Used For Making Chip Resistors 99.6% Alumina Ceramic Substrate
11 month ago
99.6% Alumina Ceramic Substrate for Chip Resistor Manufacturing
Puwei's 99.6% Alumina Ceramic Substrate represents the gold standard in precision electronic substrates for chip resistor manufacturing. Engineered with ultra-high purity alumina content, these substrates deliver exceptional electrical insulation, thermal stability, and mechanical strength required for advanced Electronic Packaging and Microelectronics Packaging applications.
With volume resistivity exceeding 10¹⁴ Ω·cm and a stable dielectric constant of 9-10, our alumina ceramic substrates provide the ideal foundation for precision chip resistors in demanding electronic environments.
Technical Specifications
Electrical Properties
- Volume Resistivity: >10¹⁴ Ω·cm
- Dielectric Constant: 9-10 @ 1 MHz
- Dielectric Strength: 15-25 kV/mm
- Insulation Resistance: Excellent electrical isolation properties
Material Composition
- Alumina Content: 99.6% Al₂O₃
- Impurity Control: Strictly controlled silica (SiO₂), iron oxide (Fe₂O₃)
- Density: 3.8-3.9 g/cm³
- Surface Finish: Precision lapped and polished surfaces
Physical Properties
- Thermal Conductivity: 20-30 W/m·K
- Thermal Expansion: 7.2-8.0 × 10⁻⁶/°C
- Flexural Strength: 300-400 MPa
- Hardness: HV 1500-1700
Product Visualization
High-purity 99.6% Alumina Ceramic Substrate for precision chip resistors
Advanced alumina substrates for electronic component manufacturing
Product Features & Advantages
Exceptional Electrical Insulation
Volume resistivity exceeding 10¹⁴ Ω·cm ensures complete current isolation between circuit elements, preventing leakage and maintaining signal integrity in sensitive electronic applications.
Stable Dielectric Properties
Consistent dielectric constant of 9-10 provides reliable capacitance characteristics, essential for precision Thick Film Resistor performance and signal stability.
Ultra-High Purity Composition
99.6% alumina content with controlled impurities ensures consistent electrical and thermal properties, eliminating performance variations in high-volume production.
Superior Thermal Management
Excellent thermal conductivity (20-30 W/m·K) efficiently dissipates heat from Power Devices, extending component lifespan and reliability.
Precision Surface Quality
Optimized surface finish enables accurate resistor patterning and reliable performance in miniaturized electronic components.
Mechanical Durability
High flexural strength (300-400 MPa) and hardness ensure dimensional stability and resistance to processing stresses during manufacturing.
Application Scenarios
Precision Chip Resistors
Ideal substrate for manufacturing high-precision chip resistors with tight tolerance requirements, from low-resistance (few ohms) to high-resistance (mega-ohms) applications.
High-Frequency Electronic Circuits
Essential for RF circuits and wireless communication devices where stable dielectric properties minimize signal loss and maintain impedance characteristics.
Miniaturized Electronic Devices
Supports the trend toward smaller components in mobile phones, tablets, and portable electronics through excellent mechanical strength in compact form factors.
Automotive Electronics
Reliable performance in automotive control systems, sensor interfaces, and power management circuits requiring stable electrical characteristics under varying conditions.
Industrial Control Systems
Durable substrate solution for industrial automation, measurement equipment, and control systems where long-term reliability is critical.
Benefits for Electronics Manufacturers
- Enhanced Product Reliability
Consistent electrical properties and excellent insulation ensure stable resistor performance and reduced failure rates
- Improved Manufacturing Yield
Precision surface quality and dimensional stability enable higher production yields and reduced scrap rates
- Extended Component Lifespan
Superior thermal management properties prevent overheating and extend the operational life of electronic components
- Design Flexibility
Supports miniaturization trends and enables development of smaller, more efficient electronic devices
- Cost Efficiency
High reliability and manufacturing consistency reduce total cost of ownership through fewer field failures and warranty claims
Certifications & Quality Assurance
Puwei Ceramic maintains the highest quality standards with comprehensive certification and rigorous quality control processes for electronic-grade ceramic substrates.
Quality Management
- ISO 9001 Certified Quality Management System
- RoHS and REACH Compliance for environmental safety
- Comprehensive material traceability and batch control
- Statistical process control for dimensional consistency
- Advanced metrology for precision verification
Manufacturing Process
- Raw Material Selection
High-purity alumina powder (99.6% Al₂O₃) is carefully selected and tested for electronic-grade applications
- Precision Forming
Advanced pressing techniques create substrate preforms with accurate dimensions and uniform density distribution
- High-Temperature Sintering
Controlled atmosphere sintering at elevated temperatures achieves optimal density and develops required electrical properties
- Precision Machining
CNC grinding and lapping operations establish exact dimensional accuracy and surface finish specifications
- Quality Verification
Comprehensive testing including dimensional inspection, electrical property verification, and surface quality assessment
- Final Inspection
Rigorous final quality control ensures compliance with electronic industry standards and customer specifications
Frequently Asked Questions
What advantages does 99.6% alumina offer over lower purity grades?
99.6% alumina provides superior electrical insulation, better thermal conductivity, and more consistent dielectric properties compared to lower purity grades, ensuring reliable performance in precision electronic applications.
How does the dielectric constant affect chip resistor performance?
The stable dielectric constant of 9-10 ensures consistent capacitance characteristics between resistor elements and the substrate, which is critical for maintaining precise resistance values and signal integrity in high-frequency applications.
Can these substrates withstand high-temperature processing?
Yes, our alumina ceramic substrates maintain dimensional stability and electrical properties at processing temperatures up to 1600°C, making them suitable for various resistor manufacturing processes.
What surface finish options are available for resistor printing?
We offer various surface finishes from standard lapped surfaces to precision polished finishes, optimized for different resistor printing technologies including thick film and thin film processes.
Do you provide material certifications for electronic applications?
Yes, we provide comprehensive material certifications including composition analysis, electrical property testing, and dimensional reports to ensure compliance with electronic industry standards.
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