Inquire: Call 0086-755-23203480, or reach out via the form below/your sales contact to discuss our design, manufacturing, and assembly capabilities.
Quote: Email your PCB files to Sales@pcbsync.com (Preferred for large files) or submit online. We will contact you promptly. Please ensure your email is correct.
Notes: For PCB fabrication, we require PCB design file in Gerber RS-274X format (most preferred), *.PCB/DDB (Protel, inform your program version) format or *.BRD (Eagle) format. For PCB assembly, we require PCB design file in above mentioned format, drilling file and BOM. Click to download BOM template To avoid file missing, please include all files into one folder and compress it into .zip or .rar format.
How to Choose ITEQ Laminates for Automotive PCB Applications
Selecting the right PCB laminate for automotive applications is no longer just about meeting a price point; it’s about ensuring the survival of the electronic “nervous system” under the most brutal conditions imaginable. As vehicles transition toward 5G-enabled autonomous driving (ADAS) and high-voltage electric vehicle (EV) architectures, the demands on the substrate—thermal stability, signal integrity, and ion migration resistance—have reached an all-time high.
For hardware engineers, ITEQ has become a cornerstone of the automotive Approved Vendor List (AVL). Their portfolio bridges the gap between cost-effective engine control units (ECUs) and the bleeding-edge 77GHz radar sensors. This guide provides a deep-dive, engineering-centric look at how to choose the right ITEQ laminates for automotive applications in 2026.
In automotive design, we don’t just design for performance; we design for the “Mission Profile.” A PCB in the cabin has a vastly different stress life than one mounted directly to the transmission or integrated into a battery pack.
The primary stressors for automotive PCBs include:
Thermal Cycling: Transitions from -40°C to +150°C (or higher for under-the-hood).
Vibration & Shock: Constant mechanical stress that can lead to solder joint fatigue and via barrel cracking.
CAF (Conductive Anodic Filament): Electrochemical migration along glass fibers, especially critical in the high-humidity, high-voltage environments of EVs.
Signal Integrity: Maintaining pristine 77GHz waveforms for radar or 25Gbps+ for ADAS data backbones.
1. ITEQ Solutions for ADAS and Radar Systems (24GHz – 79GHz)
Advanced Driver Assistance Systems (ADAS) are the primary drivers of ultra-low loss (ULL) material adoption in cars. Standard FR-4 is effectively a “signal sponge” at these frequencies.
The Millimeter-Wave Specialist: ITEQ IT-88GMW
For 77GHz-79GHz long-range radar, the dielectric constant (Dk) and dissipation factor (Df) must be exceptionally stable across a wide temperature range.
The Choice:IT-88GMW is a halogen-free, ultra-low loss thermoset material designed to replace expensive PTFE (Teflon) products.
Engineer’s Insight: Unlike PTFE, which is notoriously difficult to process and prone to dimensional instability, IT-88GMW behaves like a high-end epoxy. This makes it ideal for Hybrid Stackups, where the RF signals travel on IT-88GMW outer layers while the digital logic resides on cheaper high-Tg FR-4 internal layers.
ADAS High-Speed Data: ITEQ IT-988GSE
As vehicles become “data centers on wheels,” the backbone connecting sensors to the central compute unit needs materials capable of 56Gbps PAM4 and beyond.
The Choice:IT-988GSE (Low Dk Glass version). It offers a Df of ~0.0016 at 28GHz.
Advantage: Its glass transition temperature (Tg) exceeds 230°C, providing massive thermal headroom for complex, high-layer-count HDI (High Density Interconnect) boards.
2. Materials for Electric Vehicle (EV) Powertrains and BMS
EV applications shift the focus from signal speed to Thermal Integrity and High Voltage Reliability.
Battery Management Systems (BMS): ITEQ IT-170GLE
BMS boards must survive decades of vibration and extreme humidity while managing high-voltage strings.
The Choice:IT-170GLE (Halogen-Free, High-Tg).
Why it works: It offers a 40% reduction in thermal expansion issues compared to standard FR-4. The high-Tg (170°C+) ensures the board remains rigid during high-current events and lead-free assembly (260°C peak).
Power Electronics (OBC and DC-DC): ITEQ IT-150DA
Engineers dealing with On-Board Chargers (OBC) or motor inverters need materials that resist Conductive Anodic Filament (CAF) growth under high voltage bias.
The Choice:IT-150DA. It is specifically engineered with modified resin chemistry to block the ionic migration pathways that lead to shorts between adjacent vias.
3. Thermal Management for Automotive LED Lighting
LED headlamps are point-sources of heat. If the substrate cannot move that heat away, the LED junction temperature spikes, leading to color shift and premature failure.
ITEQ IT-859GT (Metal Core / High-Power)
For high-intensity discharge (HID) replacements or Matrix LED arrays, engineers often turn to Insulated Metal Substrates (IMS) or specialized laminates.
The Choice:IT-859GT or high-thermal conductivity FR-4 variants.
Thermal Performance: These materials are often ceramic-filled to increase thermal conductivity from the base resin’s 0.25 W/mK to upwards of 1.0-3.0 W/mK, allowing the PCB to act as a heat spreader.
In automotive boards with high layer counts or large BGAs, the Z-axis expansion is the “silent killer.” When the board expands vertically more than the copper plating in the holes, the via barrels crack.
Rule of Thumb: Look for ITEQ materials with a total Z-axis expansion of <3.0% (from 50°C to 260°C). Materials like IT-180A are the gold standard here.
Moisture Absorption
Automotive electronics are rarely in a hermetically sealed environment. Moisture absorption leads to “measling” or delamination during reflow. ITEQ’s automotive-grade materials typically maintain moisture absorption below 0.1%, ensuring that the dielectric constant stays stable even in humid environments.
CAF Resistance (Conductive Anodic Filament)
For EV designs with 400V or 800V rails, the via-to-via spacing is a critical risk area. Always specify materials that have passed 1,000 hours of CAF testing at the specific pitch of your design (e.g., 0.4mm or 0.5mm via-to-via).
5. Sourcing and Design Resources
Selecting the material is only half the battle; you must ensure your fabricator has the process controls to handle high-performance laminates.
Database & Stackup: Use ITEQ’s official online stackup tool to verify impedance based on actual resin content (RC%).
Verification: For high-reliability automotive builds, verify the material meets IPC-6012DA (Automotive Addendum) Class 3 standards.
Procurement: To synchronize with qualified fabrication partners, you can consult specialized ITEQ PCB resources to ensure material availability during the prototyping phase.
Frequently Asked Questions (FAQs)
1. Can I use standard IT-140 for automotive cabin electronics?
While IT-140 (Tg 140°C) is cost-effective, it is generally discouraged for critical automotive modules. For long-term reliability and survival through lead-free assembly cycles, engineers usually start at IT-180A or IT-170 series to ensure safety margins.
2. Why is IT-88GMW better than PTFE for radar?
PTFE (Teflon) has a massive CTE mismatch with FR-4, making hybrid boards prone to delamination. IT-88GMW is a thermoset material, meaning it behaves like FR-4 during lamination, leading to much higher yields and lower costs for multilayer radar boards.
3. What ITEQ material should I use for EV Battery Management Systems (BMS)?
IT-170GLE is the industry favorite. Its combination of high Tg, halogen-free compliance, and superior CAF resistance makes it ideal for the high-voltage, high-vibration environment of an EV battery pack.
4. How does moisture absorption affect automotive 5G signals?
Water has a high Dk (~80). If a material like IT-988GSE absorbs moisture, its effective Dk will shift, causing impedance mismatches and ruining the signal integrity of ADAS data links. High-performance ITEQ materials are engineered for <0.1% absorption to prevent this.
5. Is IT-180A compatible with heavy copper for power applications?
Yes. IT-180A is frequently used in 2oz, 3oz, or even heavier copper builds for power distribution, thanks to its high Tg and excellent resin flow characteristics which encapsulate thick copper features without voids.
Inquire: Call 0086-755-23203480, or reach out via the form below/your sales contact to discuss our design, manufacturing, and assembly capabilities.
Quote: Email your PCB files to Sales@pcbsync.com (Preferred for large files) or submit online. We will contact you promptly. Please ensure your email is correct.
Notes: For PCB fabrication, we require PCB design file in Gerber RS-274X format (most preferred), *.PCB/DDB (Protel, inform your program version) format or *.BRD (Eagle) format. For PCB assembly, we require PCB design file in above mentioned format, drilling file and BOM. Click to download BOM template To avoid file missing, please include all files into one folder and compress it into .zip or .rar format.
