Conductive Pathway Deposition on Polymer Panels Without Heat Damage

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Solution Overview

Problem

Conventional wire harness production is predominantly manual due to the difficulty in automating processes such as routing wires and assembling connectors, and existing additive manufacturing (AM) techniques damage polymer substrates with lower melting points when depositing conductive materials.

Innovation Solution

A method and system using a laser emitter to heat conductive material at a distance from the polymer substrate, avoiding damage while depositing a network of conductive pathways on a polymer substrate, and a mechanical mechanism to maneuver the deposition process, enabling automated manufacturing of connectivity panels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If existing additive manufacturing techniques are used to deposit conductive materials on polymer substrates, then automated production is achieved, but the polymer substrate is damaged due to its lower melting point

Engineering Contradiction:

Improveautomated productionVSAvoidsubstrate damage

Core Design Contradiction:

Extent of automationVSObject-affected harmful factors

Solution Approach 1:

A support structure comprising a build plate and support members is introduced as an intermediary between the laser heating system and the polymer substrate. The support structure absorbs and distributes the thermal energy, preventing direct damage to the substrate while enabling the laser to heat the conductive material to the required temperature for deposition.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system dynamically adjusts laser parameters (power, speed, focal position) and support structure parameters (temperature, geometry) to control the thermal field. By changing these parameters, the process achieves sufficient heating of conductive material without exceeding the substrate's melting point, enabling automated deposition without damage.

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If manual wire harness production methods are used, then process flexibility is maintained, but production time and labor costs increase

Engineering Contradiction:

Improveprocess flexibilityVSAvoidproduction time

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The manual mechanical processes of wire routing, stripping, and connector assembly are replaced with an automated additive manufacturing system. The system uses computer-controlled deposition of conductive materials to create integrated wire harness structures directly on or within the polymer substrate, eliminating manual labor while maintaining design flexibility through digital modeling.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention merges multiple discrete manufacturing operations (substrate preparation, wire routing, connector attachment, insulation) into a single additive manufacturing process. The conductive pathways, structural elements, and insulation features are deposited simultaneously in one automated process, dramatically reducing production time while maintaining flexibility through programmable deposition patterns.

Inventive Principle:

Principle #5Merging (Combining)

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

The method allows for automated, cost-effective production of lightweight and flexible connectivity panels with embedded conductive pathways that can replace conventional wire harnesses, reducing installation time and material costs while maintaining substrate integrity.

Implementation Method 1

aiming, by a laser light emitter, a laser light at a target location of the first path to cause heating of the conductive material to a temperature that softens the conductive material

Methodology Applied

Scientific EffectLaser heating: Laser

Implementation Method 2

heat the conductive material to a temperature that softens the conductive material

Methodology Applied

Scientific EffectThermal softening: Melting

Implementation Method 3

the softened conductive material sufficiently cools to harden on the polymer substrate

Methodology Applied

Scientific EffectThermal cooling and hardening: Freezing

Data Source

PatentUS20260089845A1Additive manufacturing techniques for producing a network of conductive pathways on a substrate

Publication Date: 2026.03.26 YAZAKI CORP

AI summary

The disclosed embodiments include an automobile panel that can include a polymer substrate, a network of conductive pathways, and connectors coupled to ends of the network of conductive pathways. The network of conductive pathways can include conductive material disposed in cavities forming a network of channels in the polymer substrate. The conductive material at least partially encapsulates by the polymer substrate. The connectors are connectable to automotive electronic devices thereby forming electrical circuits that include the network of conductive pathways and the automotive electronics.