Copper Molybdenum Copper Composite (CMC) Material
The Ideal Choice for High-Performance Thermal Management and Electronic Packaging
Product Overview
Copper Molybdenum Copper (CMC) composite material is an innovative laminar metal composite, fabricated by tightly bonding copper (known for its excellent thermal and electrical conductivity) with molybdenum (renowned for its low coefficient of thermal expansion (CTE) and high rigidity) through specialized processes such as roll bonding, diffusion bonding, or vacuum brazing. The typical structure consists of two copper layers sandwiching a molybdenum layer, i.e., Cu-Mo-Cu.
CMC material is designed to address the challenges faced by traditional monolithic materials in demanding electronic packaging and thermal management applications. Its core advantage lies in its ability to achieve a tunable coefficient of thermal expansion, allowing it to perfectly match various semiconductors (e.g., Si, GaAs, SiC, GaN chips) while maintaining excellent thermal and electrical conductivity.
Key Features & Technical Advantages
⚡Tunable Coefficient of Thermal Expansion (CTE)
By adjusting the thickness ratio of the copper and molybdenum layers, the overall CTE can be precisely controlled for an ideal match with semiconductor chips.
🔥Excellent Thermal Conductivity
The copper layers provide superior thermal conduction paths, ensuring efficient heat transfer and lower operating temperatures.
🔋Exceptional Electrical Conductivity
The copper surfaces ensure excellent electrical connectivity for high-performance packaging applications.
💪High Strength & Rigidity
The molybdenum core provides outstanding dimensional stability and structural support.
Core Application Fields
- Power Electronic Module Substrates: Heat sinks for IGBT modules, MOSFETs, and PDMs.
- RF/Microwave Packaging: Substrates for high-power RF, radar, and T/R modules.
- LED Heat Dissipation: Efficient thermal management for high-power LED chips.
- Laser Diode Mounts: Stable packaging bases for optical communication.
- Aerospace & Military: High-reliability electronic packaging for satellite and missile systems.
Our Advantages
We combine advanced manufacturing technology with rigorous quality control to deliver high-performance CMC solutions tailored to your specific thermal and mechanical requirements.
Frequently Asked Questions (FAQ)
Q: What is the main structure of CMC material?
A: CMC is a laminar composite typically structured as two copper layers sandwiching a molybdenum layer (Cu-Mo-Cu).
Q: Why choose CMC over Tungsten Copper?
A: CMC offers a lower density (lighter weight) while achieving similar CTE matching performance.
Q: Can the CTE of CMC be customized?
A: Yes, the CTE can be precisely tuned by adjusting the thickness ratio of the copper and molybdenum layers.
Q: Is CMC easy to process for packaging?
A: Yes, the surface copper layer allows for easy machining, electroplating, welding, and brazing.
Q: How should CMC materials be stored?
A: They should be stored in a cool, dry, well-ventilated area
away from corrosive gases and chemicals.
