Hello all,

I've just finished a product that uses a specialized dc/dc controller 
(designed for a wholly unrelated field) with some further tweaks to 
solve a particular thorny problem.

It took three major redesigns to get here, 100s of hours, etc.

But... it could be easily copied.  And can't be patented.

So... at the very least I'm going to (carefully) sand off the markings 
on the IC.

But it would be great to seal everything up as well.  Only the dc/dc 
section need be protected, there is no need to encapsulate everything. 
Ideally just a tablespoon of viscous goo poured over it.

Now I realize there are limits to what can be protected, the goal is to 
make it hard enough that casual poking around won't yield any clues. 
The product is a specialized enough thing that there aren't many 
companies in the business field that would be interested in it, so it 
doesn't need to withstand some concerted, well-equipped "attack".

Has anyone been in this situation before?

Any advice appreciated!
Thanks
Jesse
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