What Oxidation Is Used To Prepare The Chemical Referred To A

What Oxidizer Is Used To Prepare The Chemical Referred Toas Piranha

Identify the oxidizer used in the preparation of piranha solution in the computer-chip industry. The options include potassium superoxide, hydrogen peroxide, peroxydisulfuric acid, and sodium persulfate.

Answer: The oxidizer used to prepare piranha solution is hydrogen peroxide. Piranha solution is a mixture of sulfuric acid and hydrogen peroxide, commonly used in semiconductor manufacturing for cleaning silicon wafers. Hydrogen peroxide acts as a powerful oxidizing agent, enabling the rapid removal of organic residues and contaminants from the surface of wafers. The typical preparation involves carefully mixing hydrogen peroxide with sulfuric acid, carefully controlling the temperature and concentrations to ensure safety and effectiveness. The strong oxidizing properties of hydrogen peroxide facilitate the formation of a highly reactive mixture capable of oxidizing organic compounds efficiently, which is critical in the cleaning processes of sensitive electronic components in the semiconductor industry.

Paper For Above instruction

In the semiconductor manufacturing industry, particularly in the cleaning and preparation of silicon wafers, piranha solution plays a vital role. The solution is renowned for its effectiveness in removing organic residues and other contaminants that may impair the performance of microelectronic devices. A key component of piranha solution is hydrogen peroxide, a strong oxidizing agent. This chemical, when combined with sulfuric acid, creates a highly reactive mixture that can efficiently oxidize organic materials on the wafer surface.

Hydrogen peroxide (H₂O₂) is commercially available in various concentrations, commonly in 30% or higher aqueous solutions. Its use in piranha solution exploits its strong oxidizing power, which results in the rapid breakdown of organic contaminants into benign byproducts like carbon dioxide and water. The process involves caution, as the mixture is highly reactive and can generate heat and oxygen, posing safety hazards if not handled properly.

Historically, hydrogen peroxide's role in piranha solution was established because of its capacity to produce reactive oxygen species, essential for cleaning semiconductor wafers without causing damage to the delicate silicon surfaces. In industry practices, the preparation involves slowly adding hydrogen peroxide to sulfuric acid at low temperatures to control the exothermic reaction, ensuring safety and efficacy. Overall, hydrogen peroxide remains the oxidizer of choice in the preparation of piranha solution for its unmatched ability to oxidize organic impurities effectively while being relatively manageable with proper safety protocols.

References

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