Electronics Forum: black pads (Page 1 of 32)

black and grey pad

Electronics Forum | Sat Oct 06 08:42:21 EDT 2001 | davef

Please give us additional background on your board, solder, process, etc. If you are talking about black pad in ENIG solderability preservative, check the fine SMTnet archives to get started.

black and grey pad

Electronics Forum | Sat Oct 06 05:33:47 EDT 2001 | spchua

I had recently encounter the "black and grey" pads problems for the BGA pad after the convection re-flow. The pads shows in in "black and grey" color and a litter solder in it, and it happen in ramdom, when applied heat and solder on the "black and g

Weak joint strength and black residue

Electronics Forum | Fri Jun 08 17:22:51 EDT 2007 | naynayno

We have been producing an IMS assembly with SMT dpak's for some time. However, we recently encountered a new problem by chance - the parts can be flicked off with a finger nail. I state by chance because the solder joints are wetted and shiny with

ENIG (thru hole ring turns black after wave soldering)

Electronics Forum | Thu Jun 30 03:14:34 EDT 2016 | andrzej

Looks like "black pad" issue. More about this here: http://www.ipc.org/feature-article.aspx?aid=Black-pad Definitly PCB supplier need to improve the process.

ENIG (thru hole ring turns black after wave soldering)

Electronics Forum | Wed Aug 24 22:11:36 EDT 2016 | davef

I'd guess that "black pad" is not the issue that you need to address, because only 2 of your 5 test points has the problem that we seem to be discussing. I'd expect "black pad" problems to be more wide spread. Something is going on at those two locat

ENIG (thru hole ring turns black after wave soldering)

Electronics Forum | Tue Aug 02 15:03:37 EDT 2016 | davef

On a previous black pad experience we soldered a wire to a fiducial and did a pull test to failure. On the black pad board the wire and solder pulled of clean leaving the fiducial on the board. On good boards the copper came off with the wire. If you

ENIG (thru hole ring turns black after wave soldering)

Electronics Forum | Mon Aug 22 22:40:52 EDT 2016 | twhoo

analysis report is as attached. Pls let me know what you think of the root cause of this issue? Can i conclude this is a black pad at thru hole ring with a root cause of contaminated gold

ENIG (thru hole ring turns black after wave soldering)

Electronics Forum | Mon Aug 29 08:44:57 EDT 2016 | jrrt_williams

As an OEM repiar tech I would run into "Black Pad" on occasion, though mostly on surface mount pads. The only way I could remove the oxidation was to apply water soluble flux and add solder, then wick away the excess. This left me with a suitable s

ENIG (thru hole ring turns black after wave soldering)

Electronics Forum | Mon Jun 27 11:01:58 EDT 2016 | mufflerbearings

From the pic, it looks like you have a bad board; ENIG process issue. It used to be called black pad for SMT but I'm sure it's the same condition for T/H. Any good electronic lab should be able to id the black stuff. I would also send raw boards bac

ENIG (thru hole ring turns black after wave soldering)

Electronics Forum | Tue Aug 02 15:02:50 EDT 2016 | davef

ASPIS (Advanced Surface Protection for Improved Reliability PCB Systems) The three year Aspis ‘Research for SMEs’ project has been conducted to address problems found with the nickel gold (ENIG) solderable finishes that are used by the electronics in

  1 2 3 4 5 6 7 8 9 10 Next

black pads searches for Companies, Equipment, Machines, Suppliers & Information