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Can this warpage calculation be shared with other like my self?
Victor,
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Hfjord
Sent: Tuesday, January 08, 2008 9:56 AM
To: [log in to unmask]
Subject: [TN] SV: [TN] Warpage of components
I promised a simple warpage calculation formula, if not too many, I'll send
offline...
Inge
-----Ursprungligt meddelande-----
Från: TechNet [mailto:[log in to unmask]] För Werner Engelmaier /*
Skickat: den 8 januari 2008 14:15
Till: [log in to unmask]
Ämne: Re: [TN] Warpage of components
HI Ingemar,
Well said.
A warpage criterion for components would have to be based on a total
out-of-plane measurement at soldering temperatures. This non-coplanarity
measure would
have to be about the thickness of the solder paste layer to avoid solder
opens, and it would have to be based on the total final solder joint
thickness to
avoid solder joint cracking due to warpage tensile loads on cooling from
reflow.
Werner
**************
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