Electronics Forum | Wed Jul 10 16:34:23 EDT 2013 | hegemon
Preheating is critical in Vapor Phase Soldering. One trick that is done is to use the "soft vapor" area just above the soldering vapor, some machines can pause just before going into the soldering vapor. Using that pause above the vapor to continue
Electronics Forum | Wed Jul 10 14:29:27 EDT 2013 | isd_jwendell
You wouldn't have a very good profile if you went straight from room temp to vapor temp (_-). The chamber should preheat the board before using vapor to melt the solder.
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vapor phase reflow soldering. The reason for such defects is usually caused by the fact that the thermal conductivity of the relevant component leads is too high, and the temperature rises too fast, which causes the upturn of the