Electronics Forum | Mon Jun 05 10:32:39 EDT 2000 | Khalid Saeed
It could be a gold finish problem. The recommened gold finish thickness is less than five micro inches. Gold thickness greater than five microi inches is significant contributor for causing embrittlement of the solder joints. Verify the reflow profil
Electronics Forum | Tue Jan 14 11:39:51 EST 2020 | avillaro2020
Thanks Robl. I’ve contacted samtec followed their advice but ended up empty handed. Originally my stencil thickness is 6 mils, samtec stressed the need for the paste and charge to have good contact but this is challenged by the inherent charge non-co
Electronics Forum | Thu May 04 04:29:05 EDT 2023 | abhishek10
we have observed a Field claim in ECU where root cause is Lead lift found in one of the IC. What could be the possible reason for lead lift and how to avoid the same in future. QFP is the Type 1.Checked the Part Library(3-D Check Refernece no.-23
Electronics Forum | Sat Jul 22 13:20:35 EDT 2023 | shrikant_borkar
Dear Abhishek, I too got the opportunity to investigate this defect Lift lead for SOT. Lead lift in IC, and SOT can occur due to various reasons. Here are some possible reasons for lead lift and ways to avoid them: During the assembly process, mecha
Electronics Forum | Wed Oct 06 08:49:22 EDT 1999 | Mark
| | I hope that someone can help me with my problem! I am experiencing a lot of glued on parts falling off in the wave solder machine. A little information about my process: 1)We use Loctite 3609 glue that is used up long before its shelf life 2)Ou
Electronics Forum | Tue May 25 12:24:17 EDT 2021 | bukas
is Mark3 program started on startup or do you start it manually? It can be like this if you run it manually. Other cause is bad contact in PCB slot or connector in 90% cases. Wash then with contact cleaner and insert and pull out few times to clean c
Electronics Forum | Thu Jun 08 19:51:22 EDT 2006 | grantp
Hi, That's good news, and we did outs with SN100C as well on Wed, however we are still working hard on getting a good profile. We have some large BNC connectors, and they are hard to profile. We also have wave palettes, and these might be too thick
Electronics Forum | Mon Mar 29 18:17:48 EST 2004 | kerryn
It should be noted that some of the main reasons to change from manual cleaning to automated stencil cleaning are: � Manual cleaning is not consistent � quality is totally in the operators hands � Contamination left on the stencil and in the aperture
Electronics Forum | Mon Mar 05 17:54:07 EST 2012 | swag
Three ideas for you: 1) Make sure nozzle tips are clean. 2) Check coplanarity of leads to bottom of body. If leads are above body, it could be the are not contacting paste well. 3) Investigate static charge in the parts caused by the feeder or
Electronics Forum | Mon Feb 24 00:59:47 EST 2020 | sssamw
=0.08g/mm2, make it less than 0.08. And maybe the connector gravity center location is a cause also. If no machine issue (vibration, wind,etc), and you cannot change the design/material then you can use SMT glue to fix the connector during reflow.
