Multilayer Separation Copper Substrate

Multilayer separation copper substrates are at the heart of advanced thermal management systems, offering a robust combination of high electrical isolation and exceptional heat transfer. Engineered with a ceramic-filled dielectric layer sandwiched between copper sheets, these substrates support complex circuit patterns while efficiently channeling heat away from power-dense components. For automotive and industrial applications requiring the highest fire safety standards, we provide the Ul 94v-0 Thermoelectric Copper Substrate for Auto, built to endure underhood temperatures and vibration while delivering consistent thermoelectric performance. The same stringent UL 94V-0 rating is available in our general-purpose Ul 94v-0 Thermoelectric Copper Substrate, ideal for consumer electronics cooling modules and industrial power converters. In electric vehicle power electronics where precise layer thickness directly impacts efficiency and form factor, our Thickness Thermoelectric Copper Substrate for EV delivers custom copper and dielectric gages, enabling optimization of both thermal resistance and parasitic capacitance. For designs that demand intricate single-layer circuit patterns with tight tolerances, the Precision Single Sided Thermoelectric Copper Substrate provides a cost-effective platform for thermoelectric coolers, sensors, and compact power modules, all while maintaining exceptional dimensional accuracy and surface quality.

The Multilayer Separation Copper Substrate architecture stands out by physically isolating individual copper traces within a single thermal core, effectively preventing galvanic corrosion and electromigration even under high current densities and harsh environmental conditions. This separation concept allows designers to route multiple independent circuits—such as high-side and low-side power paths or sensing elements—through the same substrate without compromising dielectric integrity. The Multilayer Separation Copper Substrate can accommodate both single-sided and double-sided component placement, reducing board footprint and enabling three-dimensional power layout strategies. Its custom-patternable copper surfaces are compatible with direct soldering, heavy-wire bonding, and silver sintering, making the substrate a future-ready choice for wide-bandgap semiconductors like silicon carbide and gallium nitride. With a continuous operating temperature range from -40°C to 175°C and a dielectric strength exceeding 15 kV/mm, this substrate ensures long-term reliability in demanding thermoelectric generators, EV traction inverters, and high-brightness LED arrays.

• Thermal conductivity: ≥2.0 W/m·K through-plane, ensuring efficient heat extraction from mounted devices.
• Flammability rating: UL 94V-0 certified, with V-1 and V-2 options available upon request.
• Voltage withstand: >2.5 kV AC (dependent on dielectric thickness), complying with international safety standards.
• RoHS and REACH compliant, suitable for global electronics manufacturing without restricted substances.
• Copper thickness: customizable from standard 1 oz (35 µm) up to heavy 500 µm layers, supporting high-current paths.
• Dielectric layer thickness: standard options of 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, and 0.38 mm; custom thicknesses available for specific thermal and voltage requirements.
• Etching accuracy: minimum line/space capability of 150 µm / 150 µm, enabling dense circuit patterning.
• Surface finishes: OSP, ENIG, or bare copper, optimizing solderability and wirebonding performance for various assembly processes.
• Peel strength: minimum 8 N/cm, guaranteeing robust adhesion between copper and dielectric under thermal cycling.
• Continuous operating temperature: -40°C to +175°C, accommodating both cryogenic and high-temperature thermoelectric applications.