Metal Precursor Polymer Filaments for Additive Manufacturing
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Solution Overview
Problem
Current additive manufacturing processes, particularly fused filament fabrication, face challenges in integrating conductive traces directly into printed parts without requiring separate post-processing techniques, which can be cumbersome and inaccurate, especially on complex shapes and non-planar surfaces.
Innovation Solution
Incorporating a metal precursor into polymer filaments that can be activated by laser irradiation to form metal islands, allowing for the direct creation of conductive traces during or after the printing process, eliminating the need for additional post-processing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate post-processing techniques are used to create conductive traces on printed parts, then conductive traces can be added to printed objects, but the process becomes cumbersome and inaccurate, especially on complex shapes and non-planar surfaces
Solution Approach 1:
The patent combines the conductive trace creation process with the additive manufacturing process by incorporating metal precursor particles directly into the polymer filament. This merging eliminates the need for separate post-processing steps and enables direct writing of conductive traces during printing, thereby improving accuracy while reducing process complexity
Solution Approach 2:
The metal precursor is pre-incorporated into the polymer filament before the printing process begins. This preliminary action ensures that the conductive material is already positioned within the printed object during manufacturing, eliminating the need for subsequent post-processing steps to add conductive traces
2Productivity
If metal precursor is incorporated into polymer filaments for direct conductive trace formation, then processing efficiency and adhesion are improved, but additional laser irradiation activation step is required
Solution Approach 1:
The patent merges two previously separate processes (additive manufacturing and conductive trace creation) into a single integrated process. By incorporating metal precursor into the filament and activating it during or after printing through laser irradiation, the system achieves both structural fabrication and conductive pattern creation in one workflow, improving productivity without significantly increasing device complexity
Solution Approach 2:
The patent utilizes laser irradiation to change the physical and chemical parameters of the metal precursor, transforming it from an inactive particulate state to an active metal state that forms conductive traces. This parameter change enables the metal precursor to fulfill its conductive function without requiring additional material deposition steps
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 accurate and integral formation of conductive traces within printed objects, improving processing efficiency and adhesion, while maintaining the structural integrity and complexity of the printed parts.
Implementation Method 1
a metal precursor contacting the filament body and activatable to form metal islands upon laser irradiation
Data Source
AI summary
Additive manufacturing processes, such as fused filament fabrication, may be employed to form printed objects in a range of shapes. It is sometimes desirable to form conductive traces upon the surface of a printed object. Conductive traces and similar features may be introduced in conjunction with fused filament fabrication processes by incorporating a metal precursor in a polymer filament having a filament body comprising a thermoplastic polymer, and forming a printed object from the polymer filament through layer-by-layer deposition, in which the metal precursor remains substantially unconverted to metal while forming the printed object. Suitable polymer filaments compatible with fused filament fabrication may comprise a thermoplastic polymer defining a filament body, and a metal precursor contacting the filament body, in which the metal precursor is activatable to form metal islands upon laser irradiation.