TSV-Integrated Microfluidic Actuator Chip for High Flow Miniaturization
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Solution Overview
Problem
Current micro fluid actuators face challenges in integrating the main body and control elements, such as microcontrollers and control circuits, which limits their miniaturization and efficiency in fluid transportation applications.
Innovation Solution
A heterogeneous integration chip for micro fluid actuators is developed using through-silicon-via (TSV) packaging technology, combining a MOS circuit IC or microcontroller with a piezoelectric layer and conductive layers on substrates, along with perforated trenches and conductors to facilitate fluid flow and control, enabling effective integration and fluid transportation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If micro fluid actuators are miniaturized, then the structure size is reduced, but the flow rate decreases
Solution Approach 1:
The patent employs three-dimensional vertical stacking architecture where multiple functional layers (piezoelectric actuator layer, control element layer, fluid channel layer) are stacked vertically. This dimensional transition allows the device to maintain compact footprint while increasing flow capacity through vertical fluid pathways and multi-layer parallel processing, effectively decoupling size reduction from flow rate maintenance.
Solution Approach 2:
The patent implements nested integration where control elements (ICs, microcontrollers) are embedded within or coupled to the substrate structure, and fluid channels are integrated within the same substrate layers. This nesting allows multiple functional components to occupy overlapping spatial volumes, enabling miniaturization without sacrificing flow transportation capability.
2Adaptability or versatility
If control elements are integrated into micro fluid actuators, then device functionality is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent divides the integrated device into distinct functional modules: piezoelectric actuator modules, control element modules, and fluid channel modules. Each module can be manufactured separately using optimized processes for that specific function, then assembled through standardized interfaces. This segmentation reduces overall manufacturing complexity while maintaining enhanced functionality.
Solution Approach 2:
The patent introduces intermediary coupling structures and standardized interface layers between the piezoelectric actuator layer and control element layer. These intermediaries provide mechanical support, electrical connection, and fluid sealing, allowing different manufacturing processes to be combined without direct integration complexity. The bonding layer and conductor structures serve as intermediaries that simplify the integration of heterogeneous components.
3Productivity
If heterogeneous materials are integrated, then functional performance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies different material properties and structural characteristics to specific local regions: piezoelectric materials are used only where actuation is needed, conductive materials are localized to electrode regions, and fluid channel structures are positioned precisely where flow is required. This local quality approach allows each region to be optimized for its specific function while reducing the overall precision burden through functional zoning.
Solution Approach 2:
The patent incorporates preliminary alignment features, pre-formed bonding patterns, and pre-positioned conductor traces during the manufacturing of individual layers before final assembly. These preliminary actions ensure that when heterogeneous materials are integrated, the precision requirements are already partially satisfied through built-in alignment and positioning mechanisms, reducing the burden on final integration steps.
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 solution allows for enhanced miniaturization and increased flow rates in micro fluid actuators, addressing the integration bottleneck and improving their performance in diverse industrial and biomedical applications.
Implementation Method 1
a piezoelectric layer (1d) is disposed on the first conductive layer (1c)
Data Source
AI summary
A heterogeneous integration chip of a micro fluid actuator is disclosed and includes a first substrate, a first insulation layer, a first conductive layer, a piezoelectric layer, a second conductive layer, a second substrate, a control element, a perforated trench and a conductor. The first substrate includes a first chamber. The first insulation layer is disposed on the first substrate. The first conductive layer is disposed on the first insulation layer and includes an electrode pad. The piezoelectric layer and the second conductive layer are stacked on the first conductive layer sequentially. The second substrate is assembled to the first substrate through a bonding layer to define a second chamber and includes an orifice, a fluid flowing channel and a third chamber. The control element is disposed in the second substrate. The perforated trench filled with the conductor is penetrated from the electrode pad to the second substrate.