Thick Film Substrate Materials
Thick film substrates are made from high-quality ceramic materials. Ceramics include:
Alumina (Al2O3):
Most commonly used substrate. Good thermal conductivity, most economical material.
- 96% to 99.6%
- 0.010” to 0.080” thickness
- Area up to 4.5” x 4.5”
Aluminum Nitride (AlN)
Better thermal conductivity than alumina.
- 0.020” to 0.040” thickness
- Area up to 4” x 4”
Berrylium Oxide (BeO)
Best thermal conductivity. Conducts heat almost as well as copper
- 99% BeO
- 0.015” to 0.080” thickness
- Area up to 4” x 4”