Electronics Forum | Wed Jul 09 10:15:57 EDT 2008 | aj
I have carried out some further measurements on the device and the results are as follow: Component Lead width measures 183 microns. Actuals PAD width measures 158 microns. What I am thinking is that the lead is attracting the solder hence prevent
Electronics Forum | Wed Jul 23 05:26:23 EDT 2008 | aj
Hi all, Thanks for all the replies. I got some XRF carried out on the boards ( ENIG) and they measure 0.03-0.04 microns of gold thickness. Boards that we have had no problems with measure 0.07-0.1microns. This looks like the main contributor alon
Electronics Forum | Tue Jul 08 15:37:14 EDT 2008 | realchunks
Volume that appears to be caused by wetting. Now remember most solder pastes will not "flow" across an entire pad. It will only flow where it is printed. In your pic, if the pad was covered and came out like this - it may be your pad. If it was
Electronics Forum | Tue Jul 08 18:13:03 EDT 2008 | arminski
How do you position those 3 items in your process after post-reflow? Is it possible to combine them as one process step, two or three processes? I am looking at the conflict of Interest in collecting Defects data for analysis. Can it be Touch-up as
Electronics Forum | Fri Jul 11 08:17:22 EDT 2008 | aj
Hi Dave, Yes that is correct. I had a XRF carried out on some boards that I am having solderability issues on and the report came back with 0.04um - 0.05um as the measured gold thickness. Previous batches that went through fine measured 0.07-0.11u
Electronics Forum | Tue Jul 15 15:56:39 EDT 2008 | boardhouse
I believe she is looking for: KLDX-SMT2 Series Surface Mount DC Power Jacks CallUS: 1-888-KYCON-22 � Fax: +1 408-494-0325 � http://www.kycon.com Here is the link to their data sheet-http://anacapa.kycon.com/Catalog_PDF/KLDX_SMT2.pdf Dissclaimer:
Electronics Forum | Thu Jul 17 08:17:50 EDT 2008 | edmaya33
5 mil stencil.instead of round, use diamond aperture. RSS profile @ 215�C peak temp on balls(Sn/Pb), with a total of 3.5 minutes profile lenght.Ramp rate at 1.7�C/sec from ambient to 160�C. Consider also good cooling system on reflow. If rework proc
Electronics Forum | Mon Jul 14 10:17:27 EDT 2008 | dwelch123
Ed,,You need a temp gauge to verify tip temp and if it's a digital control iron and it's off usually just junk it. If dial control you can loosen knob and adjust to reading.If you need to know type of gauge and manufacturer drop me a line
Electronics Forum | Mon Jul 14 11:33:35 EDT 2008 | stepheniii
It depends on the type of iron. Some of ours have a little plug you pull out that exposes a pot that you tweak to make the temperature of the tip the same as the reading. Others can't be adjusted and the heating element must be replaced if they don't
Electronics Forum | Mon Jul 14 07:49:50 EDT 2008 | edmaya33
Do we really need to follow the IPC J-STD-001 Solder purity? If so, how to effectively balance the chemistry of Sn63/Pb37 other than adding a pure tin on the solder bath? Is this really needed to monitor in monthly basis?How many kgs of pure tin pe
