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August 2008

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Subject:
From:
Guy Ramsey <[log in to unmask]>
Reply To:
Date:
Thu, 7 Aug 2008 11:11:40 -0400
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It really should not be any different than Sn63. I suspect your difficulties
are related to the board, not the solder alloy . . . Unless it is actually
Pb-Free solder like SAC 305 or Sn100.

Difficulties in either case are usually related the thermal transfer,
thermal mass of the tip and work piece must be considered. It may be
necessary to preheat the board and components. If you can, use flux as a
transfer medium. It will improve the rate of transfer and minimize hot spots
at the rework site. 

Resist the temptation to crank the temperature up on the iron, unless the
methods above are inadequate. 

Guy 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Pasquito, Helena
Sent: Thursday, August 07, 2008 10:21 AM
To: [log in to unmask]
Subject: Re: [TN] SOLDER FOR PCB REFLOW PROCESS

Having some difficulty reworking (hand soldering process)Sn62.  Any pointers
on iron temps and process? 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joe Macko
Sent: Thursday, August 07, 2008 10:03 AM
To: [log in to unmask]
Subject: Re: [TN] SOLDER FOR PCB REFLOW PROCESS

Many of our CMs like to use Sn62 on ENIG finished PCBs. They report better
wetting and better looking solder joints. The Ag in the alloy also helps
minimize any silver leaching out of certain components.
Lately however, they are reporting that this alloy is more costly to obtain
with larger minimum buys.

Best Regards,
-joe


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From: TechNet [mailto:[log in to unmask]] On Behalf Of Anat Douek
Sent: Wednesday, August 06, 2008 1:50 AM
To: [log in to unmask]
Subject: [TN] SOLDER FOR PCB REFLOW PROCESS

What is the preferred solder for reflow process of military application.
SN62 or Sn63 ?
 
Anat Douek
Process Engineer
Herley General Microwave Israel
tel. 972-25689455

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