High-Precision Thick-Film Circuit Substrate Stable Signal Transmission for Automotive Electronics

Thick-Film Circuit Substrate stands as a high-reliability core component, specially engineered for automotive oil level sensor systems and adaptable to diverse industrial scenarios. Crafted to withstand the harshest engine compartment conditions—extreme temperature fluctuations, persistent vibration, and direct oil contamination—it leverages premium alumina ceramic substrate and high-performance aluminum nitride substrate, paired with precision manufacturing, to deliver exceptional stability. With robust customization capabilities covering passenger cars, commercial vehicles, and heavy-duty trucks, it ensures accurate oil level detection critical for engine protection and fuel efficiency, fully complying with ISO 16750 and AEC-Q200 automotive standards.

Product Core Advantages 

The superiority of our Thick-Film Circuit Substrate originates from its specialized substrate materials, each tailored to distinct application demands. Alumina ceramic substrate, our cost-effective and durable flagship option, boasts a flexural strength of ≥350 MPa and thermal conductivity ranging from 15-30 W/(m·K). Its dense ceramic structure forms an impenetrable barrier against oil and coolant penetration, making it the ideal choice for mainstream automotive oil level sensors. For high-performance engines or scenarios requiring extreme heat management, aluminum nitride substrate takes the lead—delivering an impressive 180-220 W/(m·K) thermal conductivity, 10 times that of conventional FR4 substrates. This exceptional heat dissipation cuts sensor overheating risks by 60% and extends operational lifespan by 40%, a game-changer for high-power automotive systems.

Our industry-leading customization capabilities set us apart from off-the-shelf alternatives, addressing the unique needs of every automotive oil level sensor design. Thickness options span 0.3-2.0mm, with ultra-thin 0.3mm variants for compact sensor modules and 2.0mm thick substrates for heavy-duty truck applications. Size flexibility covers 5mm×5mm micro-sensors to 50mm×50mm integrated systems, with edge finishing options (beveled, rounded, squared) to ensure seamless assembly. Precision engineering shines through 0.5mm hole drilling for flawless probe integration and ±0.01mm line width tolerance via advanced laser etching—enabling 0.1mm oil level resolution that meets the strictest automotive sensing accuracy requirements. Custom metallization layers, including NiPdAu and silver coatings, further enhance corrosion resistance and solderability for specific use cases.

Optimized thick-film paste selections are perfectly matched to substrate materials and sensor functions, forming the backbone of reliable circuit performance. Silver (Ag) paste, with conductivity ≥50 S/m, is the top choice for high-sensitivity sensor circuits, ensuring rapid signal transmission between the oil level probe and control unit. For sensors operating in 150℃ continuous oil immersion, silver-palladium (AgPd) paste delivers unmatched oxidation resistance, maintaining stable performance for 10,000+ hours—surpassing standard silver paste lifespans by 250%. Ruthenium oxide (RuO₂) paste stands out for resistor stability, offering ±1% tolerance across the -40℃ to 125℃ temperature range, critical for consistent oil level calibration. Dielectric pastes, available in low and high dielectric constant variants, provide ≥20 kV/mm breakdown voltage, forming robust insulating layers that prevent oil-induced short circuits and ensure long-term reliability.

Our Thick-Film Circuit Substrate delivers tangible value for sensor manufacturers. Compatibility with SMT and reflow soldering processes cuts assembly time by 30%, reducing labor costs and accelerating time-to-market. A 150,000+ mile operational lifespan aligns with automotive warranty requirements, slashing warranty claim costs by 40%. Flexible pricing structures accommodate everything from prototype batches (as low as 50 units) to large-scale OEM supply (100,000+ units/month). Our dedicated automotive thick-film applications team provides end-to-end support, including paste-substrate matching, circuit simulation, and free prototype samples to validate designs before mass production.

We stay ahead of automotive electrification trends with forward-thinking Thick-Film Circuit Substrate solutions. Aluminum nitride substrate is optimized for EV gearbox oil level sensors, supporting high power densities and 48V electrical systems while maintaining efficient heat dissipation. For ADAS-integrated oil level sensors, our precision patterning enables dual-functionality—combining oil level detection with oil quality monitoring to support predictive maintenance systems. Ongoing R&D breakthroughs include silver-copper composite pastes that reduce material costs by 20% without compromising conductivity, and 0.2mm ultra-thin alumina ceramic substrate variants for next-generation miniaturized sensor designs.

Backed by decades of thick-film technology expertise and a global supply chain network, we are a trusted partner for leading automotive sensor manufacturers worldwide. Whether you need a standard alumina ceramic substrate for mainstream oil level sensors or a custom aluminum nitride substrate for high-performance applications, our product delivers the reliability, precision, and durability automotive systems demand. Contact us today to request technical datasheets, free prototype samples, or personalized consultations—elevate your automotive oil level sensor performance with our purpose-built Thick-Film Circuit Substrate.

To ensure customer satisfaction, we offer comprehensive support:

After-Sales Policy: 1-year warranty for regular products. For quality issues during warranty, we respond within 48 hours and complete maintenance/replacement within 7 days.

Featured Services: Customization according to your requirements ad drawings(size: 5-500mm diameter; shape: circular/irregular; porosity:30%-70%) with free design solutions.

New customers get 1-3 samples (15-30-day production cycle). Professional teams provide one-on-one installation guidance and free operation training.

Technical Specifications