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SHENZHEN JINGHUI INDUSTRY LIMITED
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Product Description 96 Alumina Sheet Insulation Heat Dissipation Laser Scribing Ceramic SubstrateProduct IntroductionAlumina ceramic substrates have excellent electrical insulation properties, high thermal conductivity, high reliability, good high-frequency characteristics, and low thermal expansion coefficient. They have become the basic materials for high-power power electronic circuit structure technology and interconnection technology.Due to the hard and brittle characteristics of ceramic materials themselves, their processing is very difficult. Traditional mechanical processing methods are time-consuming and labor-intensive, and there is stress during the processing, which can easily damage the substrate. Laser, as a flexible, efficient, and high-yield processing method, has become one of the most ideal means of processing ceramic substrates today.Lasers are widely used in the scribing process of ceramic substrates after sintering. Scribing is to form lines by burning continuous and densely arranged dot-shaped pits on the surface of the ceramic by laser, so as to facilitate the packaging and division into independent small units. Product Applications Product Parameters Alumina Ceramic SubstrateItemUnit96% Al2O399.6% Al2O3Mechanical PropertiesColor//WhiteIvoryDensityDrainage Methodg/cm3≥3.70≥3.95Light Reflectivity400nm/1mm%9483Flexural StrengthThree Point BendingMPa>350>500Fracture ToughnessIndentation MethodMPa·m1/23.03.0Vickers HardnessLoad 4.9NGPa1416Young's ModulusStretching MethodGPa340300Water Absorption %00Camber/Length‰T≤0.3: ≤5‰, Others: ≤3‰≤3‰Thermal PropertiesMax. Service Temperature (Non-loading)/oC12001400CTE (Coefficient of Thermal Expansion)20-800oC1×10-6/oC7.87.9Thermal Conductivity25oCW/m·K>24>29Thermal Shock Resistance800oC≥10 TimesNo CrackNo CrackSpecific Heat25oCJ/kg·k750780Electrical PropertiesDielectric Constant25oC, 1MHz /9.49.8Dielectric Loss Angle25oC, 1MHz ×10-4≤3≤2Volume Resistivity25oCΩ·cm≥1014≥1014Dielectric StrengthDCKV/mm≥15≥15 Manufacturing Capacity1. Product Tolerances Alumina Ceramic SubstrateItemSubstrate Thickness (mm)Standard Tolerance (mm)Best Tolerance (mm)Laser Cutting Tolerance (mm)Length and Width Tolerance/±2 ±0.15Thickness ToleranceT<0.3±0.03±0.01 0.30-1.0±0.05±0.01 T>1.0±10%±0.01 2. Surface Roughness Alumina Ceramic SubstrateMaterialSurface Roughness (μm)As FiredLappedPolished96% Al2O3Ra 0.2-0.75Ra 0.3-0.7Ra ≤0.0599.6% Al2O3Ra 0.05-0.15Ra 0.1-0.5Ra ≤0.05FAQQ1: 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, just come to us.
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