Sputtering Printhead for Room-Temperature Additive Manufacturing
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Solution Overview
Problem
Current metal additive manufacturing techniques require high temperatures, are costly, and produce inconsistent products with limited material range, while existing methods cannot efficiently handle both electrically conductive and insulating materials, and often necessitate special handling and post-processing in an inert atmosphere.
Innovation Solution
A sputtering printhead system that operates at room temperature and atmospheric pressure, using a plasma excitation source to sputter metals, ceramics, and plastics, with a reconfigurable design to handle different materials and a mechanism for advancing feedstock material, allowing for the deposition of both metals and non-metals without the need for vacuum conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high temperature laser sintering or arc-welding is used for metal additive manufacturing, then metal parts can be produced, but the cost increases at least ten times compared to conventional manufacturing and the mechanical properties are inconsistent
Solution Approach 1:
The invention changes the fundamental parameters of the additive manufacturing process by using sputtering deposition instead of melting, operating at room temperature rather than high temperature, and using physical vapor deposition instead of thermal processing. This resolves the contradiction by enabling consistent mechanical properties through controlled deposition while avoiding the excessive costs associated with high-temperature laser sintering equipment and inert atmosphere requirements
Solution Approach 2:
The invention replaces the thermal-mechanical system (laser sintering, arc-welding) with a physical vapor deposition system (sputtering). Instead of melting and fusing materials through heat, the system uses plasma-generated physical vapor deposition to deposit materials layer by layer, eliminating the need for high-temperature equipment and associated costs while improving mechanical property consistency
2Adaptability or versatility
If high temperature processing is used for metal additive manufacturing, then metal parts can be produced, but the temperature requirements limit the range of materials that can be processed
Solution Approach 1:
The invention fundamentally changes the processing temperature parameter from high temperature (required for melting) to room temperature (sufficient for sputtering deposition). This parameter change enables the processing of temperature-sensitive materials such as polymers, ceramics, and temperature-sensitive metals that cannot be processed by high-temperature laser sintering or arc-welding
Solution Approach 2:
The sputtering-based additive manufacturing system achieves universality by being able to process diverse materials including metals, ceramics, polymers, and temperature-sensitive materials all through the same room-temperature physical vapor deposition process, eliminating the material limitations imposed by high-temperature processing requirements
3Ease of operation
If laser sintering or arc-welding is used for metal additive manufacturing, then metal parts can be produced, but special handling in inert atmosphere and significant post-processing are required
Solution Approach 1:
The invention replaces thermal processing (laser sintering, arc-welding) with physical vapor deposition (sputtering), which inherently produces dense, defect-free deposits that do not require post-processing for defect repair. The process operates in atmospheric conditions rather than requiring inert atmospheres, eliminating the need for special handling equipment and post-processing steps, thereby significantly improving manufacturing efficiency
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 efficient and cost-effective additive manufacturing of 3D objects with improved mechanical properties and material consistency, capable of handling a wide range of materials, including semiconductors and oxides, while reducing production costs and eliminating the need for post-processing in an inert atmosphere.
Implementation Method 1
A plasma is produced in a bore of the annular structure and the material adjacent to one end of the bore is sputtered by the plasma
Implementation Method 2
a plasma excitation source configured to create a plasma within the bore of the annular structure
Data Source
AI summary
Sputtering printheads, additive manufacturing systems comprising the same, and methods for additive manufacturing are provided. Sputtering printheads of the present invention use a plasma to sputter a feedstock material which is directed towards a target. A printhead can include a heater to heat the feedstock to, or near, the material's melting point as it is being sputtered to increase the deposition rate. A convergent nozzle can also increase the deposition rate. Printheads of the present invention are readily reconfigurable such that the same printhead can be used to deposit different materials, such as metals and non-metals, in succession by replacing the feedstock material and making changes to a few settings. Additive manufacturing systems of the present invention can be operated at normal room temperatures and pressure.