That has nothing to do with preventing reverse engineering in this case, as far as I know. It’s a very cheap alternative to an integrated heat spreader.
It can be used for both reasons, but I don’t think they are that concerned with protecting against reverse engineering on chips that are probably decades old and easily purchasable
Dumb graphing calculators that have black anti reverse engeneering gunk spread all over their chips
That has nothing to do with preventing reverse engineering in this case, as far as I know. It’s a very cheap alternative to an integrated heat spreader.
https://blog.paryleneconformalcoating.com/potting-protects-against-reverse-engineering/
Til It seems to do both
It can be used for both reasons, but I don’t think they are that concerned with protecting against reverse engineering on chips that are probably decades old and easily purchasable