Electronics Forum: soldering problems with qfn (Page 1 of 36)

Dross/Oxide problems with wave soldering machine

Electronics Forum | Sat Jan 29 16:35:33 EST 2000 | Robert Steltman

We have a Seho wave soldering machine and cannot seem to get rid of dross that is being generated within the solder pot, and is being pumped out in the wave. It is not the same kind of dross that forms on the surface of the solder pot(this is very m

Re: Dross/Oxide problems with wave soldering machine

Electronics Forum | Mon Jan 31 12:24:24 EST 2000 | Dave F

Robert: Several points: 1 Dross is a mixture of various things with no "fixed" composition: � The obvious things are metal oxides mixed with metal and this can vary in color with temperature and composition - remember some intermetallic oxides form

Reflow soldering problems and traces under component

Electronics Forum | Mon Jul 18 12:24:53 EDT 2016 | oleksz

Some people involved in PCB assembly process claim that SMD components reflow soldering problems are often caused by traces running under a component. According to this claim, trace (or any copper) covered by solder mask and placed under SMD componen

Reflow soldering problems and traces under component

Electronics Forum | Mon Jul 18 12:25:30 EDT 2016 | oleksz

Some people involved in PCB assembly process claim that SMD components reflow soldering problems are often caused by traces running under a component. According to this claim, trace (or any copper) covered by solder mask and placed under SMD componen

Solderability problems with gold plated PCB's

Electronics Forum | Wed Nov 11 13:51:19 EST 2015 | duchoang

Could you give us more details. Picture, profile, solder paste ...?

Solderability problems with gold plated PCB's

Electronics Forum | Thu Nov 12 11:21:42 EST 2015 | davef

IPC J-STD-003. Solderability Tests for Printed Boards

Solderability problems with gold plated PCB's

Electronics Forum | Mon Nov 09 06:28:03 EST 2015 | recard

Hi guys, we have a problem and I hope something can give nme some new information. We have big solderability problems with a gold plated board. We changed the paste already, but there is no improvement. Could the Vapor phase Technology cause the p

Solderality problems with SN100C Lead Free Hasl

Electronics Forum | Thu Sep 21 12:36:45 EDT 2006 | bradlanger

Just wondering if there are any users of SN100C lead free hasl finsh out there. If so what kind of results are you getting as far as solderability is concerned?

Solderality problems with SN100C Lead Free Hasl

Electronics Forum | Wed Sep 27 23:52:28 EDT 2006 | fctassembly

Hello Steve, Yes, there are differences in the various alloys and I have described briefly below these differences: SN100- a common name for 100% tin that is used to increase the tin content in 63/37. SN100C-Name for Tin/Copper/Nickel/Germanium all

Solder-ability problems with SN100C Lead Free HASL

Electronics Forum | Thu Oct 05 11:59:51 EDT 2006 | Mario Scalzo, SMT CPE

Good afternoon all! Theoretically, there should not be any issues soldering to the SN100C as the tin content of the molten paste alloy should wet to the finish with no problem. I would just ensure that the peak temperature of the joint is above the

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