Interspersed Fluidic and Circuit Elements in a Fluidic Die
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Solution Overview
Problem
Existing fluid dispensing systems face challenges in efficiently integrating fluidic actuators and circuit elements within a compact fluidic die, leading to insufficient space for circuit elements in sparse arrangements of fluidic elements, which affects the overall performance and density of the system.
Innovation Solution
The solution involves an interspersed arrangement of fluidic cells and circuit elements across multiple axes on a common substrate, where fluidic cells are interspersed with circuit elements, allowing for a sparse arrangement of fluidic elements while providing sufficient space for circuit elements, and forming layers of fluidic cells and circuit elements as part of an integrated circuit processing flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fluidic elements are arranged sparsely on the substrate, then each fluidic element has sufficient space for operation, but the overall density of the fluidic die decreases and circuit element space is insufficient
Solution Approach 1:
The patent applies dimensionality change by transitioning from a planar arrangement to a three-dimensional stacked architecture. Circuit elements are positioned in vertical layers above the substrate plane, interspersed among fluidic elements. This vertical dimensionality allows circuit elements to occupy space without interfering with the horizontal operation space of fluidic elements, thereby increasing circuit element density while maintaining fluidic element operational clearance.
Solution Approach 2:
The patent implements nesting by placing circuit elements within the vertical space occupied by fluidic element structures. Specifically, circuit elements are embedded in regions between fluidic element components vertically, allowing circuit elements to be nested within the overall footprint of the fluidic die without reducing the operational space of fluidic elements on the substrate plane.
2Area of stationary object
If circuit elements are densely packed to increase density, then the fluidic die size can be reduced, but parasitic impedances in signal transmission increase
Solution Approach 1:
The patent reduces parasitic impedance by utilizing the vertical dimension for circuit element placement. Circuit elements are positioned at different vertical levels rather than being densely packed in a single plane. This spatial separation in the vertical dimension reduces electromagnetic interference and parasitic coupling between adjacent circuit elements, allowing for compact die area without significant increase in parasitic impedance.
Solution Approach 2:
The patent applies local quality by optimizing the spatial distribution of circuit elements based on their functional requirements. Circuit elements are strategically positioned in specific vertical regions and lateral positions to minimize signal path lengths and parasitic effects for critical signals, while maintaining overall high density. Different regions of the die have different circuit element densities optimized for their specific functional requirements.
3Quantity of substance
If circuit elements are interspersed among fluidic elements, then circuit element density increases and die area is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the fluidic die into distinct functional layers and regions. Circuit elements are segmented into different vertical levels and lateral zones, with each segment optimized for specific functions. This segmentation allows for systematic manufacturing processes where each layer can be fabricated and assembled in a controlled manner, reducing overall manufacturing complexity despite the integrated structure.
Solution Approach 2:
The patent implements universality by designing a modular interspersed architecture where circuit elements and fluidic elements can be standardized and reused across different die configurations. The vertical stacking approach creates universal building blocks that can be replicated and assembled through standardized manufacturing processes, reducing the complexity increase that would result from custom integrated structures.
Data Source
AI summary
In some examples, a fluidic die includes an arrangement of fluidic elements to dispense a fluid, where each fluidic element of the fluidic elements includes a fluidic actuator and a fluid chamber. The fluidic die includes an array of fluid feed holes in a plurality of dimensions to communicate the fluid with the fluidic elements, where each of multiple fluid feed holes along a first dimension of the plurality of dimensions is distinct from multiple fluid feed holes along a second dimension of the plurality of dimensions. The fluidic die includes circuit elements interspersed in regions between the fluidic elements along different axes of the fluidic die, where each circuit element of the circuit elements includes an active device. The fluidic elements and the circuit elements are formed on a common substrate.