Paul,

Thanks for the feedback. Paste handling is on my list of questions for our
Thailand folks.  I hadn't considered how they did the profile they provided.
It's definitely worth asking.

Regards,

Rick Thompson

Sr. SMT Process Engineer
SMTEK International, Inc.
+1 (805) 532-2800
[log in to unmask]


===== Original Message from [log in to unmask] (TechNet E-Mail Forum.) at
1/02/03 1:36 pm
>Rick,
>Nothing specific about Koki, but here are some questions. Most times I have
>found the solution with these questions.
>1. How is the profile measured? (TC in air or embedded in board?)
>
>2. How is the paste controlled? (Is it sensitive to moisture?)
>
>Hope this helps.
>Paul
>
>-----Original Message-----
>From: Rick Thompson [mailto:[log in to unmask]]
>Sent: Thursday, January 02, 2003 3:21 PM
>To: [log in to unmask]
>Subject: [TN] Koki Lead-free Solderpaste?
>
>Hi,
>
>Does anyone have any experience using Koki Lead-free Solder Paste?  In
>particular, their S3X58-M301-3 series?  We're using this at our Thailand
>facility to solder some micro-BGAs and are seeing alot of voiding and
>subsequent failures related to the BGA.  The balls on the BGA are eutectic,
>63/37. Reflow profile is meeting the solder paste manufacturer's
>recommendations.  Unfortunately, I'm trying to find an answer for  this long
>distance as I'm not at the facility.  If anyone has any experience /
>recommendations with this solder paste that they can share it would be
>greatly appreciated.
>
>Thanks,
>
>Rick Thompson
>
>Sr. SMT Process Engineer
>SMTEK International, Inc.
>+1 (805) 532-2800
>[log in to unmask]
>
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