Does anyone
Electronics Forum | Thu Jul 15 11:17:03 EDT 2010 | davef
Things don't disappear completely. If something caused nickel corrosion, the nickel corrosion by-product would be in place of the nickel. Is it possible that ... There never was any nickel? We know that the nickel will diffuse into the copper. Th
Electronics Forum | Thu Jul 15 13:27:42 EDT 2010 | xps
Thanks... anyway I confirm, the nickel disappear (verified by cross section)and a strange substance greyish above gold, covering the tabs after test. I don't know the reason for this phenomenon. I don't believe that with proper electrolytic nickel fi
Electronics Forum | Fri Jul 16 08:14:15 EDT 2010 | vetteboy86
We're expereincing issues in our pick and place machine due to what I consider a server warping of the PCB. The PCB is received this way from our PCB manufacturer. Before I push to much, I would like to know options for a cause. The warp is so bad,
Electronics Forum | Wed Jul 21 12:19:01 EDT 2010 | mb_mfg
To eliminate warping during processing, we have provided customers with composite fixtures to support the board on all 4 edges, with retractable pull down claps that can be added to the top of the PCB after the screen printing. Simply by pushing the
Electronics Forum | Tue Jul 20 21:50:46 EDT 2010 | dman97
Does anyone know the correct way to measure the pitch of the cavities between the rows and columns of waffle trays? Everytime that we measure using a caliper, it is always off. Is there a formula to use to determine the exact center of the cavities?
Electronics Forum | Wed Jul 21 06:10:33 EDT 2010 | cyber_wolf
Of course the best way is to get a dimensioned tray drawing if possible. The next best way is measure point to point over as many cavities as you can open your calipers up to. Divide the measurement by the number of pockets you spanned. This reduces
Electronics Forum | Mon Jul 26 05:38:15 EDT 2010 | chrislyttle
Could anyone recommend somewhere i could order a new AIPH4090 2.5mm nozzle for a Fuji IP2? I tried Fuji but they tell me that its no longer available from them and they have no alternative. I also might need to order extra feeders along with it.
Electronics Forum | Wed Jul 28 04:53:59 EDT 2010 | grld_fischer
Hey Dave, Thank you so much for the information. One of my friends suggested me that we have free DFM software’s offered by few PCB manufacturers which enables the designers to check their PCB design during the initial design process, preventing des
Electronics Forum | Tue Jul 27 06:34:14 EDT 2010 | bwet
Recently we have been placing and reworking quite a few Linear LGA DC converter modules. These are LGA packages with integrated passive components which become easily disturbed in reflow. Even with perfect bumping techniques on the LGA using the poly
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