Customization: | Available |
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Application: | Electronic Devices, Lighting, Power Supply, Semiconductors, Refractory, Structure Ceramic, Industrial Ceramic, Functional Ceramic |
Material: | Alumina Ceramic |
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Alumina ceramic is one of the most cost effective and widely used substrate materials in microelectronic applications. The substrates offer excellent electrical insulating properties, mechanical strength, good thermal conductivity, chemical durability and dimensional stability.
Material Properties Alumina Ceramic Substrates
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 |
1. Our bare ceramic substrates are available in a wide variety of standard and custom thickness, shape, and size.
(1) The standard thickness of the alumina ceramic substrate is 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.
(2) Our rectangular shapes for as-fired alumina ceramic substrates are available up to 500mm×500mm.
2. For products that require high dimensional accuracy, we can use various processing methods to process ceramic substrates, such as lapping, polishing, laser scribing, laser cutting, etc.
Alumina Ceramic Substrate | |
Hole Diameter (mm) | Standard Tolerance (mm) |
φ≤0.5 | 0.08 |
φ>0.5 | 0.2 |
Alumina Ceramic Substrate | |
Substrate Thickness (mm) | the Percentage of Laser Scribe Line Depth to Thickness (%) |
0.2-0.3 | 40%±5% |
0.3<T≤0.5 | 50%±3% |
0.5<T≤1.0 | 43%±3% |
1.2 | 55%±3% |
1.5 | 55%±3% |
2.0 | 55%+10% |
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. |
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.