Electronics Forum | Fri Sep 01 22:44:47 EDT 2006 | dmfausti
I have just been engaged again in SMT pick-n-place machines. My latest exposure is with Yamaha YV100 and YM84. I have been having some problem on feeders, especially on 1206 reel packages and above. The plastic cover on the reel does not peel off eas
Electronics Forum | Mon Sep 11 08:52:12 EDT 2006 | Amol Kane
lead-free processes involve higher temperatures. if you run this PCB thru the reflow oven, the worst possible scenario is that the board may melt and deform. even if it doesnt, it may delam internally (and or the bare board reliability might be compr
Electronics Forum | Wed Sep 03 16:59:13 EDT 2008 | glennster
At a former employer we required HASL thicknes to be a minimum of 0.75 micron (30 microinches), as measured at the thinnest point on any given pad. This would generally assure a minimum 1 year solderability shelf life. Usually when we saw a soldera
Electronics Forum | Fri Apr 02 12:41:12 EDT 2010 | CL
Nicolas, 4.1.2.1 and 4.1.2.2 mention the requirements for drying an MSD to resett the clock life. 4.1.2.2 states that once a component is dried, refer to 5.3 for safe storage. Under that specification is 5.3.3.2 DRY Cabinet at 5% RH- This states tha
Electronics Forum | Thu Sep 30 01:13:58 EDT 2010 | Shean Dalton
Likely, but if your dross production is mostly due to pumping a high wave, or, due to a system that is configured to produce a lot of dross from the solder wave return to the pot, pump shaft interface or an aggressive chip wave, then maybe wax will n
Electronics Forum | Sun Jun 22 13:24:49 EDT 2014 | davef
I don't know. We never had craziness like this before lead-free. You should have the yellowish-metal analyzed to be sure. Guessing: You're seeing this color on the terminations of components, not on the bulk of the SnX solder connection. If that's
Electronics Forum | Mon Feb 09 09:00:17 EST 2015 | jax
Outside the MSD issues stated already (and I cannot provide a exact time not knowing multiple factors like Humidity levels, temps, exposure times, etc...) OSP might be the very worst finish to use in this scenario of side 1 / store on a shelf / side
Electronics Forum | Fri Nov 03 15:43:20 EDT 2017 | dleeper
IPA and DI water are both very common and effective methods of cleaning PCBAs. http://www.zestron.com/sa/cleaning-applications/smt-electronic-cleaning/pcba-cleaning/aqueous-cleaning.html http://blog.gotopac.com/2010/11/18/ipa-as-a-universal-cleaner
Electronics Forum | Sat Apr 15 00:10:52 EDT 2023 | sarason
Having worked in a hybrid maanufacturing operation many years ago, yes stencils are great and have the required accuracy, but on the down side there were 2 operators that were absolute wizzes at turning them out and that could mean up to 20 stencil
Electronics Forum | Tue Dec 05 15:10:55 EST 2000 | Francois Monette
Victor, here are a few more elements of information to answer your question. Both the temperature and relative humidity on the manufacturing floor have a significant impact relative to the rate of diffusion of moisture inside a plastic package and t
