Micro-molded Neural Probes with Rounded Edges for Reduced Tissue Damage
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Solution Overview
Problem
Current microelectrode devices for neural interfaces are not fully customizable, reliable, and affordable, limiting researchers' ability to conduct engineering and physiological tests, and delaying potential clinical applications due to issues like fragility, sharp edges, cumbersome integration, limited substrate material choices, and high costs.
Innovation Solution
The development of micro-molded electrodes with customizable dimensions and high aspect ratios, featuring multiple individually addressable sensors, conductive traces, and a coating for protection, which can be manufactured using a novel micro-molding technique allowing for precise and reproducible fabrication from various materials, including silicon and glass, and can be produced at a lower cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional microelectrode devices are used, then basic recording and stimulation functions are achieved, but customization capability is limited and costs are high
Solution Approach 1:
The electrode array is divided into multiple independently controllable channels, each with its own electrode and associated circuitry. This segmentation enables individual customization of each channel's geometric parameters and electrical characteristics while maintaining a modular overall structure that reduces manufacturing complexity.
Solution Approach 2:
The patent implements adjustable and reconfigurable electrode parameters including variable pitch, length, and geometric configurations. The electrode array can be dynamically adapted to different neural interface requirements through programmable control of individual channels, providing versatility without requiring completely custom devices for each application.
2Reliability
If conventional microelectrode devices are used, then recording and stimulation functions are provided, but reliability is insufficient due to fragility and sharp edges
Solution Approach 1:
The electrode tips and edges are designed with rounded and curved geometries rather than sharp angles. This curvature reduces mechanical damage to surrounding tissue during insertion and chronic operation, while the rounded edges also reduce stress concentration points that could lead to device failure, thereby improving overall reliability.
Solution Approach 2:
The patent incorporates protective coatings and encapsulation layers on the electrode structure before implantation. These protective measures cushion the fragile electrode components against mechanical damage and biological degradation, preventing failures before they occur and improving long-term device reliability.
3Manufacturing precision
If conventional microelectrode devices are used, then basic functionality is achieved, but manufacturing precision and reproducibility are inadequate
Solution Approach 1:
The patent employs photolithography and semiconductor fabrication techniques to create precise copies of electrode patterns on a substrate. These copying methods enable high-precision reproduction of electrode geometries with controlled pitch and dimensions, ensuring manufacturing precision while using standardized processes that improve reproducibility across batches.
Solution Approach 2:
The manufacturing process allows for precise control and adjustment of key parameters including electrode pitch, length, width, and spacing. By implementing variable parameter control during fabrication, the patent achieves high manufacturing precision for customized electrode configurations while maintaining reproducibility through controlled process variations.
4Quantity of substance
If conventional microelectrode devices are used, then basic recording is possible, but channel count and data generation capability are limited
Solution Approach 1:
The patent integrates multiple electrode channels and their associated signal processing circuitry into a single compact neural interface device. By merging the functions of multiple channels while maintaining independent control and signal acquisition capabilities, the patent achieves high channel counts without proportionally increasing overall device complexity.
Solution Approach 2:
The neural interface device is designed with multi-functional capabilities, where a single integrated platform can perform recording, stimulation, and data processing across multiple channels simultaneously. This universal design allows the device to handle high channel counts by consolidating functions that would otherwise require separate devices, reducing integration complexity.
Data Source
AI summary
A method of manufacturing a micro-molded electrode having multiple individually addressable sensors along a shaft can include forming a recess in a mold substrate, depositing a structural material therein, depositing a conductive material at specific locations, providing a coating, and removing the mold substrate. A micro-molded electrode having a base tapering to at least one shaft can include an electrode substrate, multiple individually addressable sensors, and a coating.