On Thu, 11 Apr 2002 05:46:40 -0500, Matt Kehoe <[log in to unmask]> wrote:

>Short shelf life is relative. We have documented the shelf life of SIPAD
>boards of up to 14 months. We also have many samples that are more than 2
>years old, have been stored in less than ideal conditions, (in my breif
>case, car trunk etc), and they are still very tacky. Also, if for some
>reason they do dry out, they can be cleaned and re-fluxed.
>
>As far as a stacker is concerned, SIPAD boards were used in the Easi line
>at the Assembly Technology Expo one year, with a stacker system that was
>very clever. The boards were placed into the stacker paper side down. A
>suction cup handler picked up the board, placed it on the conveyor where
>it was carried over a small air knife that blew off the paper, dropping it
>into a box underneath. The board transported into an inverter where it was
>flipped, tacky side up now, and sent into the pick and place machine.
>
>We have access to this equipment if you are interested.
>
>mk
>
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