Piranha Etch

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About this Process
Process Details
Equipment Piranha Etch
Technology [[]]
Chemicals Used Sulfuric Acid, Hydrogen Peroxide
Date Created 5/12/15
Date Modified 5/12/15
Authored By Rob Hower

Piranha is a heated strongly oxidizing mixture of sulfuric acid and hydrogen peroxide used to remove organic material from the surface of samples.




When the two chemicals are mixed a very exothermic reaction will occur. It will heat to 120-150C almost instantly. This is hot enough to soften many plastics, including the deck of the benches.

Etch Rate

Will clean organic residue off of wafer in approximately 10-20 min


Will attack any polymers on the surface