I think you mean Gerard O'Brien. And yes, he would be a very good person to
speak with on this subject matter.
Joe Russeau
----- Original Message -----
From: "Gerry Gagnon" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, November 21, 2013 10:22 AM
Subject: Re: [TN] Final Surface finish
> Joyce,
>
> I think you nailed it.
>
> Immersion coatings have excellent copper coverage characteristices (due to
> displacement reactions) but are also VERY thin. If you push for higher
> deposit thickness (like everyone always wants) you get issues.
>
> Victor, you could run an SEM and energy dispersive x-ray map of the
> surface and pin it to the patent.
>
> XRF as you've been advised is a fun task indeed. This is probably a new
> formulation, so there might be issues finding good cal standards for the
> XRF. I think our friend George O'Brien would have something useful to say
> on XRF for you if he's lurking.
>
> Good hunting,
>
> Gerry
>
>
>
>> Date: Wed, 20 Nov 2013 20:17:22 +0000
>> From: [log in to unmask]
>> Subject: Re: [TN] Final Surface finish
>> To: [log in to unmask]
>>
>> Whiskeys free immersion tin coating? Like this?
>> http://www.google.com/patents/EP2494094A2
>>
>> Joyce Koo
>> Researcher
>> Materials Interconnect Lab
>> Office: (519) 888-7465 79945
>> BlackBerry: (226) 220-4760
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez
>> Sent: Wednesday, November 20, 2013 3:03 PM
>> To: [log in to unmask]
>> Subject: Re: [TN] Final Surface finish
>>
>> This final surface finish does NOT appear to be a HASL process. Unless,
>> the air knives pressure was so high that it did not leave ANY RIPPLES of
>> the copper pad surface.
>> Victor,
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Mike Fenner
>> Sent: Wednesday, November 20, 2013 1:52 PM
>> To: [log in to unmask]
>> Subject: Re: [TN] Final Surface finish
>>
>> Theoretically also PB-free HASL, I say theoretically because the usual
>> alloy is Sn/Cu or modified Sn/Cu on cost grounds.
>>
>> Regards
>>
>> Mike Fenner
>> Bonding Services & Products
>> M: +44 [0] 7810 526 317
>> T: +44 [0] 1865 522 663
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of GRIVON Arnaud
>> Sent: Wednesday, November 20, 2013 5:19 PM
>> To: [log in to unmask]
>> Subject: Re: [TN] Final Surface finish
>>
>> Immersion Tin?
>> Ag is known to be the anti-whisker additive for most chemistries.
>> Best regards,
>>
>> Arnaud Grivon
>> PCB/PCBA Technology Expert
>> Thales Global Services - ESS (Engineering Shared Services) 18, avenue du
>> Maréchal Juin Bât. C - Bureau C2-135
>> 92366 Meudon-la-Forêt Cedex
>> France
>> Tél : (+33) (0)1 70 28 23 88
>>
>> Visit our website : http://www.thalesgroup.com
>>
>> [@@ THALES GROUP INTERNAL @@]
>>
>>
>> -----Message d'origine-----
>> De : TechNet [mailto:[log in to unmask]] De la part de Victor Hernandez
>> Envoyé : mercredi 20 novembre 2013 18:15 À : [log in to unmask] Objet : [TN]
>> Final Surface finish
>>
>> Fellow TechNetters:
>>
>> Is there a final surface finish which has a high tin content along
>> with
>> some silver. It is not the traditional ImAg. The finish appears
>> somewhat
>> dull with good coverage on the edges of copper features.
>>
>> Victor,
>>
>>
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