MoonMan,
use only qualified vendor only.  During vendor qual test, specify the
cleanliness must be less than 1.0 ug/cm2 with test data of x number of lots,
at most complexed coupon format.  No need to specify in each of the dwg.
Works well with SPC and ISO 9000....Hardly ever have problem until OEM and
vendor change ... or your MBA start to make few more cents for their salary
(either in your vendor side or your own back yard)...
my 2 cents.

jk ;-(

>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]]On Behalf Of Earl Moon
>Sent: Friday, August 09, 2002 12:14 AM
>To: [log in to unmask]
>Subject: Re: [TN] Board cleanliness
>
>
>Hell Bev, you need a little more fire and brimstone in your life. I take a
>bunch every morning for breakfast on my Cheerios, or is that Wheaties?
>
>If we want to go back a ways, the now defunct MIL-P-28809 said something
>like 2 megohms/cm, or something to that effect concerning assembled board
>cleanliness. Therefore, the axiom was use only DI water exceeding that
>requirement to ensure the cleanliness issue was resolved.
>
>I just want to know bare board cleanliness requirements now. I also would
>like to know how to make this information a requirements in my master
>drawing notes and what document to reference. That document doesn't seem to
>be 600 or 6012.
>
>Earl
>
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