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June 2007

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Subject:
From:
"Brooks,Bill" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Brooks,Bill
Date:
Thu, 21 Jun 2007 09:09:46 -0700
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http://en.wikipedia.org/wiki/Nickel

Looks like Nickel is magnetic. They explain why the US coin we call Nickel
is non-magnetic because it is mostly copper. 

I know that in Microwave circuits nickel is very 'lossy' and an undesirable
finish component for that reason... 

Maybe someone with some metallurgy background can elaborate on the alloy
that you end up with when applying ENIG to the circuits on a board.

Bill



-----Original Message-----
From: Guy Ramsey [mailto:[log in to unmask]] 
Sent: Thursday, June 21, 2007 8:39 AM
To: [log in to unmask]
Subject: Re: [TN] PCB Finish

I thought the EN in ENIG stood for electroless nickel. Is electroless nickel
non-magnetic?  

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Wood, Kenneth
Sent: Thursday, June 21, 2007 9:46 AM
To: [log in to unmask]
Subject: [TN] PCB Finish

Hey all,
Question:
I design PCB's for MRI use so Nickel is no good because it is magnetic.
Is there a standard finish I can use that does not whisker like tin, has no
nickel like ENIG and can be made by anyone (most at least).
What about Silver? 
Thanks
Ken
 
__________________________________________

Kenneth Wood
Senior PCB Designer
Invivo Corp.
12601 Research Parkway
Orlando, FL 32826
Phone: 407-275-3220 ext. 179
Mobile: 407-340-2668
Fax: 321-239-1910
Email:  <mailto:[log in to unmask]> [log in to unmask]
Internet:  <http://www.invivocorp.com/> http://www.invivocorp.com

 

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