3 ms·
> sample decapsulating, milling die from the plastic package with CNC, then etching with 104 percents boiling oleum Then etching with... what?
by ThePowerOfFuet 7y ago
> sample decapsulating, milling die from the plastic package with CNC, then etching with 104 percents boiling oleum
Then etching with... what?
- kees99 7y agoOleum. Fuming sulfuric acid. https://en.wikipedia.org/wiki/Oleum https://en.wikipedia.org/wiki/Oleum
- wolfgang42 7y agoAnd apparently the percentage is strength relative to (non-fuming?) sulfuric acid (i.e. neat sulfuric acid without sulfur trioxide added) which is why it’s over 100%.