3D Patterned Piezoelectric Device for Energy Output
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Solution Overview
Problem
Conventional piezoelectric devices with cantilever-type structures exhibit low energy output due to localized deformation, resulting in inefficient energy conversion compared to their overall volume.
Innovation Solution
A piezoelectric device with a 3-dimensional patterned surface layer and a piezoelectric material layer forming a 3-dimensional interface, where the substrate can include materials like solid polymers, silicon, or ceramics, and the piezoelectric material can be made of ceramics or polymers, enhancing energy conversion efficiency by expanding the stress dispersion range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a conventional cantilever-type structure is used, then the device structure is simple, but the energy output is low due to localized deformation
Solution Approach 1:
The patent transitions from a conventional 2D flat substrate to a 3D patterned substrate with micropillars, microwells, or other three-dimensional surface features. This dimensional change allows the piezoelectric material to experience deformation in multiple directions and locations simultaneously, significantly increasing the energy output while maintaining a relatively simple overall device structure.
2Productivity
If a flat substrate is used, then the manufacturing process is simple, but the energy conversion efficiency per volume is low
Solution Approach 1:
The patent introduces localized 3D patterns (such as micropillars, microwells, or concavo-convex structures) at specific regions of the substrate surface. These localized structural modifications create areas of enhanced stress concentration and deformation, improving energy conversion efficiency in those regions without requiring complete redesign of the entire manufacturing process.
3Power
If the piezoelectric material layer is made thin, then the device is lightweight, but the energy output is reduced
Solution Approach 1:
By creating 3D patterns on the substrate surface, the patent increases the effective surface area and volume of the piezoelectric material layer without proportionally increasing the overall device thickness or weight. The 3D structures allow for greater energy output within the same volume constraint, enabling thin, lightweight devices with enhanced power generation capability.
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
The 3-dimensional interface design improves piezoelectric output by allowing the material to displace in various directions, increasing energy conversion efficiency within the same volume compared to devices with flat substrates.
Implementation Method 1
there are techniques using an electrostatic effect, an electromagnetic effect, or a piezoelectric effect. Here, a technique using the piezoelectric effect exhibits so high conversion efficiency
Data Source
AI summary
Provided are a piezoelectric device and a method of fabricating the same and the piezoelectric device may include a substrate including a 3-dimensional pattern surface layer; and a piezoelectric material layer, which is formed on the pattern surface layer and forms a 3-dimensional interface with the pattern surface layer.