Electronics Forum | Thu Sep 10 15:06:11 EDT 2009 | dyoungquist
My guess is that he is talking about the gold plated pads not fully wetting with solder. We have seen this on some of our ENIG boards with the gold still showing at the far corners of the rectangular pads. Not knowing if this is hand soldering or p
Electronics Forum | Tue Mar 25 11:25:18 EDT 2014 | horchak
The first impression I get is that the mask was applied over dirty or contaminated copper. What is the trace and land finish on the PCB? You also appear to have a wetting problem.
Electronics Forum | Tue Mar 25 13:55:05 EDT 2014 | horchak
Ok lets put it this way. If the PCB house used a high quality mask and properly applied it to a properly cleaned surface and properly cured it, then as Dave stated above there are only two things that can destroy it. Excessive heat and overly aggress
Electronics Forum | Tue Mar 25 11:43:48 EDT 2014 | sara_pcb
It is Solder Mask on Bare copper, The land finish is HASL as per MIL-PRF-55110G which accepts trace of HASL as acceptable. Wetting is acceptable. regards, R.Saravanan
Electronics Forum | Sun Oct 11 13:53:26 EDT 1998 | Vincenzo Longobardo
I have datas to substain that a not wetting PCB ( the HAL oxided or not uniform in thickness )if soldered in reflow, it shows voids with X-Ray inspection.The voids are in side all the joints not only on the solder pads levell. Is there a technical d
Electronics Forum | Mon Apr 23 14:02:26 EDT 2001 | relensky
I am looking for a repeatble method to determine the quality of solder wetting to a PCB. I would like something that I can perform in-house, at low cost, with reliable results. My goal is to test the wetting on white-tin PCB's, after repeated reflo
Electronics Forum | Tue Oct 13 18:32:35 EDT 1998 | Vincenzo Longobardo
Dear Mr. Earl Moon please give me all your information and pictures to know the reason of the voids formation caused by the HASL oxidation. I am very interested to this experience. With Best Regards V.Longobardo |
Electronics Forum | Tue Apr 24 11:48:06 EDT 2001 | relensky
Thank you for the input
Electronics Forum | Thu Jun 29 09:55:54 EDT 2023 | matouschekd
Yes, i tried cleaning it with PCB-Cleaner. Sadly, no success
Electronics Forum | Wed Oct 14 08:32:45 EDT 1998 | Earl Moon
| Dear Mr. Earl Moon | please give me all your information and pictures to know the reason of the voids formation caused by the HASL oxidation. | I am very interested to this experience. | | With Best Regards | V.Longobardo | | | | I will assemble
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