Vapor Chamber Heatsinks (VCH) are advanced two-phase thermal management solutions designed for high-power and high-heat-flux electronic applications. Also known as planar heat pipes or heat spreaders, vapor chambers utilize phase-change technology to rapidly transfer and evenly distribute heat across a large surface area, significantly improving overall cooling performance.
Compared with traditional heat sinks and heat pipe solutions, vapor chambers offer superior heat spreading capability, reduced thermal resistance, minimized hot spots, and enhanced temperature uniformity. They are widely used in high-performance electronics, AI servers, telecommunications equipment, industrial power systems, automotive electronics, aerospace systems, LED lighting, and data centers.
A vapor chamber consists of a sealed copper enclosure containing:
A vacuum chamber
Internal wick structures
A small amount of working fluid, typically de-ionized water
When heat is applied to the evaporator area, the working fluid rapidly vaporizes under low-pressure conditions. The vapor spreads throughout the chamber and transfers heat to cooler regions, where it condenses back into liquid form and releases latent heat. The condensed liquid then returns to the heat source through capillary action within the wick structure.
This continuous evaporation and condensation cycle allows vapor chambers to achieve extremely efficient heat transport and highly uniform temperature distribution.
Vapor chambers can improve thermal performance by 10–30% compared with conventional copper heat sinks or heat pipe solutions. Their effective thermal conductivity can reach 5–100 times that of solid copper, depending on the application.
The planar structure enables heat to spread rapidly from small heat sources to larger cooling surfaces, making vapor chambers ideal for high heat flux devices such as:
CPUs
GPUs
IGBT modules
AI processors
Power electronics
Direct contact between the vapor chamber and the heat source eliminates the additional thermal resistance associated with traditional base plates.
Due to the hollow internal chamber design, vapor chamber heat sinks are significantly lighter than solid copper heat sinks while offering superior cooling performance.
Vapor chambers are particularly suitable for low-profile and space-constrained applications where thermal performance is critical.
Traditional two-piece vapor chambers are manufactured using two stamped copper plates, allowing for highly customizable shapes and structures tailored to specific PCB layouts and application requirements.
Design features may include:
Custom shapes and cut-outs
Through holes for mounting
Multi-zone wick structures
Varying wick thickness and porosity
Grooved or sintered wick combinations
These design optimizations improve:
Maximum heat transport capability (Qmax)
Anti-gravity liquid return performance
High heat flux handling
Evaporator thermal resistance
Vapor chambers can utilize several wick structures, including:
Sintered wick
Grooved wick
Mesh or fiber wick
Among these, copper sintered wick structures combined with copper enclosures and water working fluid are the most commonly used due to their:
High capillary pumping capability
Excellent thermal performance
Long-term reliability
Vapor chambers are highly reliable thermal devices with:
No moving parts
Fully sealed structures
Long operational lifetime
Excellent resistance to mechanical degradation
Typical reliability validation includes:
Thermal shock testing
Accelerated life testing
Freeze-thaw testing
Burst pressure testing
Cosmetic degradation testing
Typical vapor chamber lifetime exceeds:
| Parameter | Specification |
|---|---|
| Operating Temperature | 0 – 85°C |
| Power Range | 20 – 700 W |
| Heat Flux | Up to 300 W/cm² |
| Width / Length | 50 – 500 mm |
| Thickness | ≥ 2.5 mm |
| Flatness | ≤ 0.1 mm / 25×25 mm |
| Through Holes | Available |
Our vapor chamber cooling solutions can be fully customized according to customer requirements, including:
Copper or aluminum integration
Stamped fin assemblies
Zipper fin structures
Low-profile cooling systems
AI server cooling
Industrial power electronics
High-density PCB cooling
Two-phase cooling modules
With advanced thermal engineering capabilities, CFD simulation support, and precision manufacturing technologies, we provide high-performance vapor chamber heat sink solutions optimized for demanding thermal management applications.