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August 2008

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Subject:
From:
Joyce Koo <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Joyce Koo <[log in to unmask]>
Date:
Thu, 21 Aug 2008 08:31:11 -0400
Content-Type:
text/plain
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text/plain (143 lines)
Zero penny for me 
Jk
--------------------------
Sent using BlackBerry


----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Thu Aug 21 03:01:53 2008
Subject: Re: [TN] Diffuse topic

FIB? no way

Inge

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Igoshev, Vladimir
Sent: den 20 augusti 2008 20:28
To: [log in to unmask]
Subject: Re: [TN] Diffuse topic

??? If FIB were producing that surface quality, no one would be paying that amount of money for the machines :-)

Vladimir

-----Original Message-----
From: Joyce Koo [mailto:[log in to unmask]]
Sent: Wednesday, August 20, 2008 2:26 PM
To: Igoshev, Vladimir; TechNet E-Mail Forum
Subject: RE: [TN] Diffuse topic

Sorry, should be FIB...need more coffee...jk

-----Original Message-----
From: Igoshev, Vladimir [mailto:[log in to unmask]]
Sent: Wednesday, August 20, 2008 2:23 PM
To: TechNet E-Mail Forum; Joyce Koo
Subject: RE: [TN] Diffuse topic

There is NO WAY it was ion milling. Just look at the huge directional scratches on the surface :-)

Vladimir

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joyce Koo
Sent: Wednesday, August 20, 2008 2:19 PM
To: [log in to unmask]
Subject: Re: [TN] Diffuse topic

(1) is it done by ion milling?  You might have carried over sputtering.
(2) excessive grain boundary diffusion might be the case.  The structure looks grainy (not layer by layer growth...).  Possibly too high of current density (not enough time for atom to diffuse along the surface...). Is the surface very rough?

Good luck..
              My 1.86 cents

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Wednesday, August 20, 2008 8:00 AM
To: [log in to unmask]
Subject: Re: [TN] Diffuse topic

Mornin' Inge!

Got your picture up! Go to:

http://stevezeva.homestead.com/files/Nickel_Diffusion.jpg

Steve

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Hernefjord Ingemar
Sent: Wednesday, August 20, 2008 5:08 AM
To: [log in to unmask]
Subject: [TN] Diffuse topic

Investigation of coax Kovar/glass feed thrues soldered to nickel plated metal bodies gave, that nickel from the feed thrue's barrel nickel plating diffused as much as 38 micrometers (!)into the tin from the tin/lead solder during the vapour phase soldering. Nickel had diffused from both the feedthrue and the package.  How is that possible? Thought polish smear gave false picture, but the analyst claims that what you see is true nickel diffusion and nickel/tin IMCs. I'll ask dr Gregory for help with a photo for  you all. The sample you will see is exposed more than normal to an etchant to prove that smear is not the case..start from the bottom shows nickel (black), nickel IMCs (greyish) and topmost tin (bright). There is nearly no lead present.

Inge

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