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   TO:         I4235700 IBMMAIL   IBM Mail exchange

   FROM:       DSTEWART EX2       D.Stewart        - Product Development Manager.

   DATE:       22 August 1996
   SUBJECT:    FAB: DATE CODES

    Re-date codes

    John,

    Apologies for the long delay between question and answer, but it
    takes a long time to clear your email after a 2 week break, and I
    didn't want to miss anything!

    We use lazy 8's (Clear on black) for date codes plotted onto the
    artwork. At the exposure stage you just use a water soluble pen to
    block out the parts you don't want, and wash the ink off after the
    batch. Very simple, very effective and it doesn't affect your
    artwork height from the board which is what is giving your
    localised track reduction.

    eg 9634 = |?| |?  ?| | |
               ?| |?| ?|  ?|
               ?   ?  ?
    hope this helps

    Dougal Stewart
    Exacta Circuits
    Scotland

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