Alain,

Just a thought. If you dried the boards at room temperature, 0%RH, would this
reduce their reliability?



> It increases cross linking inside the epoxy of the laminate,
> making is slightly more brittle and harder every time you
> bake it. It alsoi ncreases the speed of tin oxide formation,
> in effect it ages the board.
>
> It has also been suggested that a high temperature bake
> (> Tg) may cause warpage in a pressed board.
>
> Alain Savard, B.Sc.
> Chemical Process Analyst
> CAE Electronics Ltd.
> e-mail: [log in to unmask]
>
> -----Original Message-----
>
> Why does baking the board  reduce
> the reliability and life expectancy of the board?
>



Eric Christison

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