High-Purity Alumina Substrate (99.5% Alumina)

With an alumina purity of 99.5% or higher, this ceramic substrate offers exceptional surface smoothness, making it ideal for fine-pitch wiring patterns and thin-film circuit formation. It also provides outstanding electrical insulation, high heat resistance, and high mechanical strength. These properties make it suitable for demanding applications such as power devices, automotive components, LED lighting, and various electronic devices requiring insulated heat-dissipation substrates.

Features

With a high alumina purity of 99.5% and minimal internal porosity, this substrate offers excellent electrical properties and mechanical strength. It features high dielectric breakdown voltage, high volume resistivity, and low dielectric loss, making it well-suited for high-frequency applications. Its high flexural strength allows for thin substrates that resist cracking, providing excellent handling. The fine particle structure ensures a smooth surface, ideal for fine circuit formation and coating. Even under high-temperature conditions, its physical and chemical properties remain stable, and with a thermal expansion coefficient close to silicon, it also offers superior thermal conductivity.

Material Characteristics

ITEMUNITTEST
CONDITIONS
99.5% Alumina Substrate96% Alumina Substrate
NA-995NA-96
MATERIAL99.5%Al2O396%Al2O3
COLORWHITEWHITE
DENSITYg/cm33.93.7
WATER ABSORPTION%00
MECHANICAL PROPERTIES3 POINT BENDING STRENGTHMPa450400
SURFACE ROUGHNESS Raμm0.10.3
THERMAL
PROPERTIES
THERMAL
EXPANSION COEFFICIENT
10-6/℃RT~400℃6.26.8
RT~800℃7.57.8
THERMAL
CONDUCTIVITY
W/(m・K)20℃3223
ELECTRICAL PROPERTIESDIELECTRIC
CONSTANT
1MHz9.2
10GHz9.8
DIELECTRICTANGENT1MHz10×10-4
10GHz3×10-5
VOLUME RESISTIVITYΩ・cm25℃>1014>1014
WITHSTANDING VOLTAGEkV/mm>20>20
※Values are typical, not guaranteed

Design Guidelines

ITEMUNITSTANDARD PROCESSED
DIMENSIONSmm170×170
THICKNESSmm0.25~1.0
※Please inquire about designs other than those mentioned above

Catalog Download

Product Use Cases

  • Thin-Film Fine-Pitch Wiring Substrate
  • Plasma Generation Equipment
  • Chip Resistors