🚀 go-pugleaf

In article <1h3dv3INN53h@rave.larc.nasa.gov> kludge@grissom.larc.nasa.gov (Scott Dorsey) writes:
>In article <BzJExG.40D@zoo.toronto.edu> henry@zoo.toronto.edu (Henry Spencer) writes:
>>Apart from the possibility of deducing the chip type by studying the rest
>>of the circuit, the only way to find out is to get the epoxy off.  That
>>is Not Easy.  The stuff is completely inert as far as the usual run of
>>solvents etc. are concerned.  It can be done, using truly vile chemicals,
>>but it's not the sort of thing you want to try unless you really know
>>what you're doing.
>
>You can do it with DMSO.  I have reverse-engineered a number of potted
>modules by soaking them in DMSO.  Note that DMSO will also remove the
>epoxy board underneath if you aren't very careful about it, and will also
>(in the case of more complex modules) remove the coating from resistors
>and capacitors making them difficult to read values from.

What's DMSO? (I wan't to say dimethylsulfoxide, but I'm just guessing from 
a small inventory of knowledge)


>
>DMSO is readily available at your local health food store.  Note that the
>solution of epoxy in DMSO is lethal and can be absorbed through the skin.
>Use with proper ventilation, eye and skin protection.  Very, very nasty
>stuff.

Can you be more precise? Does th epoxy, DMSO stuff have a MSDS (material
safety data sheet, I don't know what OSHA in USA calls it)

>--scott


-- 
__________________________________________________________________________
 John Paul Morrison                     |  
 University of British Columbia, Canada |  
 Electrical Engineering                 |   .sig file without a cause
 jmorriso@ee.ubc.ca              VE7JPM |  
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