Fluid Nozzle Array With Stopping Layer for High Density Printing
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Solution Overview
Problem
The density and firing rate of ink nozzles in inkjet printers are limited by the structural constraints of the wafer and thermal efficiency of ink chambers, restricting the quality and speed of printing.
Innovation Solution
A semiconductor substrate with a membrane layer, stopping layer, and handle layer is used to form a two-dimensional array of ink chambers, allowing for higher nozzle density and thermal efficiency by controlling the etching process and minimizing fluid paths for faster refill.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a higher density array of ink nozzles is used, then image quality is improved, but structural constraints of the wafer limit the achievable density
Solution Approach 1:
The patent transitions from traditional planar ink chamber arrangements to a three-dimensional structure by forming ink chambers above a semiconductor substrate with a handle layer. This vertical stacking approach allows multiple ink chambers to be positioned at different heights and locations, significantly increasing nozzle density without proportionally increasing wafer footprint area.
2Productivity
If ink nozzles are fired at higher rates, then printing speed is improved, but thermal efficiency of ink chambers becomes the limiting factor
Solution Approach 1:
The patent introduces a fluid distribution layer as an intermediary component between the ink supply and individual ink chambers. This layer efficiently distributes ink to multiple chambers simultaneously, enabling faster refill rates that keep pace with high-frequency nozzle firing. The fluid distribution layer acts as a buffer and transport medium, decoupling the thermal constraints of individual chambers from the overall system firing rate.
3Productivity
If the number of ink nozzles is increased, then print speed is improved, but the refill rate of ink chambers becomes the limiting factor
Solution Approach 1:
The patent segments the ink supply system into a central ink supply reservoir, a fluid distribution layer with multiple distribution channels, and individual ink chambers. This segmentation allows parallel ink delivery to multiple chambers simultaneously, rather than sequential refilling. The fluid distribution layer contains multiple independent channels that can refill different chambers at the same time, dramatically reducing the overall refill time for high-density nozzle arrays.
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 enables a higher density of ink nozzles and faster firing rates, enhancing the quality and speed of printing while providing a more durable and thermally efficient ink nozzle array.
Implementation Method 1
The thermal resistor heats ink within a small chamber associated with each nozzle
Implementation Method 2
This causes the ink within the chamber to expand, causing an ink droplet to be propelled from the ink nozzle opening
Data Source
AI summary
A method for fabricating a fluid nozzle array includes forming a circuitry layer onto a substrate, the substrate comprising a stopping layer disposed between a membrane layer and a handle layer, forming a fluid feedhole extending from a surface of the membrane layer to the stopping layer, and forming a fluid supply trench extending from a surface of the handle layer to the stopping layer. A fluid nozzle array includes a substrate including a membrane layer, a stopping layer adjacent to the membrane layer, a handle layer adjacent to the stopping layer, and a set of fluid chambers disposed on a surface of the membrane layer above and along a width of a fluid supply trench extending from a surface of the handle layer to the stopping layer.