Frank,
Don't forget to count cooling zones when you load options on you machine.
Cooling a BGA at too fast a ramp can induce serious stresses and warpage.
Ideally you would cool close to the same rate as you heat.
JIm KIttel

-----Original Message-----
From: Frank L Norman [mailto:[log in to unmask]]
Sent: Thursday, February 14, 2002 8:33 AM
To: [log in to unmask]
Subject: [TN] Reflow heater zones, how many?


Hi All,

Can a reflow oven with four heater zones be used to reflow BGA and
0402-0805 chips? And, what is the general school of thought on the subject
of reflow oven heater zones needed to reflow the various technologies?

Frank

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