Joyce,
In our facility, as part of the 5S program, we have been measuring air
particle in the air; not sure how often but do know it's plant-wide. My
question pertains to if there is a specification somewhere that calls
out how much air particle in the air is acceptable, basically what you
said, Dust. We are not practicing a cleanroom environment, but most
information that I have came across, points to that kind of environment.
Your help would be greatly appreciated.
Thanks.
Mary Jane Chism
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joyce Koo
Sent: Monday, August 28, 2006 8:25 AM
To: [log in to unmask]
Subject: Re: [TN] Air Particle
She might be talking about environmental testing of dust that consists
of S, Cl, Na, all the juices...jk (be specific please)
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Dennis Fritz
Sent: Friday, August 25, 2006 10:26 PM
To: [log in to unmask]
Subject: Re: [TN] Air Particle
In a message dated 8/25/2006 5:57:37 P.M. Eastern Daylight Time,
[log in to unmask] writes:
I was wondering if anyone knew of a specification document that gives
the guidelines for "Air Particle" acceptable measurement for the
atmosphere of an electronic manufacturing facility.
The Institute of Environmental Science and Technology (IEST) sets up the
criteria and measurement methods to determine class 10, 100, 1000, etc.
Consult their web site and perhaps take one of their courses.
In addition, they have a fair amount of literature on required
cleanliness levels for various manufacturing operations, particularly
with regard to semiconductors.
The Technology subcommittee of the IPC Suppliers Council has been trying
to gather data on required cleanliness for various board fab operations
- lay-up of innerlayers for lamination, phototoool generation, resist
exposure, laser direct imaging, etc. Many shops use clean rooms, or
clean areas, but there is little yield data for the fab steps with and
without clean atmospheres.
I
have seen pretty good data for yeilds with clean rooms for laminate
manufacturers, but I don't know if this would translate to board shop
MLB lay-up.
Perhaps others will contribute to this thread, and pet project of Jack
Fisher on the IPC Suppliers Council will get off the ground.
Denny Fritz
MacDermid, Inc.
Member of IPC Suppliers Council Technology committee.
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