INDUSTRY COMPONENT

Copper Interconnects

Copper interconnects are conductive pathways in thermoelectric modules that facilitate electrical current flow between semiconductor elements.

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Component Specifications

Definition
Copper interconnects are critical components in thermoelectric modules, serving as electrical conductors that connect p-type and n-type semiconductor legs. They are typically thin, patterned copper layers or wires that form the electrical circuit, allowing current to pass through the module to generate or absorb heat via the Peltier effect. These interconnects must exhibit high electrical conductivity, thermal stability, and mechanical integrity to ensure efficient energy conversion and long-term reliability in temperature control applications.
Working Principle
Copper interconnects work by providing low-resistance electrical paths between thermoelectric semiconductor materials. When an electric current flows through the interconnects, it drives charge carriers (electrons and holes) across the p-n junctions in the thermoelectric legs, creating a temperature difference via the Peltier effect. The interconnects minimize energy losses due to Joule heating by maintaining high conductivity, while their design ensures uniform current distribution across all thermoelectric pairs for optimal performance.
Materials
High-purity copper (≥99.9% Cu) with optional thin plating (e.g., nickel or gold) for oxidation resistance. Common forms include rolled copper foil (thickness 0.1–0.5 mm), electrodeposited copper layers, or copper wires. Material must have low oxygen content (<50 ppm) to prevent embrittlement and high thermal conductivity (~400 W/m·K).
Technical Parameters
  • Thickness 0.1–0.5 mm
  • Resistivity ≤1.68 × 10⁻⁸ Ω·m
  • Current Density Up to 100 A/cm²
  • Thermal Conductivity 385–400 W/m·K
  • Operating Temperature -50°C to +200°C
  • Electrical Conductivity ≥58 MS/m (100% IACS)
Standards
ISO 9001, IEC 60529, ASTM B152

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Copper Interconnects.

copper interconnects thermoelectric module components Peltier effect conductors electrical interconnects thermal management semiconductor connections Copper Interconnects in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Thermoelectric Module

Solid-state device that converts electrical energy into a temperature difference (Peltier effect) or generates electricity from a temperature gradient (Seebeck effect).

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Engineering Analysis

Risks & Mitigation
  • Oxidation leading to increased resistance
  • Thermal fatigue from cyclic heating/cooling
  • Electromigration at high current densities
  • Mechanical stress from CTE mismatch with semiconductors
FMEA Triads
Trigger: Oxidation due to exposure to high temperatures or humid environments
Failure: Increased electrical resistance, reduced heat pumping capacity, eventual open circuit
Mitigation: Apply protective coatings (e.g., nickel plating), use inert gas atmospheres during assembly, ensure proper sealing of the module
Trigger: Thermal cycling stress from repeated heating and cooling
Failure: Cracking or delamination of interconnects, loss of electrical continuity
Mitigation: Use compliant bonding materials (e.g., solder with additives), design for CTE matching, implement controlled ramp rates in operation

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.05 mm thickness, ±2% electrical conductivity, flatness within 0.1 mm/m
Test Method
Four-point probe resistivity measurement, thermal cycling tests per IEC 60068-2-14, shear strength testing per JEDEC JESD22-B117

Buyer Feedback

★★★★☆ 4.6 / 5.0 (10 reviews)

"Reliable performance in harsh Computer, Electronic and Optical Product Manufacturing environments. No issues with the Copper Interconnects so far."

"Testing the Copper Interconnects now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

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Frequently Asked Questions

Why is copper used for interconnects in thermoelectric modules?

Copper is preferred due to its excellent electrical conductivity (second only to silver), high thermal conductivity, good mechanical strength, and cost-effectiveness, which minimize energy losses and ensure efficient heat transfer in thermoelectric systems.

How do copper interconnects affect thermoelectric module efficiency?

Copper interconnects reduce parasitic electrical resistance and Joule heating, improving the coefficient of performance (COP) and temperature differential capability of the module. Poor interconnects can lead to up to 10–15% efficiency loss.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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