100dollarhackerLike method #9 but instead of making diy Nitric acid in epoxy pocket, heated materials in a beaker and apply it on the IC. Still there is crystal like residue formed.
I don't have a clue how to continue this project 😭
--------------------------------------------
OK, after watching some videos and asking forums I got my answer, my problem is using NOT concentrated nitric acid (duh!)
This video explains why it should work with highly concentrated nitric acid (AKA fuming nitric acid) is ok with copper bond wires. (TL'DR go to 4:05)
Well I am stuck! Buying fuming nitric acid (90%) is about 300$ for 100ml [above my budget for project 100$hacker is my name ;) ]. It's almost imposible to buy unless you are in USA. So sad ...
Discussions
Become a Hackaday.io Member
Create an account to leave a comment. Already have an account? Log In.