Fuse Chamber Encapsulation for Inkjet Printhead Data Integrity
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Solution Overview
Problem
In inkjet printing systems, the blowing of fuses to store information can damage components, and exposure to fluidic or non-fluidic materials can alter the stored data or prevent proper blowing, due to undesired thermal or electrical environments affecting the fuses.
Innovation Solution
A chamber is formed adjacent to each fuse with a single orifice for access, encapsulated by a material that provides a conducive thermal and electrical environment and prevents fluidic and non-fluidic materials from entering, using an encapsulation layer to hermetically seal the chamber and prevent contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fuses are exposed to fluidic or non-fluidic materials during blowing, then the thermal or electrical environment is affected, but the fuse may become un-blown and change stored information
Solution Approach 1:
The patent divides the printhead into separate encapsulated chambers, each containing individual fuses. This segmentation isolates the fuses from external fluidic and non-fluidic materials, preventing contamination and ensuring reliable information storage while allowing the blowing process to proceed without environmental interference.
Solution Approach 2:
The patent introduces an encapsulation layer as an intermediary barrier between the fuses and the external environment. This encapsulation prevents direct contact between fluidic/non-fluidic materials and the fuse components, eliminating the harmful thermal and electrical environmental effects while maintaining the integrity of stored information.
2Reliability
If materials are disposed in close proximity to the fuse, then the thermal or electrical environment is affected, but the fuse blowing process is compromised
Solution Approach 1:
The patent segments the printhead structure into distinct encapsulated chambers, physically separating the fuses from other materials that would otherwise be disposed in close proximity. This segmentation creates isolated environments where fuse blowing can occur without thermal or electrical interference from adjacent materials.
Solution Approach 2:
The patent extracts the fuses into separate encapsulated chambers, removing them from the general material environment. This extraction eliminates the harmful thermal and electrical environmental effects caused by nearby materials, ensuring proper fuse blowing while maintaining device functionality.
3Ease of operation
If a chamber is formed with a single orifice, then access to the chamber is provided, but material removal to define the chamber is required
Solution Approach 1:
The patent forms the chamber structure with the single orifice defined in advance during the manufacturing process. By preliminarily defining the orifice location and size before final encapsulation, the design simplifies the overall manufacturing process while ensuring proper access to the chamber for its intended function.
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 ensures that fuses can be properly blown and maintain their stored information without damage from external materials, ensuring reliable operation of the inkjet printhead.
Implementation Method 1
an encapsulation layer encloses the chamber by covering the orifice with an encapsulation material
Implementation Method 2
The chamber provides a desired thermal and electrical environment for the component
Implementation Method 3
The chamber provides a desired thermal and electrical environment for the component
Data Source
AI summary
Embodiments of a system with first means for forming a chamber adjacent to a component formed on a substrate and a single orifice between the chamber and a first surface of the first means that is opposite a second surface of the first means adjacent to the substrate and second means for enclosing the chamber on at least a portion of the first surface that encompasses the single orifice are disclosed.