Electronics Forum | Tue Aug 10 06:29:49 EDT 2004 | Nippy
Hello, I am in need of some assistance with a problem we are having with soldering some terminals... Basicaly I need to solder thin tabs onto a round metal post (hole through tab) We have been seeing poor quality joints, de-wetting and what looks l
Electronics Forum | Tue Jun 28 16:41:07 EDT 2005 | mattkehoe
Yes, .062 fr4. Like I said before, we run a lot of gold boards, as many as 25% of what goes through the shop, and we've never adjusted anything before??? Many of these are bigger by 2 X and much more dense. Reflow is not as shiny as HASL but always u
Electronics Forum | Wed Jul 12 11:46:00 EDT 2006 | flipit
Hi, One other note. You don't want gold to be more than 1% to 2% of the the solder joint. Above this percentage you will have embrittlemant issues. Lots of information on gold embrittlement on this site and on the Internet. I estimate your produ
Electronics Forum | Tue Jun 28 10:51:32 EDT 2005 | mattkehoe
Thanks for the replies, - solder paste used ? NC ? other ? Water soluble 63/37 paste - reflow in Air or N2 ? Infrared - temp ramp up before soack (�C/second) ? Will have to check. This profile has been used on numerous gold plated boards in our
Electronics Forum | Tue Jul 11 20:13:05 EDT 2006 | davef
We agree with Chunks. You need to turn-up the heat [slow the conveyor] because you have significantly changed the melting point of the solder alloy by adding so much gold. Relative to ENIG you should expect: * Similarly smooth surface, possibly a l
Electronics Forum | Tue Aug 31 12:42:45 EDT 1999 | Charles Barker
****************************************** ***************** HELP! *************** ****************************************** We are having a special ceramic smt board made. The boards are 16-up arrays that have smt pads on both sides. Only thre
Electronics Forum | Mon May 18 13:30:15 EDT 1998 | Earl Moon
| I'm reviewing my board fab spec. It calls for a minimum SnPb thickness of 50 microinches on HASL PWB's. I've looked at other specs that call out anything from 30 to 80 microinches, and others that just say the copper pad must be covered and solde
Electronics Forum | Tue May 14 22:09:04 EDT 2013 | ultimatejoker
Hi, what is significant different between PdNi and PdCo Plating? I found in some papers indicate that the deposit characteristics for both plating is totally the same.
Electronics Forum | Sat Jun 21 00:37:20 EDT 2003 | nifhail
Most of the capacitors & resistors supplier have implemented Leadfree finished on their components and like it or not, most of the PCBA house already using them in their process. I just got a notice from my component supplier telling me that they wil
Electronics Forum | Thu Nov 10 20:39:44 EST 2022 | SMTA-64386598
The solderability shelf life of ENIG is related almost entirely to diffusion of O2 through the gold plating. When O2 diffuses through the gold, the underlying nickel is oxidized rendering it unsolderable (with ENIG - you solder to Ni, the gold dissol
