Ideal Vacuum Circular Magnetron Sputtering Targets, HAFNIUM DIOXIDE - HfO₂ Sputtering Target, 3'' Diameter x 0.25" Thick, 99.99 Percent Purity - White, Metallic Bonded to a 0.125" OFHC Copper Backing Plate

This product is a circular magnetron HfO₂ sputtering target, with a 3'' diameter x 0.25" thickness. It is 99.99% pure, and is metallically bonded to a 0.125" OFHC (Oxygen-Free High Conductivity) copper backing plate

We use a very competitive pricing strategy to ensure you receive the highest quality products at the best possible value, giving you both affordability and excellence in every purchase. We offer huge discounts to every customer, customers who place bulk orders will enjoy huge savings. We stock huge quantities of our products to give our customers guaranteed same day shipping after placing an order. This short lead time is loved by all our customers who look to manage their cash flow with quicker turnaround times. Our regular customers can maintain lower inventory levels, decreasing storage costs and minimizing the risk of obsolescence. Buying from Ideal Vacuum means a customer receives their product more quickly, enhancing satisfaction and meeting their urgent needs. This also enables our customers to stay ahead of their competition by quickly adapting to new trends and demands.

Hafnium Oxide (HfO₂)
Properties
Appearance: Transparent to slightly off-white in bulk; clear in thin films

Density: ~9.68 g/cm³ (high for an oxide)

Crystal Structure: Monoclinic at room temperature; can be stabilized in tetragonal or cubic phases at high temperature or with dopants

Melting Point: ~2758 °C (excellent thermal stability)

Thermal Conductivity: ~1.1–1.2 W/m·K (low, retains heat)

Electrical Properties: Wide bandgap (~5.3–5.8 eV), very high resistivity (>10¹4 O·cm)

Refractive Index: ~2.0–2.2 in the visible spectrum (high-index material)

Chemical Stability: Chemically inert and corrosion-resistant; stable in oxidizing environments

Usage in Thin Films

HfO2 is a high-performance dielectric and optical material widely deposited using RF magnetron sputtering or pulsed DC sputtering in PVD systems. Its combination of high refractive index, wide bandgap, and thermal stability makes it suitable for advanced optical, electronic, and protective applications.

Key Applications:

Optical Coatings: High-index layers in anti-reflective coatings, interference filters, laser optics, and mirrors

Microelectronics: High-k dielectric in MOSFET gates, DRAM capacitors, and insulating barriers

Protective Coatings: Scratch-resistant and corrosion-protective layers for optics and sensors

Thermal & Radiation Barriers: Due to high melting point and stability in harsh environments

Photonic Devices: Waveguides, resonators, and integrated optical circuits requiring high-index contrast

Notes:
Metallic or elastomer backing plate bonding is recommended for all dielectric target materials because these materials have characteristics which are not amenable to sputtering, such as, brittleness and low thermal conductivity. These targets are most susceptible to thermal shock due to their low thermal conductivity and hence, may require specific power ramp up and ramp down procedures during start up and shut down steps.