Custom Copper Heat Sink
- Select different grades of copper raw materials for your custom heat sink
- Customize fin shapes and dimensions to fit your component assembly
- Strictly control tolerances for your custom high precision copper heat sink
- DFM verification of the manufacturing and installation of your custom copper heat sinks
What is Custom Copper Heat Sink
Custom copper heat sinks are specialized thermal solutions designed specifically for high-performance applications using copper material. Due to limited internal space and irregular component placement within devices, standard copper heat sinks often fail to meet installation and cooling requirements.
Custom copper heat sinks allow for tailored fin shapes, adjustable fin spacing and angles, and a variety of surface finishes. To ensure the efficient operation and longevity of electronic components, these custom-designed copper heat sinks are perfectly tailored to your components and provide highly effective heat dissipation.
If you are sourcing custom cooling solutions for AI servers or GPU accelerator cards, custom-made copper heatsinks are undoubtedly the best choice.
Custom Copper Heat Sink By Cooling Method
We offer customization services for copper heat sinks with various cooling methods to suit different applications. The choice typically depends on your requirements regarding noise level, cooling performance, and space constraints.
It relies on buoyancy and convection of air. The heat rises from the bottom and spreads evenly along the fins. The CNC machined anodize finish can help enhance heat radiation to keep the temperature of interiors.
Different from passive ones, the active copper heat sink usually uses fans or pumps to increase convection coefficient. CNC machining is significantly used to ensure the accuracy of the mounting holes and smooth surfaces of the vibration-damping grooves, free of burrs and tool marks.
The more common situation is to combine two types of cooling methods by high precision of CNC machining. It can achieve a balance between efficient internal cooling and rapid heat dissipation, making the performance far beyond the two single-structured copper heat sinks.
Custom Copper Heat Sink- By fin shapes
Straight FinThe straight fins are arranged in parallel rows, with uniform spacing and uniform thickness.
Corrugated FinThe fins are arranged in a continuous wave pattern to force the air to flow in a wave-like pattern.
A dense array of cylindrical or square pin fins allowing air to pass through from all directions.
Enhanced FinIt usually involves many kinds of methods, which can result in higher costs but better heat dissipation.
Surface Treatments of Copper Heat Sink
As a professional manufacturer of custom copper heat sinks, we not only offer CNC machining but also provide a range of surface treatments for custom copper heat sinks, delivering tailored heat dissipation solutions.
used to restore the original luster of copper and prepare for the next processes
coating on the copper with nickel, tin, silver, chromium, gold, to improve corrosion resistance and wear resistance
forms a protective film prevent surface oxidation and discoloration
can achieve better appearance and remarkably affect thermal conductivity.
Custom Copper Heat Sink With High Aspect Ratio
Due to copper’s exceptionally high thermal conductivity but relatively limited heat dissipation into the air, it is necessary to install more heat fins within a confined space. This requires the fins to be as thin and evenly distributed as possible.
However, conventional copper heat sinks often suffer from thick fins and uneven surface streaks due to raw material adhesion during machining, which prevents achieving the desired performance.
For custom copper heat sinks, we employ layered cutting during copper fin machining, optimize spindle speeds to avoid resonance zones, and use climb milling to minimize burrs. Additionally, reinforcing ribs are applied when needed to prevent deformation caused by excessively thin fins.
Through these techniques, we can produce heat sink fins with an extremely high aspect ratio. The higher the aspect ratio, the thinner and more densely packed the fins can be, enabling superior heat dissipation within limited space.
Strict Tolerance Control for Custom Copper Heat Sinks
The precision of custom copper heat sinks is primarily reflected in the flatness and perpendicularity of their base surfaces. The surface roughness of the copper fins also affects heat dissipation performance. Therefore, high precision copper heat sinks must be the top choice for the vast majority of engineers.
Standard copper heat sinks have a surface roughness of ≤ 0.8 μm, with base flatness within 0.1 mm and a basic fin verticality requirement of 0.1 mm. For high-precision, high-performance custom copper heat sinks, the surface roughness can be achieved as low as 0.4 μm or even lower, reducing contact thermal resistance by approximately 30%. The base flatness can reach 0.01 mm to 0.05 mm, while the verticality tolerance between fins in custom designs can be tightly controlled within 0.02–0.05 mm.
By strictly controlling these tolerances, custom copper heat sinks become the optimal choice for high-performance applications.
Company Advantage
Fast Quotes Within 2 Hours: We provide precise quotes based on the raw materials, number of fins, and aspect ratio required for your custom copper heat sink.
Quality Issue Response Within 48 Hours: We offer technical solutions for issues related to surface texture, bottom surface flatness, and perpendicularity of your custom copper heat sink.
DFM Support: We simulate the airflow path through your custom copper heat sink and assess the feasibility of the manufacturing process.
Applications of Custom Copper Heat Sinks
The gradually increasing charging efficiency demands higher thermal dissipation performance from core components such as inverters. Moreover, during vehicle operation, custom copper heat sinks with reduced fin breakage are better suited for long-term use as automotive parts.
Multiple high-speed CPUs are distributed inside the server, generating heat sources at nearly varying heights. Custom copper heat sinks can cover multiple height levels, enabling rapid dissipation of heat generated during massive data processing. Additionally, when welded with heat pipes, they do not suffer from electrochemical corrosion, facilitating the formation of complete thermal modules.
The key core component of 5G communication is the AUU, which in outdoor environments can easily reach surface temperatures above 80 degrees Celsius. Copper heat sinks exhibit less thermal conductivity degradation at such high temperatures, maintain greater dimensional stability, and remain securely attached to the chip over long periods, resulting in superior heat dissipation performance.
Copper Performance Chart
The purity of raw copper affects its heat dissipation performance. The higher the copper content, the lower the impurity content, and the fewer factors that hinder heat transfer, thereby ensuring excellent thermal conductivity.
- Data Sheet
| Parameter | C11000 | C10200 | C10100 |
|---|---|---|---|
| Purity (%) | ≥ 99.90 | ≥ 99.95 | ≥ 99.99 |
| Oxygen Content (ppm) | 200 – 500 | ≤ 10 | ≤ 5 |
| Thermal Conductivity (W/m·K) | ~385 | ~389 | ~398 |
| Yield Strength (MPa) | 30 – 50 | 70 – 115 | 40 – 140 |
| Hydrogen Embrittlement Risk | Yes | No | No |
Based on your drawings and specific tolerance requirements, we will quickly and carefully assess the production time and complexity of the project and provide a reasonable quote as soon as possible.
Because of the more complex machining process for copper heat sinks, it takes more time to ensure uniform thickness of fins.
When selecting a grade of copper, the most expensive option isn’t necessarily the best. Instead, it’s about striking a balance between performance, manufacturing processes, and cost. We typically help our clients make decisions by addressing three key questions.
Generally speaking, copper heat sinks should be cleaned of dust regularly to ensure proper heat dissipation.
