Electronics Forum | Fri Jan 23 10:39:35 EST 2004 | patrickbruneel
Kris, I assume with voids you mean acceptable solder coverage of pad and lead. As Dave mentioned I also have not seen any specific studies on voids, but workman ship standards exist about acceptable coverage of pad and lead (both consumer and MIL)
Electronics Forum | Fri Feb 13 11:46:23 EST 2004 | Jack
Is your customer trying to reduce voiding? If the device is using Sn90 / Pb10 and the paste is Sn63/Pb37 the board will melt first. However, if both solders are 183C eutectic, it's a tossup? PCB design, copper weight, bga type (pbga, micro bga, Tbg
Electronics Forum | Fri Jun 04 17:15:22 EDT 2004 | drlou
I also need help with the following Questions: 1. What is estimated yearly external service/support costs? 2. What kind of internal expertise do we need for in-house operation and maintenance? 3. How many operators are typically needed for one pnp m
Electronics Forum | Tue Nov 02 05:00:28 EST 2004 | jysam
we are using solder paste WS609 and OM5100.Relow oven: forced convection type. For WS609 and OM5100, straight ramp up profile is suitable for low to medium thermal mass assemblies and preheating may be required for high thermal mass assemblies. How
Electronics Forum | Tue Jan 31 15:40:44 EST 2006 | mgdrouin1
Comp is relay. I've pulled the spec. Max 240. Using Leister h/g with manual temp settings from 1-6 (20 - 600C)set by the operator. Gun was set to setting 4. They are using the heat gun to reflow the solder after SMT but before wave. High fai
Electronics Forum | Thu Oct 30 14:07:29 EDT 2008 | jdumont
We use a normal off the shelf (Best Buy) mini fridge. As far as the temp readings, I got some USB dataloggers from Omega and stick them in there. Download the data to your PC every couple of weeks (Outlook reminder). I also use these for our Nitrogen
Electronics Forum | Thu Oct 30 14:26:20 EDT 2008 | davem
80 degrees F in the Summer. Also, "It is not recommended to store foods which must be kept at below 40� F for safe storage". Obviously we're not storing food, but the point is still valid. jdumont, Thanks for the data. I have a couple of Extech di
Electronics Forum | Mon Dec 22 14:15:41 EST 2008 | ck_the_flip
As Emil says, it's 100% the glue! Your paste is not designed to hold parts on at wave solder. Reflow is MUCH hotter than glue, so I doubt you're not adequately heat-curing it. Possibly, the glue cure is "too hot" and maybe making the material brit
Electronics Forum | Mon Aug 24 03:59:26 EDT 2009 | hurr
Hallo Joanne, I had employed by producer of Ecofrec 303. We make many tests of corrosion and conductive test in our company. All results of this tests was OK . Vast majority correspond mil standarts. When I ask my labor assistent in BRY, white residu
Electronics Forum | Thu Mar 25 12:24:12 EDT 2010 | ssager
When testing components on a PCBA, try to validate coverage for presence, correct, orientation, live, and alignment. AOI is not really great at catching cold solder joints and damaged components, and from my experience an X-Ray is only as good as the
