Quartz crystal microbalance-based system for high-sensitivity differential sputter yield measurements.

Area of Science:

• Materials Science
• Surface Science
• Physics

Background:

• Sputtering is a key process in thin film deposition and surface modification.
• Accurate measurement of sputter yields is crucial for understanding material-target interactions under ion bombardment.

Purpose of the Study:

• To develop and validate a high-sensitivity quartz crystal microbalance (QCM)-based system for differential sputter yield measurements.
• To investigate sputter yields of various materials under a range of ion energies and incidence angles.

Main Methods:

• Utilized a QCM system for precise, real-time monitoring of mass changes during ion bombardment.
• Employed a four-grid ion optics system for low-energy (<100 eV) collimated ion beams and a two-grid system for higher energies (up to 750 eV).
• Integrated differential sputter yields to determine total yields and used a complementary weight loss method for validation.

Main Results:

• Demonstrated high sensitivity and accuracy in measuring differential sputter yields.
• Successfully characterized sputter yields for different target materials under specified ion beam conditions (30-350 eV, 0-70° incidence).

Conclusions:

• The QCM-based system provides a reliable and sensitive method for sputter yield analysis.
• The integrated approach allows for comprehensive understanding of material erosion dynamics under ion bombardment.