Electronics Forum | Thu Jun 08 18:19:40 EDT 2017 | edhare
Jeff, You might look at this paper, which has some background & references that are relevant to your question ... http://www.semlab.com/papers/diffusionbarrierplatinginelectronics.pdf Ed Hare
Electronics Forum | Mon Feb 27 06:42:37 EST 2006 | Slaine
What are the long term issues with high tin content solders on parts plated with silver over copper? Is it possible that the silver will be absorbed by the solder then over a long period of time the tin will react with the copper causing it to part
Electronics Forum | Fri Aug 22 14:24:54 EDT 2008 | boardhouse
Paul, I would do two things, eval whole lot for any etching issues as shown above and scrap and two I would have your copper thickness checked, my guess your copper plating will be low. Check plating thickness in Via holes - if less then 8/10th's r
Electronics Forum | Fri Jul 24 07:43:56 EDT 2009 | davef
Your customer is correct. You are doing something wrong in your hand soldering process. Solder balls are a process indicator. Areas to assess are: * Moisture content of the bare board * Thickness of the copper plating in the through holes * Temperatu
Electronics Forum | Tue Dec 09 18:03:39 EST 2008 | davef
First, you cannot determine foil thickness from its weight per area, because there is significant variation in the density of electrodeposited copper. Second, the official IPC specification for minimum thickness is "after" processing by the fabricat
Electronics Forum | Thu Aug 25 16:50:13 EDT 2005 | Mark
I have an application that requires soldering pieces of metal (copper plate and copper fins to make a heatsink). Each piece is about 1 lb. I cannot test it in our reflow oven (5 zone) since the piece is about 3" in height. Has anyone attempted to
Electronics Forum | Wed Aug 07 08:43:32 EDT 2002 | davef
Comments on copper plate temperature monitoring are: * Some people use this type of temperature monitoring to start the day as an element of an oven capability measurement and monitoring program. * Using a copper or other metal plate, like aluminum,
Electronics Forum | Thu Jun 08 09:43:42 EDT 2017 | davef
You know the scary part about your mentioning a tread where I post something? Well. let's just say that 2007 was a long time ago. Anyhow, silver will dissolve into your solder and provide no barrier. Some people apply a silver flash plating over the
Electronics Forum | Wed Jun 10 18:40:00 EDT 1998 | Earl Moon
| I am looking for the Industry standards on vias. Are they required to be plated with solder or is copper plating enough? What about reliabilty with either one? Also, if tenting the via is required should it be copper plated or solder plated over
Electronics Forum | Fri Jul 10 07:34:00 EDT 2020 | elijah
From the poor bonding strength of the board, the surface quality problems of the board are divided into: 1. The cleanliness of the board surface; 2. The problem of micro graphite (or surface energy) on the surface. PCB circuit board proofing Youke bo
