Hi Ed,

        I understand that there are some Nickel-Boron baths out there that will
have no Phosphorus; you might look into some of them. I'm not sure of the
particular chemistry that you are running, but as I recall the
Nickel-Phosphorus baths in general require the phosphorus to be maintained at
optimum to prevent cracking of the Nickel. Also the Phosphorus content was
related to the pH of the bath, all of which was related to the Nickel
properties.
  I don't know if they are still in existence, but Allied-Kelite used to
publish a great booklet on Nickel Plating.

I hope this is of some help.
Regards,
Les Connally
>  From: "Eltek Ltd. - Process Engineering" <[log in to unmask]>, on
>  10/21/98 7:50 AM:
>  I sent this message last week . No one responded . Maybe this week ?
>  Hi
>  We are running in our plant Electroless nickel - Immersion Gold  ( ENIG )
>  finishing for PCB based on Atotech chemistry . Phosphour content is in
>  middle range ( average 9% ) .
>  One of our customers request low phosphour content -  less than 7% .
>  We ae trying to force the chemistry to plate Nickel with such content of
>  phosphour by rising the temperature , increasing volume load ( sq cm per
>  liter of working solution ) etc , but untill now we do not have stable
>  process parameters .
>  Any recommendation for Atotech chemistry or someone else chemistry to
>  achieve the goal of phoshpour content in nickel less than 7% ???
>  Regards
>
>
>  Edward Szpruch
>  Eltek Ltd - Israel
>  Tel  972 3 9395050
>  Fax 972 3 9309581
>  E-mail :  [log in to unmask]
>
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