Patterned Metal Unit on Non-Planar Surfaces via Electroless Plating

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Solution Overview

Problem

Existing methods for forming metallic patterns on non-planar surfaces, such as concave or curved surfaces, suffer from poor resolution and short circuiting due to thermal transfer issues, making it difficult to achieve precise patterns.

Innovation Solution

A method involving an insulating article with a catalyst layer transferred onto its surface, followed by selective removal of the catalyst layer and subsequent electroless plating to form a patterned metal layer, using techniques like laser cutting for precise pattern definition and electroless plating to create a patterned metal unit with high resolution on non-planar surfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If thermal transfer method is used to form metallic material on receptor, then metallic material can be deposited on the surface, but thermal energy conduction to adjacent portions causes poor resolution and short circuiting

Engineering Contradiction:

Improvepattern resolutionVSAvoidshort circuiting

Core Design Contradiction:

Manufacturing precisionVSObject-generated harmful factors

Solution Approach 1:

The catalyst layer is segmented into discrete patterned regions through selective removal, creating isolated catalytic zones that prevent thermal conduction between adjacent metal deposits. This segmentation eliminates the continuous thermal path that causes short circuiting while maintaining precise pattern definition.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The catalyst layer is patterned and selectively removed before the electroless plating process begins. This preliminary patterning action defines the exact metal deposition zones in advance, preventing thermal energy from spreading to adjacent areas during the subsequent plating process, thereby avoiding short circuits.

Inventive Principle:

Principle #10Preliminary action

2Manufacturing precision

If thermal transfer is applied to form metallic material, then material deposition is achieved, but adjacent thermal conduction results in poor resolution

Engineering Contradiction:

Improvepattern definition accuracyVSAvoidpattern integrity

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The catalyst layer serves as an intermediary that is selectively removed to create isolated deposition zones. This intermediary structure allows precise control over where metal deposits form, preventing thermal conduction to adjacent areas and maintaining both high resolution and pattern integrity.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the thermal field-based transfer method with a chemically-controlled electroless plating process. The metal deposition is driven by chemical reduction at the catalyst sites rather than thermal conduction, eliminating the resolution-degrading thermal spread while ensuring reliable pattern formation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Shape

If conventional plating is used on non-planar surfaces, then coverage is achieved, but pattern precision is lost due to thermal spread

Engineering Contradiction:

Improvesurface coverageVSAvoidpattern accuracy

Core Design Contradiction:

ShapeVSManufacturing precision

Solution Approach 1:

The catalyst layer is applied with local quality variations - present only in specific patterned regions and absent in others. This local presence/absence control ensures that even on non-planar surfaces, metal deposits form only where catalyst is present, maintaining pattern accuracy while achieving coverage of the complex geometry.

Inventive Principle:

Principle #3Local quality

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 formation of precise patterned metal units on non-planar surfaces with improved resolution and prevention of short circuiting, allowing for accurate and reliable metallic patterns on complex geometries.

Implementation Method 1

In the step of thermally transferring the portion of the thermal transfer layer, thermal energy may be conducted to the other portion of the thermal transfer layer adjacent to the portion of the thermal transfer layer to be transferred

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

electrolessly depositing a metallic material on the receptor by growth of the metallic material on the catalytic material

Methodology Applied

Scientific EffectCatalysis: Catalysis

Implementation Method 3

forming a patterned metal layer on the patterned catalyst layer by an electroless plating technique

Methodology Applied

Scientific EffectElectroless plating:

Data Source

PatentUS10443131B2Method of forming patterned metal unit, and patterned article formed with the same

Publication Date: 2019.10.15 TAIWAN GREEN POINT ENTERPRISE

AI summary

A method of forming a patterned metal unit on an article. The method includes the steps of: providing an article that has an insulating surface; transferring a catalyst layer onto the insulating surface of the article, the catalyst layer including a catalytic material; removing a part of the catalyst layer to form a patterned catalyst layer; and forming a patterned metal layer on the patterned catalyst layer by an electroless plating technique to obtain a patterned metal unit that is constituted by the patterned catalyst layer and the patterned metal layer.