MEMS Fluid Control Wafer Layout for Compact Multi-Flow Integration
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Solution Overview
Problem
Existing micro-electro-mechanical systems (MEMS) fluid control devices face challenges in minimizing the number of wafers required, which increases bonding complexity and manufacturing costs, especially when multiple flow components are needed.
Innovation Solution
The proposed solution involves configuring fluid control devices as a stack of wafers with flow components arranged in a concentric circular geometry, where each flow component encircles the previous one, reducing the lateral extension and maintaining a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If flow components are stacked in the thickness direction of MEMS, then the number of flow components can be increased, but the bonding complexity increases tremendously
Solution Approach 1:
The patent implements nesting by positioning flow components in a concentric circular arrangement where outer components encircle inner components within the same wafer plane. This allows multiple flow components to be integrated into a single wafer structure, eliminating the need for stacking multiple wafers and thereby reducing bonding complexity while increasing the number of flow components.
Solution Approach 2:
The patent transitions from a linear or stacked arrangement of flow components to a two-dimensional concentric circular layout within the wafer plane. By utilizing radial and angular positioning instead of vertical stacking, the design accommodates multiple flow components without increasing the number of wafers, thus avoiding additional bonding steps.
2Device complexity
If flow components are positioned side by side in the main plane of the wafers, then the number of wafers can be reduced, but the lateral extension of the device increases
Solution Approach 1:
The patent applies nesting by arranging flow components in concentric circles where smaller components are positioned at the center and larger components encircle them. This nested configuration maximizes the utilization of the wafer area, allowing multiple flow components to be packed into a compact circular footprint rather than extending linearly or occupying excessive lateral space.
Solution Approach 2:
The patent employs curved concentric circular geometries for positioning flow components instead of straight-line or rectangular arrangements. This curved layout efficiently utilizes the available wafer area, creating a compact device with minimized lateral extension while accommodating multiple flow components in a space-efficient manner.
3Quantity of substance
If more than one specific functionality is integrated in each flow component, then the number of flow components can be reduced, but construction efforts increase considerably
Solution Approach 1:
The patent implements universality by designing each flow component with a standardized structure that can perform multiple functions depending on its position and configuration in the concentric arrangement. Rather than creating highly specialized multi-functional components requiring complex construction, the system uses modular components that achieve functional integration through their spatial arrangement and interconnections, thereby reducing construction efforts.
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 configuration allows for a more efficient use of wafer space, reducing manufacturing complexity and costs while maintaining the functionality of multiple flow components within a compact footprint.
Implementation Method 1
At least the first and second flow components comprise a respective deformable membrane
Data Source
AI summary
A fluid-control device comprises a stack of wafers in which flow components are provided as micro-electro-mechanical systems—MEMS. The flow components are selected from fluid-control components and/or fluid-monitor components. The fluid-control device has a first flow component that is encircled, in a main plane of the stack of wafers, by a second flow component.