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Bonded Fin Heat Sinks

Ultra-High Fin Density: Bonded fin heat sinks achieve aspect ratios up to 44:1 or higher, greatly increasing surface area and improving heat dissipation efficiency compared to traditional extruded heat sinks

Superior Thermal Performance: These heat sinks can reduce thermal resistance by up to 50-66%, making them ideal for compact, high-power applications requiring exceptional cooling performance

Flexible Material Options: Supports both aluminum and copper fins, or hybrid combinations like copper fins on an aluminum base, optimizing between cost, weight, and thermal conductivity

Customizable Fin & Base Design: Fins are fabricated from sheet or extrusion and bonded into a grooved aluminum or copper base, allowing complete customization of fin height, spacing, and thickness

Reliable Bonding Methods: Fins are attached using thermally conductive epoxy, soldering, or brazing-selected based on thermal requirements, structural integrity, and production scale

Low Thermal Resistance Capability: Designed to perform in forced-air environments with thermal resistance as low as 0.0175 Â°C/W, suitable for IGBT modules and power electronics

Compatibility with Active Cooling Systems: Bonded fin heat sinks can be integrated with fans, heat pipes, vapor chambers, or liquid cooling solutions for advanced thermal management

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Bonded Fin Heat Sinks Product

Customization Capabilities

We provide tailored bonded fin heat sinks for high-performance applications, offering advanced design flexibility in materials, fin geometry, bonding methods, and system-level integration.

Fin Aspect Ratio: Up to 44:1 or higher for maximum surface area
Fin Materials: Aluminum, copper, or hybrid metal configurations
Base Materials: Aluminum or copper, extruded or machined options
Bonding Methods: Thermally conductive epoxy, soldering, or brazing
Fin Fabrication: Customizable height, thickness, spacing, and profile shape
Cooling Integration: Supports heat pipe, vapor chamber, fan, or liquid-cooled system integration
Thermal Resistance: Target values as low as 0.0175 Â°C/W under forced convection

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Why Partner with Sinoextrud for Your Bonded Fin Heat Sinks Needs?

We are more than just an aluminum profile supplier — we’re your efficient, reliable, long-term partner.

With Us, You Get:Faster turnaround，Stable quality，Competitive pricing，End-to-end support.

Large-Scale Manufacturing：Our factory spans 1,000 mu (about 667,000 m²), with full in-house capabilities from aluminum smelting and billet casting to extrusion, surface treatment, and CNC machining.

One-Stop Solution：With 43 extrusion lines (500–5500 tons) and a dedicated mold partner, we provide fast production, custom profiles, and integrated services to simplify your supply chain.

Quality You Can Trust：Strict quality control ensures consistent dimensions, strength, and finish, reducing your risk and increasing reliability.

Fast Delivery & Cost Efficiency：Self-produced billets, in-house processing, and batch production mean faster lead times and lower overall costs.

Advanced Finishing Options：Anodizing and both vertical and horizontal powder coating lines deliver durable, high-quality surface finishes tailored to your product needs.

Factory Overview

Furnace workshop

Aluminum bar production

Mold Warehouse

500-5500 Tons Extruder

Spraying workshop

Anodizing workshop

Deep Processing Workshop

CNC Machining Workshop

Finished goods warehouse

Finished goods warehouse

Finished goods warehouse

Export warehouse

5500 Ton Extrusion Press

Aluminum extrusion press

Large Aluminum Extrusion Line

Aluminum extrusion production line

Extrusion workshop

IATF 16949 Certification

TUV

Finished goods warehouse

Export warehouse

-Standard Packing Option-

* Long bar length profiles 3.0-6.0 meters*

Protective Film

Shrink Sleeve

Brown Paper

Craft Paper

* Short bar length profiles 0.3-3.0 meters*

EPE Foam

Poly Bag

Wooden Crate

Wooden Case

-Loading & Shipment-

Pallet Loading

Bulk Loading

LCL Loading

Expedited Express

STEPS

How to work with us

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Quote & Estimation
Begin with a thorough evaluation of the design's feasibility, followed by a prompt, detailed estimate.
Sample & Test
Creating a prototype to assess dimensions and ensure the mold's precision aligns with the requirements.
Extrude & Finish
Producing the aluminum profile with pinpoint accuracy to the given specifications and applying desired finishes.
Pack & Deliver
Tailored packaging for the extruded profiles, ensuring safe and efficient loading for prompt delivery.

Bonded Fin Heat Sinks-FAQ's

What is a bonded fin heat sink?

It is a high-density heat sink where individual fins are bonded into a grooved base, enabling greater thermal surface area than standard extrusions.

What materials can be used for the fins and base?

Aluminum and copper are commonly used; combinations like copper fins with aluminum bases are also available.

What bonding methods are used?

Depending on application needs, fins are bonded using thermal epoxy, soldering, or brazing.

What are the thermal benefits of bonded fin heat sinks?

They can reduce thermal resistance by 50-66% compared to conventional heat sinks, enhancing performance in compact layouts.

Are they suitable for high-power forced-air systems?

Yes, bonded fin sinks perform well under forced convection with extremely low thermal resistance values.

Can I request a custom size or fin layout?

Absolutely-fin geometry, spacing, height, and material combinations can be fully customized to meet thermal and dimensional constraints.

Can bonded fin sinks be used with other cooling systems?

Yes, they can be paired with fans, vapor chambers, heat pipes, or liquid cooling to maximize heat dissipation.

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Sinoextrud: Your Bonded Fin Heat Sinks Manufacturer

Bonded Fin Heat Sinks provide advanced thermal solutions for applications where traditional extrusion profiles fall short. Their high fin density and customizable design offer significant cooling performance advantages in constrained spaces.

These heat sinks are ideal for high-power electronics, lighting modules, and industrial controls-delivering low thermal resistance and scalable design options. Whether using copper, aluminum, or hybrid assemblies, they enable optimal balance between weight and conductivity.

Bonding methods such as epoxy, soldering, or brazing ensure strong thermal paths and durable mechanical bonds, while allowing designers freedom to specify precise fin geometry, aspect ratios, and base configurations.

For enhanced system integration, bonded fin designs support additional cooling technologies like fans, heat pipes, or vapor chambers-resulting in greater thermal performance under dynamic environmental conditions.

With full customization, fast prototyping, and reliable production capabilities, bonded fin heat sinks are the go-to solution for thermal engineers demanding performance, precision, and design flexibility.

Bonded Fin Heat Sinks : The Ultimate FAQ Guide

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