Hi Richard,

it about 30% faster and you should know that only thermal radiation and
thermal conduction work in vacuum oven, no convection because of no air
exist.  You should add more shelves and spread the PCBs / components on the
shelves to assure good contact.

The advantage is less oxidation on pads / metal parts.

Reuven

On Fri, Jun 1, 2012 at 5:47 PM, Richard Kraszewski <
[log in to unmask]> wrote:

> I would appreciate anyone sharing their thoughts on vacuum drying of PCB's.
>
> What conditions do you use? (Time, temp and vacuum)
>
> I realize it can be used to reduce required peak temperature but is there
> potentially any time reduction benefit to using vacuum?
>
> I saw a paper from the "Electronic Components and Systems Division within
> German Electrical and Electronic Manufacturers´Association Working Group",
> entitled
>
>  "Recommendation & Guideline Values for drying for bare PCBs"
>
> The offered a rather paltry reduction in drying time of 60 minutes from 8
> hours if vacuum was used. Doesn't seem like much of a benefit.
>
>
> Rich Kraszewski/PLEXUS
>
>
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*Reuven Rokah*

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