Ink Jet Printing Head Fuse Element Current Control
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Solution Overview
Problem
Existing ink jet printing heads with fuse elements face challenges in reliable blowing and data storage due to ink infiltration and incomplete melting of fuse materials, which affects the reliability and productivity of the printing process.
Innovation Solution
Incorporating current adjusting means in the substrate to ensure the electric current continues to flow for a predetermined duration after reaching the maximum current, ensuring sufficient heating and scattering of the fuse element material, thereby enhancing the reliability of fuse element blowing and data storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electric current is applied to blow the fuse element, then the fuse element can be opened to store data, but the ink may infiltrate into the blown portion and corrode the electrodes
Solution Approach 1:
The patent applies a preliminary action by forming a resin layer over the fuse element before the fuse blowing process. This resin layer is prepared in advance to prevent ink infiltration when the fuse is blown, thereby preventing corrosion of electrodes and ensuring reliable data storage without compromising the integrity of surrounding components.
2Reliability
If the fuse element is blown by applying electric current, then data can be stored, but the blown material may adhere to the printed circuit board and affect productivity
Solution Approach 1:
The patent introduces an intermediary substance (resin layer) between the fuse element and the surrounding environment. This intermediary prevents the blown fuse material from adhering to the printed circuit board, thereby maintaining mass production efficiency while ensuring reliable data storage through complete fuse opening.
3Productivity
If the current is increased to blow the fuse element quickly, then the productivity is improved, but the fuse material may not scatter completely and the circuit may re-close
Solution Approach 1:
The patent extends the duration of current application beyond the traditional brief pulse. By maintaining continuous current flow for a predetermined period after the fuse element opens, the patent ensures complete vaporization and scattering of fuse material, preventing circuit re-closure and ensuring reliable data storage while maintaining production efficiency.
4Reliability
If the current flow duration is extended to ensure complete fuse blowing, then the data storage reliability is improved, but the energy consumption increases
Solution Approach 1:
The patent optimizes the electrical parameters by applying current at a predetermined amplitude and maintaining it for a predetermined period. This parameter optimization ensures complete fuse blowing and reliable data storage while minimizing energy consumption, achieving a balance between reliability and energy efficiency in the fuse blowing process.
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 ensures reliable blowing of the fuse elements and secure data storage by prolonging the heating time, preventing re-closure of the circuit and minimizing ink infiltration, thus improving the overall reliability and efficiency of the ink jet printing process.
Implementation Method 1
a fuse element which can be blown by passing an electric current therethrough
Implementation Method 2
The heating element in each nozzle is energized to form a bubble in the ink and an energy of the expanding bubble expels an ink droplet from the nozzle
Data Source
AI summary
A fuse element can be reliably blown and data that corresponds to whether or not the fuse element has been blown can be stored with high reliability. A resistor element is provided in a circuit through which an electric current flows to blow the fuse element in the ink jet printing head. The resistor element adjusts the electric current so that, in the process of blowing the fuse element, the current continues to flow for a predetermined duration even after a maximum current has passed through the fuse element. The predetermined duration is longer than a period from a time point when the electric current rises to a time point when the electric current reaches the maximum current.