Electroplated RFID Antenna Pattern Fabrication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for fabricating conductive patterns, particularly for RFID devices, are costly and face challenges in ensuring continuity and efficiency, such as expensive etching processes and issues with conductive ink continuity.
Innovation Solution
The method involves electroplating a conductive pattern atop a conductive substrate, using a patterned conductive ink layer that includes carbon-containing ink, and separating the pattern from the substrate, with electroplated links providing electrical coupling between components like RFID chips and antennas, and using a dielectric layer for adhesion and separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If etching is used to fabricate conductive patterns, then manufacturing precision can be achieved, but the process becomes expensive and complex
Solution Approach 1:
The patent replaces the mechanical etching process with an electrochemical deposition process. Instead of removing material through etching, conductive material is deposited onto a conductive substrate through electroplating, forming the desired conductive patterns. This substitution eliminates the complexity and cost associated with etching while maintaining manufacturing precision.
Solution Approach 2:
The patent changes the fundamental parameter of the fabrication process from subtractive (etching) to additive (electroplating). By controlling electroplating parameters such as current density, plating time, and electrolyte composition, precise conductive patterns are formed without the complexity of etching processes.
2Ease of manufacture
If conductive ink is deposited to form patterns, then cost can be reduced, but continuity of the conductive elements deteriorates
Solution Approach 1:
The patent replaces conductive ink deposition with electrochemical deposition. Instead of relying on ink particles that may not form continuous paths, conductive material is electrochemically deposited to form truly continuous conductive patterns, ensuring electrical connectivity while maintaining cost-effectiveness.
Solution Approach 2:
The patent changes the deposition mechanism from physical ink placement to electrochemical material transfer. By controlling electroplating parameters, continuous conductive paths are formed with guaranteed electrical connectivity, eliminating the continuity problems associated with ink-based methods.
3Reliability
If electroplating is used to form conductive patterns, then pattern continuity is enhanced and costs reduced, but additional process steps are required
Solution Approach 1:
The patent combines multiple functions into the electroplating process itself. The electroplating step simultaneously forms the conductive pattern, ensures continuity, and creates the desired thickness and conductivity. This merging of functions reduces the need for separate process steps despite the added electroplating operation.
Solution Approach 2:
The electroplating process serves multiple purposes: it forms the conductive pattern geometry, ensures continuous conductive paths, controls material thickness, and provides appropriate surface properties for subsequent processing. This multi-functionality compensates for the additional process step by eliminating the need for multiple separate operations.
4Strength
If conductive patterns are plated directly on dielectric substrates, then adhesion is improved, but separation and transfer capabilities are lost
Solution Approach 1:
The patent segments the substrate system into distinct functional layers: a conductive substrate for pattern formation, a dielectric layer for isolation and structural support, and a release layer for separation. This segmentation allows the conductive pattern to be strongly adhered to the conductive substrate during fabrication while enabling subsequent separation and transfer to the final application substrate.
Solution Approach 2:
The patent introduces a dielectric layer as an intermediary between the conductive substrate and the final application substrate. This intermediate layer provides adhesion during fabrication, electrical isolation, and controlled release capabilities, enabling the conductive pattern to be transferred to different substrates as needed.
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
This approach reduces costs, enhances pattern continuity, and improves the efficiency of RFID device production by using electroplated conductive patterns that are easily separable and adherable, leading to more reliable and cost-effective RFID devices.
Implementation Method 1
a conductive pattern is formed by plating atop a conductive substrate
Implementation Method 2
a conductive pattern is formed by plating on a patterned conductive ink layer that includes a carbon-containing ink
Data Source
AI summary
A method of forming an electrically-conductive pattern includes selectively electroplating the top portions of a substrate that corresponds to the pattern, and separating the conductive pattern from the substrate. The electroplating may also include electrically connecting the conductive pattern to an electrical component. Conductive ink, such as ink including carbon particles, may be selectively placed on the conductive substrate to facilitate plating of the desired pattern and/or to facilitate separation of the pattern from the substrate. An example of a conductive pattern is an antenna for a radio-frequency identification (RFID) device such as a label or a tag. One example of an electrical component that may be electrically connected to the antenna, is an RFID strap or chip.