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Thats for starting the conversation. I have been trying to find time to look into SIR. Is it considered an alternative to ionic cleanliness? If so, is there any correlation to ug/sq. cm. We have some medical implant customers, that are concerned about any conductive surface contaminate.

What other benefits are available with SIR?

>>> [log in to unmask] 04/27/01 10:17AM >>>
OK, let's see what I can stir up today. :)

I am looking for a clear, succinct definition of surface insulation
resistance. If I look in IPC-9201 "Surface Insulation Resistance Handbook",
I don't find what I am looking for. (Sorry, Joe, Doug et al). What I find
on page 2, section 2.1, Definitions is the following: "It represents the
electrical resistance between two electrical conductors separated by some
dielectric material(s). This property is loosely based on the concept of
sheet resistance, (see ASTM-D-263), but also contains elements of bulk
conductivity, leakage through electrolytic contaminants, multiple dielectric
and metallization materials and air." Whew!

Any takers? Hmmm?

regards,
Bev Christian
Research in Motion

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