Zirconia Toughened Alumina Substrate has special characteristics of high strength, high toughness, and high reflectivity, and can withstand severe thermal shock tests.
It is applicable to high power electronic component application materials.
． Its strength is more than twice that of general alumina substrates.
． Higher reflectivity than general alumina substrates and aluminum substrates.
． It can withstand severe thermal shock tests.
． Excellent stability under high temperature environment.
． Excellent substrate surface quality.
ZTA Substrates are used in:
． Substrates for high-power power modules, such as IGBT module substrate.
． LED module substrate.
． DBC or DPC metalized reworked substrate.
． Automotive power module substrate.
． Sensor module substrate.
． High chemical purity.
． Uniform powder grain size.
． Stable α phase alumina.
． Stabilized monoclinic/tetragonal zirconia.
． Highly homogeneous mixture and dispersion.
| Item | Material | ZTA | |
|---|---|---|---|
| Appearance color | - | White | |
| Density | g /cm3 | 4.0 | |
| Thermal Characteristics | Thermal conductivity | W/mK | 24 |
| Thermal Expansion Coefficient | RT ~ 300℃ (×10-6/℃) | 6.12 | |
| RT ~ 500℃ (×10-6/℃) | 7.04 | ||
| Electrical property | Dielectric Strength | V/m | >15 |
| Resistivity | Ω·cm | >1014 | |
| Dielectric Constant | 1 MHz | 12.4 | |
| Dielectric Loss Angle | 1 MHz (×10-3) | 8 | |
| Mechanical Characteristics | Bending strength | MPa | >600 |
| Item | Standard Product | Customized Product |
|---|---|---|
| Dimension | Maximum of 7.5” * 5.5” | Maximum of 4.5” * 4.5” |
| Thickness | as-fired 0.25mm, 0.32mm | as-fired 0.06 ~ 0.50 mm |
| Dimension Tolerance | ± 1% NLT ± 0.1mm | ± 0.05% NLT ± 0.1mm |
| Thickness Tolerance | ± 10% | ± 10% |
| Warpage | ≤ 0.003mm/mm | ≤ 0.008mm/mm |
| Surface Roughness | 0.3µm MAX. | 0.3µm MAX. |