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In development

Flexible thermal pad

A flexible thermal-structure design based on a copper mesh/copper fiber 3D skeleton. Through active fusion-bonding technology, high thermal conductivity particles such as diamond are fixed to a flexible metal skeleton, forming a 3D thermal conductive phase network intended to improve conformity on complex interfaces.

Core performance metrics

Thermal conductivity (in-plane, design range)200–400 W/m·K
Thermal conductivity (through-thickness, design range)30–150 W/m·K
Flexible deformation capabilityBendable
Coefficient of thermal expansionClose to copper
Thickness range0.5–3 mm

Technical advantages

3D skeleton structure

Uses copper mesh or copper fiber as 3D skeleton, providing continuous thermal conduction channels. The skeleton itself has good flexibility, adapting to uneven interfaces and thermal stress deformation.

Active fusion bonding

Through active fusion-bonding technology, high thermal conductivity particles such as diamond and boron nitride are firmly bonded to the metal skeleton, forming stable chemical metallurgical connections for long-term reliability.

Flexibility and thermal conductivity

Used to improve conformity on complex interfaces, providing flexibility and interface adaptability while maintaining thermal conduction.

Technical principle & preparation

Core structure design

High-performance thermal skeleton selection

Uses micron-scale metal mesh or directionally aligned metal fibers as a 3D thermal scaffold, relying on metal thermal conductivity and ductility to form a continuous heat-conduction network.

  • Mesh structure: Regular layout and controllable thickness, suited to large-area consistency.
  • Fiber network: 3D interweaving with good flexibility, able to conform to non-flat interfaces.

High thermal conductivity composite reinforcement

Modified carbon-based particles (e.g., diamond, boron nitride) are placed in the pores of the metal skeleton. Interface treatment forms a metallurgical bond with the skeleton and reduces physical gaps at the interface.

Diamond reinforcement
Provides vertical thermal conduction channels
Ceramic-based reinforcement
Balances high thermal conductivity with system electrical insulation needs

Preparation process

1

Interface activation pretreatment

Clean the metal skeleton and adjust its surface energy to remove the microscopic oxide layer, improving wettability and bond strength in subsequent brazing.

2

Multi-dimensional dispersion filling

Disperse coated reinforcement particles and active interface components, then use vacuum assist or physical energy to place the filler in the skeleton pores and form a continuous thermal path.

3

Controlled physical metallurgical bonding

Under vacuum or a protective atmosphere at low pressure, a set thermal cycle drives in-situ reaction of active elements at the interface, forming a carbide/nitride interface and lowering interface thermal resistance.

4

Precision post-processing and customization

Controlled cooling releases internal stress and yields a flexible structure. Surfaces can be flattened or cut to drawing as required.

Application prospects

Evolution of high thermal conductivity interface materials

This design combines metal strength, carbon-based heat transfer, and a compliant structure. It is a design direction for high-performance thermal interface material (TIM) scenarios:

  • New energy powertrain: Ensures long-term thermal safety of battery packs and motor controllers.
  • High-integration comm base stations: Addresses extreme heat flux density of 5G/6G RF modules.
  • Lightweight electronics: heat spreading under lightweight requirements.
Explore thermal management applications

Customized solutions

CuFeng provides R&D services from skeleton design and particle formulation optimization to finished-product specification customization. For customer-specific heat flux density needs, performance can be tailored by adjusting interface stress and reinforcement distribution.

Contact application engineer

Related patent technology

Core intellectual property layout

Patent filings cover material composition, interface engineering, and core preparation processes.

Core invention patent

A flexible high-thermal-conductivity composite reinforced by active fusion-bonding metal skeleton and its preparation method

This patent defines in detail a systematic method using metal mesh/fiber as structural base and in-situ metallurgical welding to fix high thermal conductivity particles. Its core value is replacing traditional physical doping with interface chemical bonding, intended to improve interface heat transfer efficiency and aging resistance.

Application No.: 202511963728.9

Discuss the design

Welcome to discuss the structural design and application scenarios with the technical team