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April 2007

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Subject:
From:
"Wenger, George M." <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Wenger, George M.
Date:
Tue, 17 Apr 2007 09:03:19 -0400
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text/plain (83 lines)
The only way to know for sure is to get samples and try i
Steve,



The only way to know for sure is to get samples and try it.  It has as

good a chance of working as ENIG.  Did your customer give you any

indication of why they wanted you to switch from ENIG to IAg? 





Regards, 

George 

George M. Wenger 

Senior Principle FMA / Reliability Engineer 

Wireless network Solutions 

Andrew Corporation, 40 Technology Drive, Warren, NJ 07059 (908) 546-4531

[log in to unmask] 





-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Kelly

Sent: Tuesday, April 17, 2007 8:58 AM

To: [log in to unmask]

Subject: [TN] Immersion Silver



Good Day To All,



One of our customers has asked us to look at changing the finish on a

flex circuit we manufacture from ENIG to Immersion Silver. The circuit

is complex and requires that we laminate on metal stiffeners after the

immersion silver. This would require a full cure cycle of approx. 375F

for 1.25 hours under pressure. The circuit would then have to undergo an

approx. 6 hour bake before assembly. Assembly requires 2 reflows. My

question is will the silver still solder. This is a Class 3 product and

we are loading BGA's.

Thanks in advance. Steve Kelly



 



Steve Kelly



PFC Flexible Circuits Limited



PH: (416) 750-8433



Fax: (416) 750-0016



Cell: (416) 577-8433



 





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