Integrated Foil Cathode Structure for Complex Heatsink Deposition

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Solution Overview

Problem

Conventional electrochemical deposition manufacturing processes face challenges in making cathodes and are not fully utilized to produce parts with complex features, and existing cathodes are not integrated into the manufactured parts.

Innovation Solution

A method for making a cathode and heatsink using a metallic foil positioned in an electrolyte solution with a deposition anode array, where electrical energy is transmitted to deposit material onto the foil, forming heat exchange features and reinforcement structures, and the foil is retained using a retaining device to ensure sealing and planarity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional electrochemical deposition manufacturing processes are used, then parts can be manufactured with unique capabilities, but the processes are not fully utilized to make parts with difficult to manufacture features

Engineering Contradiction:

Improvecapability to manufacture complex partsVSAvoiddifficulty in making cathodes

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent merges the cathode and the final part into a single integrated structure. The metallic foil serves as both the cathode during electrochemical deposition and as an integral component of the manufactured part (e.g., heatsink base), eliminating the need for separate cathode fabrication and part assembly operations.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The metallic foil performs multiple functions: it acts as the cathode substrate for electrochemical deposition, provides thermal conduction pathways in the final part, and serves as a structural component. This multi-functionality resolves the contradiction by making the cathode-making process part of the overall manufacturing value chain.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Manufacturing precision

If conventional electrochemical deposition processes are used, then material can be deposited onto a cathode, but the cathode is not integrated into the manufactured part

Engineering Contradiction:

Improvematerial deposition accuracyVSAvoidcathode integration complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent combines the cathode substrate and the final part into one integrated structure. The metallic foil is retained as part of the final assembly through retaining devices that secure it to the build plate, eliminating the need for separate integration steps and reducing overall device complexity.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If metallic foil is used as cathode, then complex features can be efficiently integrated, but thermal resistance reduction and manufacturing capability enhancement are needed

Engineering Contradiction:

Improveintegration of complex featuresVSAvoidthermal resistance

Core Design Contradiction:

Adaptability or versatilityVSTemperature

Solution Approach 1:

The patent applies local quality by creating varying foil thicknesses in different regions of the metallic foil. Thinner regions provide lower thermal resistance pathways, while thicker regions provide structural support and deposition substrate. This localized variation optimizes both thermal management and manufacturing capabilities.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The final part combines the metallic foil substrate with electrochemically deposited material to create a composite structure. This composite construction provides both the thermal conduction benefits of the metallic foil and the functional features of the deposited material, achieving reduced thermal resistance while enabling complex feature integration.

Inventive Principle:

Principle #40Composite materials

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables the production of heatsinks with integrated cathodes that efficiently integrate complex features, reducing thermal resistance and enhancing manufacturing capabilities.

Implementation Method 1

transmitting electrical energy from the power source through the one or more deposition anodes of the plurality of deposition anodes, through the electrolyte solution, and to the metallic foil, such that material is deposited onto the metallic foil

Methodology Applied

Scientific EffectElectrochemical deposition: Electrodeposition

Implementation Method 2

This creates an electrochemical reduction reaction to occur at the cathode near the anode and deposition of material on the cathode

Methodology Applied

Scientific EffectElectrochemical reduction reaction: Redox Reactions

Data Source

PatentUS20250230571A1Cathode for electrochemical deposition process and associated method of making the same

Publication Date: 2025.07.17 FABRIC8LABS INC

AI summary

A method of making a cathode for an electrochemical deposition system includes positioning a metallic foil onto a support surface of a raised platform of a build plate so that the metallic foil is flush against the support surface. The method also includes retaining the metallic foil against the build plate via a retaining device so that the metallic foil is sealed to the build plate around the support surface and so that the metallic foil is proud of the retaining device. The cathode correspondingly includes the build plate, the metallic foil, and the retaining device.