Electronics Forum | Sun Jan 14 16:35:48 EST 2007 | Austin
I have several boards built at various CM's. We have prototype builds with some JTAG failures on BGA's (1-3 failures with qty 3, 1500 pin BGA's). CM's always claim reflow profiles look good. X-ray does not show bridges and they claim it looks good, b
Electronics Forum | Tue Aug 31 13:23:37 EDT 2004 | frankracine
Thanks Ken for your reply. Concerning OSP, there are a few negative points that I must considered for our application. I've read all the following points in an Entek document. Never test it. - If you have a miss print and you clean the PCB, the co
Electronics Forum | Tue Dec 21 08:33:54 EST 1999 | Nancy V
Luis, Go to the library on SMTnet and you will see Standard and Terms. Select that and you will be able to download the terms and definitions for SMT assembly. It is very useful. Of the terms you requested, only FPY is not there. I was curious a
Electronics Forum | Mon Jul 21 03:48:06 EDT 2014 | edriansyah
Ensure you control the assembly completion. My previous experience, we control the assembly MUST be completed within 72 hrs, since you open the bare PCB seal, until you completed all the soldering process (Reflow & AWS). We manage to control the abo
Electronics Forum | Sun Dec 25 09:51:54 EST 2022 | msirifat
Hello, We use OSP-finished PCB. One component (transformer) will be delayed (approximately 4 months) to getting in our hands. We want to partially complete the PCBA (both SMT & MI) in the meantime and later insert the transformer upon arrival thr
Electronics Forum | Thu Apr 01 21:18:31 EST 1999 | Chris Kelly
Glenn, There are both very good VOC-Free fluxes as well as alcohol based fluxes out there. This should be your primary focus if you are so lucky as to have to opportunity to actually select a flux! The use of nitrogen will benefit any no-clean pro
Electronics Forum | Mon Apr 17 16:17:47 EDT 2000 | Dennis Fall
Typically, Sn/Pb solders are used to preserve solderability on leaded and leadless SMT components. Are other finishes (such as those used in PCB manufacturing e.g. Sn, NiAu, OSP's, etc.) frowned upon by PCB stuffers and their customers? I am intere
Electronics Forum | Tue Aug 22 16:02:07 EDT 2000 | Dr. Ning-Cheng Lee
If the thermal mass of the products is small, a tent-shaped profile is recommended, with peak temperature around 240C. The hottest spot on board should be less than 250C. However, if the thermal mass of the product is large, such as a large server PC
Electronics Forum | Fri Jul 08 11:33:21 EDT 2016 | markhoch
Quick question for all you SMT Experts... Where do you buy your thermocouples for Reflow Profiling?
Electronics Forum | Wed Feb 23 19:04:19 EST 2000 | Jason Nipper
Hi Mike, I have had problems in the past that were very difficult to determine the source of. Our tombstoning issues were caused by the plating on the part itself. If your smd placement, x-y positioning and placement pressure is not an issue, and
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