I'd be more concerned about SIR than lack of reflow. The concept of
activation is misleading.
Karen Tellefsen - Electrical Testing
Alpha / 109 Corporate Blvd./ S. Plainfield, NJ 07080
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908-791-3069
From: Robert Kondner <[log in to unmask]>
To: <[log in to unmask]>,
Date: 09/27/2012 01:13 PM
Subject: [TN] Flux Activation Temps
Sent by: TechNet <[log in to unmask]>
Hi,
I was looking though some paste datasheets which show a paste "Family"
available in different alloys.
My Question:
Is a single flux formulation being used with these different alloys? It
seems so.
But the various melting point have a serious range. And I remember from my
college chemistry days that reaction rates double for every 10 C rise in
temp. (Is that still correct?) So I would expect fluxes to be relatively
"Inactive" al low leaded temps but then going super-fast at higher lead
free
temps.
Can anyone clarify? Is it a real issue or hogwash-worthy.
Thanks,
Bob K.
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