I recently commented on the effects of no-clean on our boards running 
     at 622MHz. If I mentioned conductive, I apologize. I meant to say 
     capacitive. The specific area affected on the board was a high 
     impedance analog circuit. The no-clean residue caused a leakage path 
     that acted like a capacitor. Hope this clears up some confusion.
     
     [log in to unmask]


______________________________ Reply Separator _________________________________
Subject: Re: Rf interference from No cleans (GEN/ASSY/DES)
Author:  [log in to unmask] at INTERNET
Date:    5/1/97 4:24 PM


Our assemblies operate as high as 12 GHz with no problems over the last 
five years of no clean assembly.
     
Phil
-----
     
     
At 12:07 PM -0400 4/30/97, Brian Bauer wrote: 
>Hello,
>
>Does anyone have any information on the effect of no clean residues on RF. 
>I am interested at what frequency interference begins (if any) and what typ= 
e
>of device you are talking about ie. phine, radio etc..  I am interested in 
>both PCB and Hybrid Thick Film (alumnia) applications. Also, is anyone usin= 
g
>no cleans in the Gigahertz level - if so what level? 
>
>Thanks
>
>Brian
>
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