3D Nanoprobe Device Planar Stacking Alignment
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Solution Overview
Problem
Current nanoscale electrodes face challenges in manufacturing high-aspect-ratio structures with large areas on a wafer scale, often resulting in collapsed structures and reduced manufacturing efficiency due to vertical fabrication processes.
Innovation Solution
A 3D nanoprobe device is developed using a 2D plane lamination method, where nanoprobes are stacked and arranged in a multilayer structure, allowing for precise alignment and high-density integration with adjustable tip sizes and aspect ratios, and can be implanted into the human body for applications like intracellular recording and external stimulus application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If vertical fabrication processes are used to manufacture nanoscale electrodes, then manufacturing can be performed, but high-aspect-ratio structures collapse and manufacturing efficiency decreases
Solution Approach 1:
The patent transitions from vertical fabrication to horizontal planar stacking, arranging nanoprobes in a layered configuration where multiple nanoprobes are stacked side-by-side in the plane rather than growing vertically. This dimensional change allows high-aspect-ratio structures to be formed without collapse, as each nanoprobe layer maintains structural integrity through planar support and alignment mechanisms.
Solution Approach 2:
The fabrication process is divided into discrete planar stacking steps, where individual nanoprobe layers are formed and aligned separately before being stacked together. This segmentation allows precise control over each layer's aspect ratio and alignment, preventing collapse while maintaining high manufacturing efficiency through standardized planar processing steps.
2Measurement precision
If nanoprobes are densely integrated, then measurement precision improves, but alignment precision becomes more difficult to maintain
Solution Approach 1:
The patent employs fluorescent or photoluminescent alignment marks with distinct optical properties that enable precise alignment of nanoprobe layers during fabrication. These alignment marks undergo color or fluorescence changes under specific illumination conditions, allowing optical alignment systems to accurately position each nanoprobe layer relative to others, thereby maintaining high alignment precision even with dense integration.
Solution Approach 2:
The fabrication process incorporates feedback mechanisms where alignment marks and reference features are used to verify and adjust the position of each nanoprobe layer during stacking. This feedback loop ensures that alignment precision is maintained despite increased density, as each layer's position is actively monitored and corrected during manufacturing.
3Measurement precision
If nanoprobe tip size is reduced, then spatial resolution improves, but manufacturing complexity increases
Solution Approach 1:
The patent uses parameter changes in the deposition and patterning processes to control nanoprobe tip size. By adjusting deposition thickness, etch depth, and patterning dimensions during planar fabrication, the tip size can be precisely controlled at the nanoscale without increasing fabrication complexity. The standardized planar processing steps make it easier to achieve uniform small tips compared to vertical methods.
Data Source
AI summary
A three-dimensional (3D) nanoprobe device includes a body portion including a plurality of body layers that are stacked, a plurality of nanoprobes respectively extending longitudinally from the body portion, with each of the plurality of nanoprobes comprising a plurality of extension layers that are stacked, and an electrode portion disposed on a portion of the body portion.