PeterH wrote:
> 
> On Mar 14, 2009, at 2:01 PM, Charles Davis wrote:
> 
>> The 'Electrically conductive' being a problem is NOT between the
>> processor & heat sink, it's the problem caused by 'excess conductive
>> paste' oozing onto circuit traces adjacent to the processor, and
>> shorting various signals and/or power traces.
>> I.E. "Sloppy application"

Whatever "stuff" you are applying, you don't want any excess amount 
falling anywhere.  That is why you apply a very tiny amount and let the 
pressure moosh it into place.

> 
> With over-application of Arctic Silver, for example, to a G4, there  
> are power decoupling lines on the surface of the chip which can be  
> shorted-out by such oozing.
> 
> The "washer" which Apple generally applies to its processors can  
> limit the intrusion of the conductive paste to those lines.
> 
> However, over-application will usually get underneath the "washer"  
> and be resistant to attempts to remove it.
> 
> If you over-apply Arctic Silver, you are asking for trouble.
> 
> If you over-apply silicone thermal "grease", there is no issue except  
> for the mess.
> 
> Pine-SolĀ®, applied full-strength, can dissolve most such "greases".
> 
> And, as Pine-Sol is water-soluble, the excess "grease", then in  
> suspension, will simply, and completely wash-off.




-- 
Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting

"I'm a designated driver on the Information Super Highway"

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