CVD Diamond Films on SiC for CMP Pad Conditioners

March10, 2026

At Diasemi, we leverage advanced Chemical Vapor Deposition (CVD) diamond technology to develop high-performance CMP pad conditioners for next-generation semiconductor manufacturing. As device nodes continue to shrink, CMP processes demand increasingly stringent requirements for pad conditioning materials, including extreme hardness, superior wear resistance, chemical stability, and ultra-low metal contamination.

Our CVD diamond films deposited on silicon carbide (SiC) substrates provide an ideal solution for these challenges. Compared with traditional diamond particle dressers, CVD diamond coatings offer high structural uniformity, controlled surface morphology, and improved durability, enabling more stable and repeatable pad conditioning.

SiC substrates offer excellent compatibility with diamond films due to their similar lattice structure and closer thermal expansion coefficient, which significantly reduces residual stress at the film–substrate interface. This results in strong interfacial bonding strength exceeding 40 N critical load, ensuring reliable operation under demanding CMP conditions.

Through precise control of the CVD process parameters, Diasemi can tailor the surface roughness and grain structure of diamond films to optimize friction behavior and wear performance. Studies show that diamond films with controlled nanoscale roughness can achieve stable friction coefficients (0.2–0.5) under wet CMP environments while maintaining excellent durability.

Optimized diamond films also demonstrate high pad conditioning efficiency, enabling effective restoration of pad porosity while minimizing mechanical damage. This balance between adhesive wear and controlled abrasive interaction is essential for maintaining stable CMP removal rates and consistent wafer surface quality.

By combining SiC substrate engineering with high-quality CVD diamond coatings, Diasemi’s CMP pad conditioner technology delivers:

High bonding strength and structural stability
Excellent wear resistance and long service life
Low contamination suitable for advanced semiconductor nodes
Tunable surface roughness for optimized conditioning performance

These advantages position Diasemi’s CVD diamond-on-SiC solutions as a next-generation platform for high-precision CMP processes in advanced semiconductor manufacturing.

CVD Diamond Films on SiC for CMP Pad Conditioners