http://ieeexplore.ieee.org/document/1645469/

> Hi Mike - the general consensus is that there is an issue with the nickel
> plating layer. Not a ton of data in the published literature but a topic
> that has been discussed a length in the IPC-JSTD-002/003 committees at
> times.
>
> Dave Hillman
> Rockwell Collins
>
> On Thu, Dec 15, 2016 at 7:53 PM, Lehmicke, Michael <
> [log in to unmask]> wrote:
>
>> What is the root cause of Black Oxide issues in ENIG plating?
>>
>> Mike Lehmicke
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>> Molex, LLC-Printed Circuit Solutions
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