I wasn't implying that every piece of aluminum is coated with a thin
film of sapphire. I was just trying to express that "aluminum oxide is
very hard" in a jokey kind of way, not mislead anyone. The point is
that Al2O3 is harder than pure aluminum and has different properties
and that it *might* be contributing to the pnp not sticking.
film of sapphire. I was just trying to express that "aluminum oxide is
very hard" in a jokey kind of way, not mislead anyone. The point is
that Al2O3 is harder than pure aluminum and has different properties
and that it *might* be contributing to the pnp not sticking.