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Alumina ceramic substrate is a type of ceramic material commonly used in electronics, particularly in the manufacturing of integrated circuits (ICs), semiconductors, and other electronic components. Alumina ceramic, also known as aluminum oxide (Al2O3), offers several desirable properties that make it suitable for these applications
·High thermal conductivity
·Electrical insulation
·Chemical inertness
·Mechanical strength
·Dimensional stability
These properties make alumina ceramic substrates widely used in the fabrication of electronic circuit boards, especially in high-power and high-frequency applications where thermal management is critical. Additionally, alumina substrates are often used as a base material for mounting and packaging electronic components due to their excellent thermal and electrical properties.
| Alumina Ceramic Substrate Material Property | ||||
| 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 | 3 |
| 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) | 200-800ºC | 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 | ≥10^14 | ≥10^14 |
| Dielectric Strength | DC | KV/mm | ≥15 | ≥15 |
| Alumina Ceramic Substrate Surface roughness | |||
| 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 |
FAQ
Q1: What are the main applications of Alumina ceramic substrates?
Alumina ceramic substrates from Binzhou Aonuo New Material Technology Co., Ltd. are extensively used in the electronics industry, particularly in the production of circuit boards and electronic packages. These advanced substrates are also integral to the automotive, aerospace, and medical device sectors.
Q2: What are the advantages of using Alumina ceramic substrates?
Alumina ceramic substrates boast numerous benefits, including superior thermal conductivity, exceptional dielectric strength, and robust resistance to chemical corrosion. They also maintain dimensional stability across various operating conditions, making them a reliable choice for critical applications.
Q3: How is Alumina ceramic substrate manufactured?
The manufacturing process of Alumina ceramic substrates typically involves blending aluminum oxide powder with binders and additives to create a slurry. This slurry is then formed into the desired substrate shape using techniques such as tape casting, dry pressing, or extrusion. The shaped substrate is subsequently sintered at high temperatures to achieve its final, optimized properties.
Q4: What are the different types of Alumina ceramic substrates available?
Alumina ceramic substrates come in various types, defined by factors such as purity, grain size, surface finish, and dimensional tolerances. Common variants include high-purity Alumina (HPA) substrates, thick-film Alumina substrates, and metallized Alumina substrates designed for electronic applications.
Q5: What considerations should be made when selecting Alumina ceramic substrates?
When selecting Alumina ceramic substrates, it's crucial to consider elements like thermal conductivity, dielectric strength, surface roughness, dimensional precision, and compatibility with manufacturing processes to ensure optimal performance in specific applications.
Q6: Can Alumina ceramic substrates be customized for specific requirements?
Absolutely, Binzhou Aonuo New Material Technology Co., Ltd. offers customization services to meet specific customer requirements. These can include tailored dimensions, shapes, surface finishes, and metallization patterns to suit diverse applications.
Q7: What are some typical quality control measures for Alumina ceramic substrates?
Quality control for Alumina ceramic substrates involves stringent material testing for purity and consistency, dimensional inspections, surface roughness assessments, and comprehensive electrical testing to ensure compliance with specified performance standards.
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