Electronics Forum: viewed (Page 6256 of 7929)

What is the QFN or Device Voiding Levels Needed for Automotive Industry for Power Devices for Electric Vehicles?

Electronics Forum | Thu Mar 16 19:12:22 EDT 2017 | pzappella

Hi Rob, Thanks for the LED paper. I like the void area equations but I am puzzled, the paper did not say if the solder was a solder paste that would generate a lot of voids, or a fluxless preform or sinter material. The measured voiding level

MPM Sigmaprint 400

Electronics Forum | Tue Mar 28 19:43:49 EDT 2017 | aemery

Simon, Trying to dust off my 400 knowledge here, I can picture the 500 and 1500 better in my head. I think the 400 also has a Z axis amplifier box in the back of the machine. Remove the rear lower door and pull out the big square vacuum box. If it

MSL control

Electronics Forum | Thu Mar 16 22:19:38 EDT 2017 | deanm

First, reflow does not reset the clock for MSL exposure. The best solution is to run the second side before the exposure time expires. I am curious to know why they must sit for 40 hours. If that cannot be done, then store the assemblies in a dry c

Tools For Cleaning PCB after Soldering

Electronics Forum | Thu Mar 16 01:43:15 EDT 2017 | soldertraining

Hi! I have a very basic question about PCB cleaning. Which is the best way to clean the PCB after soldering? We use a lead free solder wire (3,5% flux inside the core) and after the soldering its a visible wetting,flux around the joint. When using th

Xray Analysis of non-BGA solder joints

Electronics Forum | Thu Mar 23 02:10:59 EDT 2017 | alexeis

Hi, Based on our experience, you can collect X-Ray analysis of solder joints and calculate values of SPC (such as PP/PPK and GR&R). Now, you can find, based on this calculated values, if your production is good or not. Also, this helps you to detect

MPM ultra print 1500

Electronics Forum | Tue Mar 28 19:56:47 EDT 2017 | aemery

Dale, Be very careful about putting to much grease into this actuator. It is kind of a sealed unit. If you were to take this actuator apart you would see that the motor drives a heavy pitched threaded screw. As it turns it causes the threaded tube

Testing effect of non-clean flux residue on solder joints

Electronics Forum | Mon Mar 20 16:47:13 EDT 2017 | u4bga

We're currently using no-clean flux (SR-12) in a no-clean manual soldering process. The brownish flux residue impedes direct visual inspection of the solder joints. Therefore, we're forced to clean the residue off. (1) Is there testing we can do

Testing effect of non-clean flux residue on solder joints

Electronics Forum | Fri Nov 03 09:31:35 EDT 2017 | davef

On the flux reside issue that is gumming up your test probe pogos ... Short term, clean what's in process with a aerosol flux cleaner solvent. Ask your flux supplier for recommendations. Longer term, recognizing that there is no fix, your improveme

RoHS and Non-RoHS products in same ICT Fixture

Electronics Forum | Fri Mar 24 15:31:08 EDT 2017 | elrohir

I have a supplier that want to upgrade all nails on a huge amount of ICT fixture due to test RoHS compliant PCBAs. My thought is that even if there are a very small fraction of residues left on the pins it will never go over the 1000PPM level. In fu

RoHS and Non-RoHS products in same ICT Fixture

Electronics Forum | Tue Mar 28 14:35:04 EDT 2017 | emeto

I can't believe there is a topic for discussion. Find a way and measure lead contamination(if any)and prove them wrong. This is getting out of control. Having all the billions of gasoline and diesel engines pumping dirt in the air, together with the


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