Copper MIM

1. Overview

Pure Copper Metal Injection Molding (Cu-MIM) is a near-net-shape manufacturing process combining powder metallurgy and plastic injection molding to produce complex, high-precision copper components. Cu-MIM is particularly suited for applications requiring high electrical and thermal conductivity with complex geometries.

2. Key Advantages

High Functional Performance

• Excellent electrical conductivity
• Superior thermal conductivity
• Non-magnetic and corrosion resistant

Design Freedom

• Complex 3D geometries
• Thin walls and micro-features
• Internal channels for cooling

Precision & Quality

• Tight tolerances (±0.3–0.5%)
• Good surface finish (Ra0.7-1.0um)
• Reduced secondary machining

Cost Efficiency (at Scale)

• High material utilization
• Suitable for medium–high volume production
• Lower total cost vs machining for complex parts

3. Key Process Considerations

Pure copper presents unique challenges:

• Oxidation sensitivity - requires vacuum or hydrogen sintering
• High thermal conductivity - impacts molding and sintering uniformity
• Densification control - critical for conductivity and mechanical integrity

Tight control of feedstock homogeneity, debinding, and sintering atmosphere is essential to avoid defects (e.g., cracks, porosity).

4. Typical Applications

Electronics & Electrical

• Connectors, terminals, lead frames
• RF/microwave components
• EMI shielding parts

Thermal Management

• Heat sinks with micro-pin fins
• Cooling plates for CPUs, GPUs
• Power module thermal components

Automotive & E-Mobility

• EV power connectors
• Battery and inverter cooling parts
• Motor-related conductive components

Medical & Industrial

• Antibacterial components
• Precision conductive parts
• Telecom waveguides and filters

5. Summary

Cu-MIM enables the production of high-performance copper components that combine:

• Complex geometry
• Excellent conductivity
• Scalable manufacturing

It is a key technology for electronics, EVs, and advanced thermal management systems, where conventional manufacturing struggles to deliver both performance and complexity.

Contact us today to inquire about our services.