Electronics Forum: black and pad (Page 1 of 63)

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

force between the pad and laminate material

Electronics Forum | Mon Jun 17 13:45:29 EDT 2002 | genny

When the pad comes off, is it leaving behind a "black" area? Your board may be suffering from black pad - a condition that occasionally affects ENIG finish boards. It is a process control issue with your board fabricator. The nickel is oxidising b

force between the pad and laminate material

Electronics Forum | Thu Jun 20 04:49:34 EDT 2002 | scottxiao

according to the ressult of cross-section and removing the component, I find there is no black area in the left pad, and the IMC is also normal, so the black nickle is less impossible. the PCB material is not common FR4, just some thing like ceramic,

Black pad

Electronics Forum | Wed Aug 17 12:26:06 EDT 2011 | rdubya

Hey all need your input, this looks like classic black pad to me. what do you think?

Black pad

Electronics Forum | Wed Aug 17 21:29:25 EDT 2011 | davef

If looks were the measure, we'd say, "Hail yes, it looks like black pad." The determination of black pad or not is best done in a laboratory.

Black pad

Electronics Forum | Fri Aug 19 11:13:40 EDT 2011 | eezday

I'm still sold on the "black pad" model. The price of gold should be a good indicator of what is happening. The gold plating solution is being used well past its life and plating times are stretching. Extended time in the plating solutions is a lo

Weak joint strength and black residue

Electronics Forum | Fri Jun 08 18:27:03 EDT 2007 | jmelson

This is probably an inner plated layer of the component that did not bond well. It may be a component that either has the wrong surface finish for lead-free or can't handle the temperatures. Many times I have seen a similar-looking layer when the l

Black pad

Electronics Forum | Thu Aug 18 12:10:40 EDT 2011 | rdubya

Do you happen to know of any good labs for this analysis?

  1 2 3 4 5 6 7 8 9 10 Next

black and pad searches for Companies, Equipment, Machines, Suppliers & Information

Sell Used SMT & Test Equipment

High Throughput Reflow Oven
Selective soldering solutions with Jade soldering machine

High Precision Fluid Dispensers