Just an observation, connecting copper to aluminium is very bad news for
corrosion. I hope this piece of kit is destined for a nice benign
environment....


> Phil,
>         rather than plating the through holes, why not fill with a
>  screen
> print/ thermal cure conductive? The effectiveness of this method may
>  depend
> on hole diameter & panel thickness.....
> just a thought.
>
> David Albin
> Coates Circuit Products
>
> -----Original Message-----
> From: Phillip E. Hinton [mailto:[log in to unmask]]
> Sent: 29 June 2001 05:45
> To: [log in to unmask]
> Subject: [TN] Copper Plating Aluminum
>
>
> All
>
> Some designer has called out a plated-thru PC board that has copper
>  layers
> and aluminum cores joined by plated thru copper holes.  I am aware of
>  two
> lousy methods that have been used.  One is to use electroless nickle
>  instead
> of electroless copper to give a metallic coating in the holes prep the
> holes.
>  A zincate process precedes the electroess nickel.  The second is to use
>  a
> board that has been zincated and use pryo copper asa a plating solution.
>
> Does anybody have any other less difficult magical solution(s)
>
> Thanks
> Phil Hinton



Eric Christison

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