96% 99.6% As Fired Blank Al2O3 Ceramic Substrate Alumina Plate
Features of the Alumina Ceramic Substrate
(1) Good insulation performance and high reliability.
(2) Low dielectric coefficient and good high frequency performance.
(3) Low thermal expansion coefficient (CTE) and high thermal conductivity.
(4) Good air tightness, stable chemical properties, and strong protection for electronic systems.
Applications
Product Parameters
| Alumina Ceramic Substrate |
| Item |
Unit |
96% Al2O3 |
99.6% Al2O3 |
| Mechanical Properties |
| Color |
/ |
/ |
White |
Ivory |
| Density |
Drainage Method |
g/cm3 |
≥3.70 |
≥3.95 |
| Light Reflectivity |
400nm/1mm |
% |
94 |
83 |
| Flexural Strength |
Three Point Bending |
MPa |
>350 |
>500 |
| Fracture Toughness |
Indentation Method |
MPa·m1/2 |
3.0 |
3.0 |
| Vickers Hardness |
Load 4.9N |
GPa |
14 |
16 |
| Young's Modulus |
Stretching Method |
GPa |
340 |
300 |
| Water Absorption |
|
% |
0 |
0 |
| Camber |
/ |
Length‰ |
T≤0.3: ≤5‰, Others: ≤3‰ |
≤3‰ |
| Thermal Properties |
| Max. Service Temperature (Non-loading) |
/ |
ºC |
1200 |
1400 |
CTE (Coefficient of
Thermal Expansion) |
20-800ºC |
1×10-6/ºC |
7.8 |
7.9 |
| Thermal Conductivity |
25ºC |
W/m·K |
>24 |
>29 |
| Thermal Shock Resistance |
800ºC |
≥10 Times |
No Crack |
No Crack |
| Specific Heat |
25ºC |
J/kg·k |
750 |
780 |
| Electrical Properties |
| Dielectric Constant |
25ºC, 1MHz |
/ |
9.4 |
9.8 |
| Dielectric Loss Angle |
25ºC, 1MHz |
×10-4 |
≤3 |
≤2 |
| Volume Resistivity |
25ºC |
Ω·cm |
≥1014 |
≥1014 |
| Dielectric Strength |
DC |
KV/mm |
≥15 |
≥15 |
Product Tolerances
| Alumina Ceramic Substrate |
| Item |
Substrate Thickness (mm) |
Standard Tolerance (mm) |
Best Tolerance (mm) |
Laser Cutting Tolerance (mm) |
| Length and Width Tolerance |
/ |
±2 |
|
±0.15 |
| Thickness Tolerance |
T<0.3 |
±0.03 |
±0.01 |
|
| 0.30-1.0 |
±0.05 |
±0.01 |
|
| T>1.0 |
±10% |
±0.01 |
|
Surface Roughness
| Alumina Ceramic Substrate |
| Material |
Surface Roughness (μm) |
| As Fired |
Lapped |
Polished |
| 96% Al2O3 |
Ra 0.2-0.75 |
Ra 0.3-0.7 |
Ra ≤0.05 |
| 99.6% Al2O3 |
Ra 0.05-0.15 |
Ra 0.1-0.5 |
Ra ≤0.05 |
Product Packaging
Because ceramics are hard and brittle materials, each of our products will be packed in a safe and reliable way to
avoid damage during transportation.
FAQ
Q1: Can the Size be Customized?
Yes, most of the alumina ceramic substrates are rectangular, square or round in shapes. Our rectangular shapes for as-fired alumina ceramic substrates are available up to 500mm×500mm. We offer customized products for special requirements.
Q2: What is the Maximum ServiceTemperature of the Alumina Ceramic Substrates?
Alumina ceramic substrates can withstand high temperature of 1200-1400 ºC.
Q3: What is the Minimum Thickness of the Alumina Ceramic Substrates?
Our standard thickness: 0.25mm, 0.30mm, 0.38mm, 0.50mm, 0.635mm, 0.76mm, 0.80mm, 0.89mm, 1.0mm, 1.5mm and 2.0mm. Minimum thickness to be 0.1mm. Welcome to inquire about customized services.
Q4: What is the Depth of the Laser Scribing?
The depth of the laser scribing of our ceramic substrate is about 35%-65% of the substrate thickness. The scribing spot can be in different sizes. Generally there are small spot 0.03-0.04mm (Substrate Thickness≤0.5mm ) and large spot 0.08-0.1mm (Substrate Thickness>0.5mm), and the accuracy is ±0.01mm.
Q5: Can Alumina Ceramic Substrates be Polished?
Yes, lapping and polishing will provide the desired flatness and thickness tolerance, with a surface roughness generally below Ra0.05.
Q6: What is the Camber of the Alumina Ceramic Substrates?
Our alumina substrates are 100% inspected for camber. The camber is less than 5‰ for 96% alumina with a thickness below 0.3mm. For 96% alumina with other thicknesses and for other purities, the camber is less than 3‰.
If your question is not listed here, please contact us for more information.
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