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Hi. I am trying to understand Tg and how it relates to reflow. With the higher temperatures of lead free, we have been looking toward laminates with a Tg of 180 instead of the current 140. My question is a little more general. In either lead free or leaded reflow, these temperatures are greatly exceeded. What happens when the Tg is surpassed? Is there a point when it is greatly surpassed that we are concerned about?
Sorry for my ignorance ...
