Tkx guys, you've been very helpfull.
melc said:
The best option. One ideea is to use a thin glass (0.5mm maximum thin) and the IC imersed in oil. As small oil quantity (a recipient which IC dimension will fit inside) as small thermal inertia. Silicone vaseline instead oil as well.
Kitchen oil will do?
Kitchen oil is not very good because in time will smell ugly (and looks ugly) because of oxidation
The biggest problem is to find a small glass case to put the IC in.
There are some 3-4mm diameter glass tubes for chemical purposes. If you'll melt one end in a fire (a real fire with oxigen) become what you need
One more thing, is it better the IC package to be SMD type or DIP type for this purpose? I have both thats why I'm asking