Jindu Brazed Liquid Cold Plates
Metallurgical Bonding for Ultra-Low Thermal Resistance, Microchannel Precision & 20-Year Hermetic Reliability.
Understanding Brazing Technology
What is Brazing?
Brazing is a metal-joining process in which two or more metal items are joined together by melting and flowing a filler metal into the joint. The filler metal has a lower melting point than the adjacent metal pieces. Unlike welding, the base metals themselves do not melt. Capillary action draws the molten filler metal into the joint, and upon solidification, it creates a strong, leak-proof, metallurgical bond between the components.
What is Vacuum Brazing?
At Jindu, we primarily utilize Vacuum Brazing, a superior form of brazing that takes place in a controlled vacuum furnace. This method offers significant advantages:
Flux-Free Joint
Performing brazing in a vacuum eliminates the need for flux, which can leave corrosive residues and degrade performance over time. This results in a cleaner, stronger, and more reliable joint.
Superior Joint Quality
The vacuum environment prevents oxidation during the heating process, leading to exceptionally clean, strong, and void-free bonds.
Complex Assemblies
Vacuum brazing is ideal for complex assemblies with intricate internal geometries, enabling the joining of multiple components simultaneously.
This simple yet effective mechanism makes extruded heat sinks a reliable and maintenance-free cooling solution for a wide range of thermal loads.
Ready to Enhance Your Thermal Performance?
Don’t compromise on cooling. Partner with Jindu, the leader in high-performance Brazed Liquid Cold Plate technology, and empower your systems to perform at their best.
Jindu's Brazed Liquid Cold Plate Offerings
At Jindu, we provide comprehensive solutions for brazed liquid cold plates, covering every aspect from design to delivery.
Materials Expertise
We work with a range of high thermal conductivity materials, selected based on your application's specific needs
Aluminum Alloys: Commonly used aluminum alloys for brazed cold plates include 3003, 6061, and 6063. These offer an excellent balance of thermal performance, lightweight characteristics, and cost-effectiveness. Our materials provide thermal conductivity up to 200 W/mK.
Copper: For applications demanding maximum heat transfer, we utilize high-purity copper.
Dissimilar Metals: Our brazing capabilities extend to joining various material combinations, including aluminum to aluminum, copper to copper, and even copper to stainless steel.
Custom Design & Engineering
Our team of thermal experts provides end-to-end design support to optimize your brazed cold plate
Precise Thermal Load Analysis: We begin by thoroughly analyzing your component's heat load, power dissipation, and thermal distribution to create an accurate thermal map.
Optimized Flow Channel Design: Leveraging advanced CFD simulations (using ANSYS Fluent), we design custom flow channels (e.g., serpentine, parallel, or specialized fin structures) that maximize heat transfer while minimizing pressure drop (up to 30% reduction).
Dimensional Accuracy:All our cold plates undergo CNC precision processing with a tight tolerance control of ±0.05mm, ensuring perfect flatness and seamless integration with your heat-generating components.
Inlet/Outlet Customization: Flexible placement and sizing of inlet/outlet ports to match your system's fluid loop requirements.
Manufacturing & Quality Control
Our state-of-the-art manufacturing facilities ensure the highest quality standards
Integrated Production: From material preparation and internal channel machining to the vacuum brazing process and final finishing, all steps are controlled in-house.
Rigorous Quality Assurance: Every Jindu brazed cold plate undergoes a multi-stage quality control process, including:
Thermal Simulation (ANSYS Fluent).
Pressure Testing: Verification of structural integrity and burst resistance.
Sealing/Leakage Testing: Precise helium leak detection to confirm hermetic integrity.
Thermal Performance Validation: Actual performance testing to confirm specified thermal resistance and temperature uniformity.
Flow Channel Cleaning: Internal channels are meticulously cleaned with 80°C hot water to remove any residues before shipment.
Technical Specifications & Performance Highlights
| Feature | Jindu Zipper Fin Heat Sink Performance |
| Heat Flux Density Range | 500W to 20KW |
| Leakage Rate | < 1×10-⁸ Pa·m³/s |
| Pressure Resistance | High operating pressure capable (e.g., up to 300 bar for some FSW solutions, brazed also high) |
| Overall Thickness | As thin as 10mm (material dependent) |
| CNC Machining Tolerance | ±0.05mm |
| Material Thermal Conductivity | Up to 200 W/mK (for Al/Cu) |
| Pressure Drop Reduction | Up to 30% (with optimized channels) |
| Typical Sample Cycle | 7 Days |
| Mass Production On-Time Delivery | 98% |
| Expected Lifespan | 20 years |
Ready to Enhance Your Thermal Performance?
Don’t compromise on cooling. Partner with Jindu, the leader in high-performance Brazed Liquid Cold Plate technology, and empower your systems to perform at their best.
Surface Treatment of Brazed Liquid Cold Plates
Jindu’s Brazed Liquid Cold Plates undergo specific surface treatments to enhance their durability and corrosion resistance. These treatments are crucial for ensuring a long operational lifespan and optimal performance in various demanding environments.
Here are the surface treatment options offered for Jindu’s brazed liquid cold plates, and additional common surface treatments found in the industry:
Diverse Applications
The robust performance and reliability of Jindu’s Brazed Liquid Cold Plates make them indispensable across various high-power and mission-critical industries:
Why Partner with Jindu? Your Trusted Thermal Management Expert
Choosing Jindu for your Extruded Heat Sinks means selecting a partner committed to excellence, innovation, and your long-term success.
15 Years of Proven Expertis
With over a decade and a half in thermal management, we bring unparalleled industry knowledge and a track record of success, having proudly served global leaders like NVIDIA and ABB.
Comprehensive Solutions
Our "comprehensive solution for all scenarios" includes both copper brazing and Friction Stir Welding processes, ensuring we can provide the optimal thermal solution for your unique requirements.
Integrated One-Stop Service
From initial consultation and custom design to advanced simulation (ANSYS Fluent), precise manufacturing, rigorous testing, and efficient mass production, Jindu offers a seamless, integrated process.
Agility & Reliability
Our rapid 7-day sample cycle allows for swift design validation, and our impressive 98% on-time delivery rate for mass production ensures your projects stay on schedule.
Unwavering Quality & Certifications
Our commitment to the highest quality standards is demonstrated by our IATF16949 certification, with ISO14001 and ISO13485 certifications actively in progress.
Future-Ready Capabilities
We are continuously investing in our future. Our planned relocation to a new, twice-expanded factory in 2026, equipped with state-of-the-art new production lines, will significantly enhance our capacity and technological advancements.
The Jindu Process: From Concept to Optimized Cooling
We streamline the journey to your ideal thermal solution
Discovery & Requirements Analysis
We start by understanding your project's specific thermal needs, power dissipation, and environmental factors.
Custom Design & Simulation
Our expert engineers develop a tailored Brazed Liquid Cold Plate design, validated through advanced CAD modeling and comprehensive thermal simulations using ANSYS Fluent.
Prototyping & Validation
We rapidly produce high-quality prototypes for your evaluation, followed by rigorous testing to confirm performance, reliability, and adherence to all specifications.
Manufacturing & Quality Control
Leveraging our extrusion and CNC capabilities, we proceed with precision manufacturing, with strict quality checkpoints at every stage.
Delivery & Ongoing Support
We ensure on-time delivery of your optimized brazed cold plates and offer continuous technical support for seamless integration and long-term performance.
Related Products
FAQ
Our vacuum-brazed cold plates feature:
Aerospace-grade bonding with ≤0.01% void ratio (vs industry standard 0.1%)
Hybrid copper-aluminum construction - Copper flow channels with aluminum housing for optimal cost/performance
| Option | Aluminum | Copper | Hybrid |
| Max Size | 600×400mm | 400×300mm | 500×350mm |
| Min Channel | 0.3mm | 0.2mm | 0.25mm |
| Pressure Rating | 8MPa | 15MPa | 10MPa |
| Thermal Conductivity | 167W/mK | 398W/mK | 210W/mK (effective) |
| Parameter | Jindu | Industry Average |
| Shear Strength | 150MPa | 90-110MPa |
| Leak Rate | <1×10⁻⁹ Pa·m³/s | <1×10⁻⁷ Pa·m³/s |
| Channel Precision | ±0.05mm | ±0.1mm |
Yes, our multi-circuit designs feature:
Independent flow paths with separate inlets/outlets
Zone isolation for critical components
Up to 5 zones in single plate
Prototypes: 2-3 weeks (MOQ 1pc)
Mass production: 10,000pcs/month capacity
Lead time: 4 weeks for standard designs
Brazed plates excel in:
✔ Ultra-high pressure systems (up to 15MPa)
✔ Complex microchannel designs (<0.5mm channels)
✔ Applications requiring perfect internal cleanliness (medical/laser)
ΔT <3°C @500W with water coolant (1L/min)
Flow uniformity >95% across parallel channels
Hot spot reduction up to 40% vs extruded designs
3D-formed headers for space-constrained installations
Direct component mounting with:
Embedded copper pads (for IGBTs)
Threaded inserts (M3-M8)
Custom coatings:
Anodizing (MIL-A-8625)
Ni-PTFE composite (anti-fouling)
100% helium leak testing (10⁻⁹ sensitivity)
Destructive cross-section analysis (1 per batch)
We offer:
Complete thermal test reports (per MIL-STD-810)
Flow distribution mapping
Material certification (mill test reports)