Fluidic Die Conductive Line Layout for Uniform Actuator Energy
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Solution Overview
Problem
In fluid dispensing systems, particularly in dense arrangements of fluidic actuators, parasitic resistance variations along columns and rows cause uneven dispensing of fluid, leading to image quality degradation in 2D printing and structural defects in 3D printing due to inconsistent electrical energy delivery to fluidic actuators.
Innovation Solution
Electrically conductive lines connecting switches to fluidic actuators are designed with tailored cross-sectional dimensions to match parasitic resistances, reducing variations and ensuring uniform electrical energy delivery by compensating for distance-related resistance differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electrically conductive lines have uniform cross-sectional dimensions, then manufacturing is simplified, but parasitic resistance variations cause uneven fluid dispensing and printing quality degradation
Solution Approach 1:
The patent applies local quality by varying the cross-sectional dimensions of electrically conductive lines differently at different locations. Specifically, lines in rows or columns with higher parasitic resistance (typically longer lines) are designed with larger cross-sectional dimensions to compensate for resistance variations, while lines with lower resistance maintain smaller dimensions. This localized differentiation ensures uniform electrical energy delivery to all fluidic actuators, eliminating printing defects while maintaining manufacturability through standard fabrication processes.
2Area of stationary object
If electrically conductive lines are made longer to reach distant fluidic actuators, then coverage area increases, but parasitic resistance increases causing uneven energy delivery
Solution Approach 1:
The patent applies parameter changes by modifying the cross-sectional dimension parameter of electrically conductive lines based on their length and resulting parasitic resistance. Lines extending to distant fluidic actuators (longer lines) are designed with larger cross-sectional dimensions, which reduces their parasitic resistance. This parameter adjustment ensures that all lines, regardless of length, deliver consistent electrical energy to their respective fluidic actuators, maintaining reliable operation across the entire array while achieving maximum coverage area.
3Power
If higher voltage is applied to compensate for parasitic resistance, then energy delivery to distant actuators improves, but heat generation increases causing defects
Solution Approach 1:
The patent applies preliminary action by pre-designing the cross-sectional dimensions of electrically conductive lines to compensate for parasitic resistance before the system operates. By incorporating larger cross-sectional dimensions in lines that would otherwise have high resistance, the design proactively eliminates the need for excessive voltage compensation during operation. This preliminary structural adjustment ensures uniform power delivery across all actuators while minimizing heat generation, preventing thermal defects before they occur.
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 approach reduces defects in printing quality and structural integrity by ensuring consistent fluid dispensing, minimizing energy consumption and heat generation in the fluidic die.
Implementation Method 1
parasitic resistance variations along columns and rows cause uneven dispensing of fluid
Implementation Method 2
Electrically conductive lines connecting switches to fluidic actuators are designed with tailored cross-sectional dimensions to match parasitic resistances
Data Source
AI summary
In some examples, a fluidic die includes fluidic actuators, switches, and electrically conductive lines in an electrically conductive layer of the fluidic die. The electrically conductive lines electrically connect the switches to respective actuators. A first dimension of a first electrically conductive line is different from a second dimension of a second electrically conductive line to match a first resistance of the first electrically conductive line having a first length to a second resistance of the second electrically conductive line having a second length different from the first length.