Prem,

Try Ni-etchant TFG from Transene. It has high
selectivity with Copper (sputtered or plated). Here is
the link for more information:
http://www.transene.com/ni_etchant.html

Regards,
Adnan Merhaba


--- Prem  Pal  wrote:

>
> Dear researchers
> Is there any Ni-etchant solution which has high
> selectivity with sputtered Copper (Cu) metal.
>
> Any kind of suggetions will be highly appreciated.
> Thanks in advance
>
> Best regards
> Prem
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