Juanita Zeinstra wrote:
>
>      We are located in Grand Rapids Michigan.  We are moving across town to
>      a new building which is being renovated to suit our needs.  With a
>      tight budget getting tighter, there is a somewhat political and
>      emotional contest in the making.
>
>      By title our assembly facility will be called the "Engineering
>      Manufacturing Development Center (EMDC)".  Engineering activity is
>      located in Grand Rapids, Mi. while production manufacturing will be
>      located in Clearwater, Fla.  The EMDC will have process development,
>      low volume and transition responsibilities.
>
>      We assemble primarily SMT boards but there is some thru-hole and mixed
>      technology as well.  Processing in the EMDC includes wave, vapor
>      phase, and hand soldering.  IR, convection ovens or even new technolgy
>      soldering may be added later, as well.  Our boards are primarily rigid
>      polyimide boards but flex and rigid-flex boards are processed
>      occasionally.  Thermount boards are being considered for the future.
>      Cu-Invar-Cu and Cu-Mo-Cu stabilizing cores are frequently employed for
>      CTE stabilization.
>
>      We will be using more and more plastic and commercial parts and less
>      of the ceramic and military grade parts, as is the industry trend.  It
>      also goes without saying that expect to track industry trends in
>      technology, components and processing.
>
>      We are in the business for the long term.  We started our operations
>      in GR in the early 1950's and we will have a 20 year lease on our new
>      facility.  Our business niche is high technology commercial and
>      military avionics.  Our facility size is almost 900,000 Sq.Ft. and the
>      EMDC and circuit card assembly areas could be as large as 15K-25K Sq.
>      Ft. in size.
>
>      With that as background, the question is as follows;
>
>      What temperature / humidity requirements would you recommend for
>      the EMDC and assembly areas of our new facility?
>
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If your process development is principally for your Florida facility,
then you should specify the same temperature/humidity controls.

Phil Dudley

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