James,
look at AVX cap pages, and you will see that they put nickel even over
the copper. George Wenger sent me some very nice cross section pics
that illustrated the nickel on copper. So, only-copper caps..I've
not seen such...yet
On poor RF conductivity of nickel, yes, we know. But if you have already
connected all the 50 cap layers and 'gathered' the signals by means of
copper, it may not be so disastrous with a thin nickel barrier on outside.
My guessing...

Ingemar


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of James TerVeen
Sent: 11 April 2005 14:22
To: [log in to unmask]
Subject: Re: [TN] Hoy! John Maxwell, are you somewhere out there?


Ingemar it looks like you have been double plated.   Most terminations with
copper are for RF applications because they take the ferrous metal out of
the circuit.   I do not know why they would plate with copper and then
nickel over.  I would guess this may be the root of your problem.



                      "Ingemar Hernefjord
                      (KC/EMW)"                     To:
[log in to unmask]
                      <ingemar.hernefjord@ER        cc:
                      ICSSON.COM>                   Subject:  Re: [TN] Hoy!
John Maxwell, are you somewhere out there?
                      Sent by: TechNet
                      <[log in to unmask]>


                      04/11/05 03:06 AM
                      Please respond to
                      TechNet E-Mail Forum;
                      Please respond to
                      "Ingemar Hernefjord
                      (KC/EMW)"






adding cross section picture for Steve's gallery...
Ingemar

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]
Sent: den 11 april 2005 08:56
To: [log in to unmask]
Subject: [TN] Hoy! John Maxwell, are you somewhere out there?


John, need immediate advice from you, as you are being very familiar with
ceramic caps. Got problem with 0603 100nF/16VDC/X7R, Rins > 10-100 kOhms,
sometimes lower. Failure rate 1-2%.
Q: Terminals AgCuNiSnPb instead of usual AgNiSnPb. Never seen Cu before. Why
Cu? Thx in advance Ingemar Hernefjord Ericsson Microwave Systems

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