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This DIY home semiconductor manufacturer: https://www.instructables.com/id/Home-Semiconductor-Manufacturing/ https://www.instructables.com/id/Home-Semiconductor

This DIY home semiconductor manufacturer: https://www.instructables.com/id/Home-Semiconductor-Manufacturing/ https://www.instructables.com/id/Home-Semiconductor-Manufact... used a rust stain remover which is 2% hydrofluoric acid. I am amazed that they sell such ridiculously dangerous chemicals to the general public!

AnthonyMouse 8y ago
> I am amazed that they sell such ridiculously dangerous chemicals to the general public! HF is a very simple compound that anyone who knows what they're doing could produce on their own. Restricting access to such things is inherently worse than providing it, because anyone who doesn't know what they're doing could attempt to produce it themselves. Then in the best case they end up with the acid regardless and in the worst case they get the concentration wrong or produce who knows what other compound by mistake that may or may not eat through the container they're holding it it, fill the room with poison gas or cause a large fire or explosion.
blackoil 8y ago
How else will you make body barrels?
- XorNot 8y ago
  Fun fact, Breaking Bad very carefully gets all the science in the crime wrong in subtle ways.
gdpgreg 8y ago
If anyone is planning on following this, make sure to read up about how to properly handle HF before you touch it. That shit is time delayed death in a bottle, and make sure to get a tube or two of HF antidote, the author doesn't discuss the very strong dangers associated with it.
philipkglass 8y ago
Counterintuitively, chemicals with high reactivity and high acute toxicity like HF are usually not the cause of semiconductor Superfund sites. The most common problem is chlorinated solvents used for cleaning. Trichloroethylene is a lot safer to spill on yourself than HF, but the hazards of TCE endure much longer than those of HF when it gets down into the water table. I don't know if modern fabs have mostly switched to less environmentally persistent solvents or if they're just a lot more careful about not discharging solvents to the environment.

AnthonyMouse 8y ago

> I am amazed that they sell such ridiculously dangerous chemicals to the general public! HF is a very simple compound that anyone who knows what they're doing could produce on their own. Restricting access to such things is inherently worse than providing it, because anyone who doesn't know what they're doing could attempt to produce it themselves. Then in the best case they end up with the acid regardless and in the worst case they get the concentration wrong or produce who knows what other compound by mistake that may or may not eat through the container they're holding it it, fill the room with poison gas or cause a large fire or explosion.

blackoil 8y ago

How else will you make body barrels?

XorNot 8y ago
Fun fact, Breaking Bad very carefully gets all the science in the crime wrong in subtle ways.

gdpgreg 8y ago

If anyone is planning on following this, make sure to read up about how to properly handle HF before you touch it. That shit is time delayed death in a bottle, and make sure to get a tube or two of HF antidote, the author doesn't discuss the very strong dangers associated with it.

philipkglass 8y ago

Counterintuitively, chemicals with high reactivity and high acute toxicity like HF are usually not the cause of semiconductor Superfund sites. The most common problem is chlorinated solvents used for cleaning. Trichloroethylene is a lot safer to spill on yourself than HF, but the hazards of TCE endure much longer than those of HF when it gets down into the water table. I don't know if modern fabs have mostly switched to less environmentally persistent solvents or if they're just a lot more careful about not discharging solvents to the environment.