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February 2004

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Subject:
Re: Facility Humidity control
From:
David Douthit <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 4 Feb 2004 17:05:52 -0700
Content-Type:
text/plain
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text/plain (53 lines) 
Peter,

The general rule of thumb is to maintain rH between 30% and 50%.

Below 30% there are ESD issues. Above 50% there are
contamination/corrosion issues.

David A. Douthit
Manager
LoCan LLC

Peter L. wrote:

>Technet,
>
>What is the typical humidity/ temperture (nominal and +/-) for a CEM
>production environment?
>
>Is there an industry "acceptable" range?
>
>We are located here in the west coast and have seen relative humidity level
>varied from low 30s% (winter) to high 60s in the summer. Under what
>conditions should a HVAC control system be introduced and without that,
>what would be the potential impact on the overall manufacturing process?
>
>
>Rgds,
>Peter
>
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