Precision Megasonic Cleaning for Silicon Carbide Wafers
Summary: Silicon carbide wafers present a cleaning problem that silicon never did: the surface features most sensitive to damage — gate oxides, epitaxial layers, deep trench structures — sit on a substrate harder than almost any other semiconductor material. Megasonic cleaning addresses this directly, delivering controlled acoustic energy precise enough to remove sub-micron contamination without mechanical stress […]
How Pre-Diffusion Cleans Prepare Wafers for Optimal Processing
Summary: Pre-diffusion cleans are critical wafer cleaning steps that remove surface contaminants before dopant diffusion processes, ensuring precise control over semiconductor device characteristics and maximizing manufacturing yield. Editor’s Note: This article was originally published in May 2018 and has been updated with additional information and reposted in October 2025. Table of Contents Introduction: Why Wafer Cleanliness […]
Achieve Cleaner Wafers with SPM Process Optimization
Summary: Discover how Modutek’s dual-tank SPM wafer cleaning process and advanced wet bench systems reduce costs, improve efficiency, and ensure cleaner wafers for semiconductor manufacturers. Editor’s Note: This article was originally published in March 2018 and has been updated with additional information and reposted in August 2025. Table of Contents Introduction: Why Efficiency Wafer Cleaning Matters. […]
Sustainable Practices in Semiconductor Manufacturing
Using sustainable practices with innovative technologies has become a critical priority in semiconductor manufacturing. The industry’s environmental footprint, driven by extensive resource use and waste generation, necessitates the adoption of eco-friendly practices. Semiconductor manufacturers and research facilities increasingly integrate sustainable methodologies such as waste reduction, energy efficiency, and the elimination of solvents to mitigate environmental […]
Using RCA Clean in a Wet Bench Process
Editor’s Note: This article was originally published in May 2015 and has been updated with new information and re-posted in August 2023. The semiconductor manufacturing industry relies heavily on complex and precise processes to create electronic components we rely on every day. One such process is wafer cleaning – an essential step that removes unwanted […]
How Piranha Etch is Used in Silicon Wafer Cleaning
Editor’s Note: This article was originally published in December 2016 and has been updated with additional information and reposted in March 2023. Silicon wafers are fabricated with repeated etching and cleaning steps to produce the micro-structures required for the final silicon semiconductor products. Piranha or SPM (sulfuric peroxide mix) solutions can clean organic material from […]
Why Pre-Diffusion Cleans Are Essential for Silicon Wafer Processing
Silicon wafers must be completely clean before they go through the diffusion process. If contaminating particles are present on the wafer surfaces during the diffusion process, they will cause defects in the final semiconductor product. Pre-diffusion cleaning can be carried out with several methods. RCA clean and Piranha etch use chemicals to strip away wafer […]
How Precise Control of the SPM Process Improves Processing Results
While the SPM (Sulfuric acid Peroxide Mix) or Piranha process quickly removes organic contaminants such as photoresist, it is difficult to control. The cleaning action depends on both the temperature and the concentration of the mixture. Both vary if the process is left to carry on without intervention. Better controls can improve cleaning performance, reliability, […]
How the Piranha Etch Process Improves Silicon Wafer Cleaning
While the Piranha solution quickly removes organic residue from silicon wafers, the process is difficult to control and may produce explosive gas mixtures. The Piranha solution is made up of one part hydrogen peroxide and three parts sulfuric acid, although the ratio may vary for specific applications. The mixture is exothermic and the heat released […]
How Megasonic Cleaning Improves Silicon Wafer Manufacturing
When silicon wafers are cleaned between manufacturing steps, it is critical to remove all contamination from the wafer surfaces. The remaining traces of process chemicals or microscopic particles can disrupt the etching process and result in defective or low-quality semiconductor devices. Megasonic cleaning uses high-frequency sound waves in the cleaning tank to remove contaminants and […]