Used For Making Chip Resistors 99.6% Alumina Ceramic Substrate
2 year ago
99.6% Alumina Ceramic Substrate: Precision Foundation for Chip Resistors & Hybrid Circuits
Product Overview
Puwei's 99.6% Alumina Ceramic Substrate (Al₂O₃) is the industry benchmark for reliability in passive component manufacturing. Engineered with ultra-high purity and exceptional consistency, it provides the perfect foundation for Thick Film Resistor and Film Resistor Element applications, ensuring outstanding electrical insulation, thermal stability, and mechanical support. As a cornerstone of Microelectronics Packaging, it guarantees signal integrity and long-term performance in demanding high-frequency modules and RF circuits.
High-purity 99.6% Al₂O₃ substrate blanks, ready for precision resistor patterning.
Substrates enabling high-yield manufacturing of precision chip resistors.
Why Choose Our Alumina Substrate? Key Benefits
- Maximize Production Yield: Ultra-low impurities and superior surface flatness ensure uniform paste deposition, critical for achieving tight resistance tolerances (e.g., ±0.1%) and minimizing scrap.
- Guaranteed Electrical Stability: Volume resistivity >10¹⁴ Ω·cm and stable dielectric constant (9-10 @ 1MHz) prevent leakage and ensure consistent performance in Microwave Applications and hybrid micro circuits.
- Superior Mechanical & Thermal Robustness: High flexural strength (300-400 MPa) withstands firing, trimming, and handling stresses without warping, serving as a reliable insulation element.
- Enables Advanced Miniaturization: Supports the production of ultra-small chip resistors (01005, 0201) and dense Thick Film Hybrid Microcircuit designs.
- Optimizes Total Cost of Ownership: High batch-to-batch consistency and intrinsic reliability reduce processing issues, field failures, and overall supply chain risk.
Technical Specifications & Properties
Material & Electrical Properties
Composition: 99.6% Al₂O₃ with minimal trace impurities. Key electrical properties include Volume Resistivity > 10¹⁴ Ω·cm, Dielectric Constant of 9-10 @ 1 MHz, and Dielectric Strength of 15-25 kV/mm. Material density is 3.8-3.9 g/cm³, making it an ideal Bare Ceramic Plate for component assembly.
Thermal & Mechanical Properties
Thermal Conductivity: 20-30 W/(m·K). Coefficient of Thermal Expansion (CTE): 7.2-8.0 ppm/°C. Flexural Strength: 300-400 MPa. Vickers Hardness: HV 1500-1700. This balanced profile ensures compatibility with various pastes and metals in Electronic Packaging.
The Critical Role of 99.6% Purity
For precision resistors, substrate purity is non-negotiable. Our 99.6% purity minimizes conductive impurities that cause electrical leakage and parasitic effects, ensuring predictable performance. This makes it the optimal choice over lower-purity alumina for high-reliability applications, and a cost-effective alternative to AlN for most resistor and Integrated Circuit support functions.
Primary Application Scenarios
Precision & General-Purpose Chip Resistors
The standard base for thick-film resistor pastes across consumer electronics, automotive, and industrial controls.
High-Frequency & RF/微波射频 Components
Essential for resistors in Microwave Components, filters, and communication devices where stable dielectric properties are critical.
Automotive & Power Electronics
Used in ECUs, sensors, and near Power Devices for its durability under thermal cycling and harsh environments.
Hybrid & Micro Circuits
The foundational platform for Thick Film Printed Circuit and complex HYBRID MICRO CIRCUITS, providing reliable interconnects and insulation.
Integration into Your Manufacturing Workflow
- Design & Specification: Define dimensions, thickness, and surface finish with our technical team.
- Material Qualification (IQC): Verify substrate properties against the provided Certificate of Analysis.
- Printing & Patterning: Screen-print resistor and conductor pastes onto the clean, flat substrate surface.
- Firing & Laser Trimming: Fire per paste profile; the substrate's thermal stability ensures precise laser trim to target values.
- Final Test & Assembly: Singulate and package. The substrate's consistency ensures high final test yield.
Certifications & Quality Assurance
Our manufacturing is ISO 9001:2015 certified, and materials are fully compliant with RoHS and REACH. We provide full traceability and batch-specific Certificates of Analysis, ensuring every substrate meets the stringent requirements of global Microelectronics and Sensor Packaging supply chains.
Customization & OEM/ODM Services
We tailor our substrates to your precise needs:
- Precision Dimensions: Custom sizes and thicknesses with tight tolerances.
- Surface Finish: Lapped or polished surfaces to optimize paste adhesion and laser trim performance.
- Form Factors: Delivered as panels, strips, or pre-singulated pieces for your automated line.
- Technical Partnership: Collaborate with our engineers to optimize the substrate for your specific resistor or circuit performance goals.
Manufacturing Process & Quality Control
Our process guarantees consistency: Electronic-grade powder formulation, precise dry pressing, controlled high-temperature sintering, and precision grinding/lapping. 100% of production undergoes rigorous inspection for dimensions, flatness, and surface defects, ensuring a reliable foundation for your high-volume Electronic Packaging manufacturing.
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