Electronics Forum | Wed May 04 22:04:55 EDT 2005 | davef
First, you cannot determine if this is "black pad" by looking at it. You must do laboratory analysis, either microsectioning or EDS. [But it sure sounds like "black pad."] Second, if it is black pad, it was created by the company that fabricated t
Electronics Forum | Thu May 05 16:02:43 EDT 2005 | russ
I don't believe that you are seeing black pad. I think you are seeing an oxidized pad from your statement that these pads take solder. I would guess that these will be fine. But I would re-tin all pads prior to attaching the BGA to make sure.
Electronics Forum | Thu May 05 15:25:38 EDT 2005 | jimmiem
Would a lesser degree of black pad still allow solderability as i seen in my case?
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
Electronics Forum | Thu May 05 09:17:58 EDT 2005 | jimmiem
I tried soldering to several of the black pads and was successful, the solder stuck with no hesitation. so i guess this is not truly "black pad"? would that be a correct statement? What causes this blackening that looks like oxidation under the mic
Electronics Forum | Thu Aug 21 22:47:39 EDT 2003 | adlsmt
Well after reading all kinds of stuff about this I still question if it is my current problem BUT, how common is this??? I dont want to be afraid of the boogie man but it seems like a lot of folks are having problems with black pad. I have used imers
Electronics Forum | Thu May 05 11:55:52 EDT 2005 | jimmiem
Was it determined what caused the flux migration?
Electronics Forum | Thu May 05 17:23:54 EDT 2005 | jimmiem
Thanks Russ and Dave for time and patience. Best regards jm
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,
Electronics Forum | Wed May 04 13:13:43 EDT 2005 | Jimmie
We have seen the black dot on the BGA pad after the component has been removed from a PCB. When most likely could this corrosion have occurred, while the component was in storage, during manufacturing of the unit? We have a number of these BGA's th