As power electronics, aerospace systems, and 5G infrastructure push toward higher integration and output, managing heat is no longer optional—it’s critical. Traditional alumina (Al₂O₃) substrates struggle under these demands. Enter Aluminum Nitride (AlN): with thermal conductivity up to 170 W/m·K and a CTE closely matching silicon, it’s the ideal substrate for next-gen modules. But integrating reliable thick film resistors onto AlN? That’s been the industry’s toughest hurdle—until now.
Our new Chip AlN Thick Film Resistors solve this challenge head-on. Leveraging proprietary IKTS resistor pastes specifically engineered for AlN, we’ve eliminated the chemical reactions and CTE mismatch that plagued conventional formulations. Our process begins with precision screen printing using 75 µm mesh on high-purity AlN substrates from Huaqing, controlling wet film thickness to ~35 µm for optimal performance.
The key lies in our optimized 850°C/10-min sintering profile. As organics fully volatilize by 500°C, conductive ruthenium oxide particles coalesce into dense, continuous pathways—transforming an insulating paste into a stable, low-resistance film. Unlike generic pastes, ours bonds seamlessly to AlN, ensuring long-term mechanical integrity even under extreme thermal cycling.
We didn’t just make resistors—we perfected them:
- Precision Tuning: Achieving ±20% tolerance after printing is normal. Our laser trimming process (14.5 A current, 2500 Hz Q-frequency, 150 µm spot spacing) delivers final accuracy with clean, >30 µm-wide grooves—zero debris, zero risk of delamination.
- Ultra-Low TCR: All models exhibit positive temperature coefficients (PTC). TCR values are consistently <150 ppm/°C, with most falling below 100 ppm/°C—ensuring minimal drift across -55°C to +150°C operating ranges.
- Exceptional Stability: After rigorous 1000-hour aging at 150°C, all four resistance ranges (1 Ω/□ to 1 kΩ/□) show <1.5% resistance change—proven reliability for mission-critical applications.
- Smart Design Ratio: Based on empirical data, we recommend designing initial values at 80% of target resistance for optimal trimming yield and precision.
They’re ideal for power converters, RF amplifiers, motor drives, satellite payloads, and any system where heat dissipation directly impacts efficiency and lifespan.
No more choosing between power density and reliability. With our AlN-based resistors, you get both: precise electrical performance wrapped in a thermally dominant package.
Upgrade your design. Reduce cooling costs. Extend system life. Choose AlN. Choose Performance. Choose Confidence.
