Micro Fluid Actuator Miniaturization via Shallow Chamber Design
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Solution Overview
Problem
Existing micro fluid actuators have not been successfully miniaturized to the micrometer scale, limiting their size reduction and fluid transportation capacity.
Innovation Solution
A manufacturing method using the 1P6M or 2P4M process, involving a semiconductor thin film for micro fluid actuators, where a substrate with multiple layers is processed to create a shallow chamber depth, allowing for increased fluid compression ratios through the deposition of electrode layers and etching techniques to form flow channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the depth of the thin film chamber is reduced to micrometer scale, then the size of the micro fluid actuator is miniaturized, but the fluid compression ratio decreases
Solution Approach 1:
The patent changes the geometric parameters of the chamber, specifically maintaining a shallow depth while increasing the horizontal area. This parameter transformation allows the chamber volume to be controlled at micrometer scale while preserving sufficient fluid compression ratio by compensating through increased planar dimensions rather than depth.
Solution Approach 2:
Instead of reducing compression ratio through vertical depth reduction, the patent transitions to horizontal area expansion to maintain volume. This dimensional shift from vertical to horizontal scaling enables micrometer-scale actuator size while preserving fluid compression capability through increased surface area of the thin film chamber.
2Volume of moving object
If the depth of the thin film chamber is reduced to micrometer scale, then the micro fluid actuator achieves micrometer scale miniaturization, but the fluid transportation capacity is reduced
Solution Approach 1:
The patent compensates for reduced vertical depth by expanding the horizontal area of the thin film chamber. This dimensional transformation maintains the chamber volume at micrometer scale while preserving fluid transportation capacity through increased planar dimensions, allowing sufficient fluid intake and output areas.
Solution Approach 2:
The patent adjusts the geometric parameters by reducing depth while increasing area, transforming the chamber shape from vertically-oriented to horizontally-oriented. This parameter change enables the chamber to maintain micrometer-scale volume while preserving adequate fluid transportation capacity through optimized surface area-to-volume ratio.
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 the miniaturization of micro fluid actuators to the micrometer scale, enhancing their fluid compression ratio and operational efficiency.
Implementation Method 1
depositing a piezoelectric actuation layer
Implementation Method 2
applying lithography dry etching to a portion of the first protection layer
Data Source
AI summary
A manufacturing method of micro fluid actuator includes: providing a substrate; depositing a first protection layer on a first surface of the substrate; depositing an actuation region on the first protection layer; applying lithography dry etching to a portion of the first protection layer to produce at least one first protection layer flow channel; applying wet etching to a portion of a main structure of the substrate to produce a chamber body and a first polycrystalline silicon flow channel region, while a region of an oxidation layer middle section of the main structure is not etched; applying reactive-ion etching to a portion of a second surface of the substrate to produce at least one substrate silicon flow channel; and applying dry etching to a portion of a silicon dioxide layer to produce at least one silicon dioxide flow channel.