Precision Copper Heat Sink CNC Machining | OFHC Skived Fins

High-Performance Thermal Management: Custom Copper Heat Sink Fabrication

Effective thermal management in high-TDP (Thermal Design Power) electronics requires materials with superior flux density. We provide custom copper heat sink solutions that outperform standard aluminum by 2.1x in conductivity. By utilizing CNC machining services, we produce complex geometries including recessed pockets for IGBT modules and integrated mounting hardware for server-grade applications.

Engineering Specifications: Material Grades & Tolerances

Advanced Manufacturing: Skiving, CNC Milling, and Assembly

Skived Fin Technology for Zero Interface Resistance

Our skiving process involves peeling fins directly from a solid copper slab. This creates an integrated fin-to-base structure, ensuring there is no thermal interface resistance typically found in bonded or soldered heat sinks. This is the optimal choice for high-power inverters.

CNC Machined Copper Heat Sink with Integrated Heat Pipes

For extreme power densities, we utilize 5-axis CNC machining to mill precision grooves for heat pipe embedding. We specialize in vacuum brazing and epoxy bonding of copper heat pipes and vapor chambers to enhance lateral heat spreading.

Quality Assurance: Metrology & Thermal Validation

Xiamen Dazao Machinery enforces a zero-defect policy for all medical-grade and industrial copper components:

Flatness Verification: Laser scanning of the contact base to ensure ≤0.05mm deviation.

Material Traceability: MTR (Material Test Reports) for every lot of C11000/C10200 copper.

Environmental Testing: Salt spray and humidity testing for nickel-plated surfaces to ensure 10+ year service life.

Industrial Applications: High-Density Power Systems

Our thermal solutions serve high-density power systems in telecom computing automotive and power electronics.

Telecom

5G Macro Station power amplifiers and RF modules.

Computing

Enterprise Server CPU/GPU thermal modules and data center cooling.

Automotive

EV Traction Inverters, DC-DC Converters, and On-board Chargers (OBC).

Power Electronics

IGBT modules for high-speed rail and wind power converters.

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FAQs

 

 

01.Why choose Oxygen-Free Copper (OFHC) for a heat sink?

OFHC copper (C10200) contains 99.95% pure copper with minimal oxygen content, which prevents hydrogen embrittlement during brazing and provides the highest possible thermal and electrical conductivity for sensitive electronic components.

02.What is the minimum fin thickness achievable through skiving?

We can achieve a minimum fin thickness of 0.1mm with a pitch as small as 0.2mm. This high-aspect-ratio fin structure significantly increases the surface area within a compact footprint compared to traditional extrusion.

03.Can you provide CNC machined copper heat sinks with nickel plating?

Yes. Electroless Nickel Plating (ENP) is our standard surface treatment. It provides excellent corrosion resistance and maintains solderability, which is critical for components used in marine or high-humidity industrial environments.

04.How do you manage the "softness" of copper during CNC machining?

Copper's high ductility can lead to burr formation. We utilize specialized diamond-coated tooling and high-speed Swiss-type machining parameters to ensure clean fin edges and a burr-free surface finish of Ra 0.8 or better.

05.What file formats do you require for a custom copper heat sink quote?

We accept 3D CAD files in STEP (.stp), IGS, or SolidWorks formats. For critical tolerances and surface finish requirements, please also provide a 2D PDF drawing highlighting the specific engineering specifications.

06.Do you support low-volume prototyping for thermal testing?

Yes. We offer rapid prototyping services for copper heat sinks, with no minimum order quantity (MOQ 1). This allows R&D engineers to validate thermal simulations before committing to mass production tooling.

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