3D Object Conductivity Enhancement via Selective Dispensing
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Solution Overview
Problem
Existing additive manufacturing techniques face challenges in precisely increasing the electrical conductivity of 3D objects, particularly at specific locations on their external surfaces, without affecting their optical, surface properties, or requiring direct line-of-sight access to topological features.
Innovation Solution
A device comprising a coater, dispenser, and treatment portion that coats build material layer-by-layer, dispenses electrically conductive material at selected locations, and applies energy or chemical treatments to enhance conductivity, allowing for precise control and contiguous conductivity despite surface discontinuities, using methods like electroplating, electroless plating, or thermal treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional additive manufacturing techniques are used to increase electrical conductivity at specific locations, then manufacturing precision is improved, but device complexity increases due to the need for masks and direct line-of-sight access to topological features
Solution Approach 1:
The patent employs an intermediary substance (conductive polymer slurry or coating material) that can be applied to the 3D object's surface and then treated to enhance conductivity. This intermediary approach eliminates the need for direct line-of-sight access and masks, as the slurry can be applied via spray or dip methods that work around complex geometries. The intermediary material serves as a vehicle for delivering conductive particles to target locations without requiring complex manufacturing equipment.
Solution Approach 2:
The patent replaces mechanical application methods (such as manual painting, masking, and precision positioning equipment) with chemical and physical treatment processes. Conductive particles are applied to the surface and then activated through chemical reactions or thermal treatments that enhance conductivity without requiring mechanical precision or line-of-sight access. This substitution of mechanical systems with chemical/physical processes simplifies the manufacturing device requirements.
2Manufacturing precision
If conventional techniques are used to enhance conductivity at selected locations, then manufacturing precision is improved, but ease of manufacture deteriorates due to requirements for masks and direct line-of-sight access
Solution Approach 1:
The conductive polymer slurry acts as an intermediary that simplifies the manufacturing process. Instead of requiring direct application of conductive material to specific locations with masks and line-of-sight access, the slurry is applied broadly and then selectively activated through treatment. This intermediary approach makes the process easier to manufacture while maintaining precision, as the slurry can be applied via simple spray or dip methods that are tolerant of complex geometries.
Solution Approach 2:
The patent utilizes parameter changes in the treatment process (such as temperature, chemical concentration, or exposure time) to control where conductivity is enhanced. By adjusting these parameters during the treatment phase, the process achieves precise conductivity enhancement at selected locations without requiring complex manufacturing equipment or masks. The parameter changes enable selective activation of conductive particles in response to the treatment conditions.
3Illumination intensity
If conductive material is applied to maintain appearance and properties, then optical properties are preserved, but electrical conductivity enhancement becomes more difficult to achieve uniformly
Solution Approach 1:
The patent uses composite materials that combine conductive particles with a polymer matrix to create a slurry that maintains the optical appearance of the 3D object while enabling conductivity enhancement. The composite structure allows the conductive particles to be distributed within the polymer, providing both aesthetic appearance and electrical functionality. This composite approach resolves the contradiction by integrating both requirements into a single material system that can be applied uniformly.
Solution Approach 2:
The patent applies local quality treatment by selectively enhancing conductivity at specific locations while maintaining the overall appearance and properties of the 3D object. The conductive slurry is applied across the surface, and then local treatment (such as selective heating or chemical exposure) activates conductivity only where needed. This local quality approach allows uniform application of the composite material while achieving non-uniform conductivity enhancement at specific locations, preserving optical properties where conductivity is not required.
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 precise and accurate enhancement of electrical conductivity at specific locations on 3D objects, facilitating bonding with external conductive elements and maintaining the appearance and properties of the objects, without the need for masks or direct line-of-sight access.
Implementation Method 1
The treatment portion is to treat the 3D object to increase electrically conductivity on the external surface of the 3D object at the at least some selected locations
Implementation Method 2
using methods like electroplating, electroless plating, or thermal treatments
Implementation Method 3
using methods like electroplating, electroless plating, or thermal treatments
Data Source
AI summary
A device includes a coater, a dispenser, and a treatment portion. The coater is to coat, layer-by-layer, a build material relative to a build pad to form a 3D object. The dispenser is to at least dispense a fluid including a first at least potentially electrically conductive material in at least some selected locations of an external surface of the 3D object. The treatment portion is to treat the 3D object to substantially increase electrically conductivity on the external surface of the 3D object at the at least some selected locations.