Strategies for Enhancing SiO₂ Chemical-Mechanical Polishing (CMP): Functional Nanoparticle Abrasive Design and...

Area of Science:

• Materials Science
• Chemical Engineering
• Semiconductor Manufacturing

Background:

• Continuous scaling of semiconductor devices increases demand for advanced chemical-mechanical polishing (CMP).
• Conventional abrasives in CMP slurries face limitations in material removal rates, surface roughness, defectivity, and selectivity.
• Next-generation slurries are needed for improved performance in semiconductor fabrication.

Purpose of the Study:

• To investigate the physicochemical properties of ceria-based and non-ceria-based nanoparticle abrasives.
• To critically examine recent advances in abrasive applications for silicon dioxide (SiO2) CMP.
• To understand how abrasive properties influence CMP performance through chemical and mechanical interactions.

Main Methods:

• Review of literature on ceria and non-ceria nanoparticle abrasives.
• Analysis of physicochemical properties relevant to CMP.
• Examination of abrasive structural design and chemical interactions.
• Evaluation of material removal rates, surface roughness, defectivity, and selectivity.

Main Results:

• Both ceria-based and non-ceria-based nanoparticles exhibit distinct physicochemical properties impacting SiO2 CMP.
• Understanding chemical interactions, mechanical properties, and structural design is key to abrasive performance enhancement.
• Current single-component abrasive systems show limitations for future semiconductor fabrication needs.

Conclusions:

• Overcoming limitations in current CMP slurry systems may necessitate a shift from single-component to composite abrasive systems.
• Engineering composite systems with complementary functionalities offers a practical approach for advanced CMP solutions.
• Integrated abrasive design strategies are crucial for developing reliable and effective CMP for future semiconductor manufacturing.