Date : 13/5/96 9:56
Msg From: ATUL RASTOGI
Steve,
Keeping RH to less than 30% in your environment will lead to Static
charge build up.Better method will be to store components after
opening the seal either in a storage oven at a temp of 50 to 60 deg
C(if components are in trays) or in a dry cabinet at RH less than
20%(if components are in tape).This way components can be stored for
a long time without requiring baking.You should use opened components
within a limit ,as defined in IPC SM 786A, on your line or put them
in storage oven or dry cabinet.However you should ensure that total
exposure time does not exceed the limit otherwise you might have to
bake the components.
Atu Rastogi
Altos India Ltd
 >>>>>>>>>>>>>>>

Posted: Sat, May 11, 1996   2:07 AM                  Msg:
CJJG-2069-1466/20
From:   ("RFC-822": <TechNet-request(a)ipc.org>, SITE:INTERNET) 
To:     ("RFC-822": <steveq(a)heurikon.com>,SITE:INTERNET)
CC:     ("RFC-822": <TechNet(a)ipc.org>,SITE:INTERNET), 
        AIL.EHTP/PCL
Subj:   Re: Humidity Sensitive parts

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Steve:

I recommend that you refer to IPC-SM-786A, for specific handling 
issues. It does not, however, go into much detail about the broader
issue 
of the plant itself.

The 786A refers to MIL-STD-1686 for ESD control. Potential health
concerns 
(if any) could probably addressed in the IPC forum
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Mike Buetow
IPC Technical Staff
2215 Sanders Road
Northbrook, IL 60062
P: 847-509-9700, ext. 335
F: 847-509-9798
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On Thu, 9 May 1996, Steve Quinn wrote:


> Hello out there.
> 
>         We are looking into the handling of our humidity sensitive
parts.
> We currently keep them in their sealed bags, and reseal unused
parts
> immediately after a build(we build very low volumes of boards per
day).  We
> are considering controlling the environment in the room where we
build, and
> keeping the humidity under 30% to eliminate any moisture build up
in the
> parts.  Do I run into other problems, such as ESD issues, and how
can I deal
> with those?  Are there health concerns from running in too dry an
> environment?  Any comments would be appreciated.
>         Thanks.
> 
> Steve Quinn
> Heurikon Corp
> 
> 


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