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   TO:         I4235700 IBMMAIL   new address for ipc technet 25.6.96

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

   DATE:       9 July 1996
   SUBJECT:    HAST
   REFERENCE:  highly accelerated stress testing

    We performed HAST (highly accelerated stress testing) on product
    for a particular customer some years ago, which was designed to
    take the product to failure in order that failure modes could be
    analysed and product life determined. Does anyone out there
    recognise the term HAST, and if so could you provide details
    (non-proprietary) on what the testing involved. We are particularly
    interested in relation to the new types of circuit constructions
    with micro blind vias (SBU, laser drilled, Dyconex etc).

    Thankyou
    Dougal Stewart
    Product Development Manager
    Exacta Circuits
    Scotland

    tel +44 1750 21601
    fax +44 1750 22513
    e-mail [log in to unmask]

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