Ink-jet Recording Head Etched End Surface Positioning
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Solution Overview
Problem
Existing methods for manufacturing ink-jet recording heads struggle to maintain accuracy when densely arranging discharge ports, as variations in cutting substrate accuracy increase with higher port densities, making it difficult to achieve the required precision for higher recording speeds and image quality.
Innovation Solution
The method involves forming recording element substrates with an etched second surface that serves as a corrosion-resistant end surface, allowing for precise positioning and bonding of substrates, ensuring accurate placement of discharge ports by using this surface for contact and fixation, rather than relying solely on the first surface with discharge ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of discharge ports is increased to meet higher recording speed and image quality demands, then the recording performance is improved, but the variations in cutting accuracy of recording element substrates become more significant, making it difficult to maintain positioning precision
Solution Approach 1:
The patent transitions from positioning substrates using only the first surface (where discharge ports are located) to using the second surface (end surface) for positioning. This dimensional change allows the substrates to be positioned and bonded with higher precision at the end surfaces, which then ensures accurate discharge port arrangement when substrates are brought into contact at the first surfaces.
Solution Approach 2:
The patent applies etching to the second surface of the recording element substrates before assembly. This preliminary action creates a corrosion-resistant, precisely defined surface that serves as an accurate positioning reference during subsequent bonding operations, preventing positioning errors before they occur.
2Measurement precision
If the density of discharge ports is increased from 300 dpi to 600 dpi, then the image quality is improved, but the intervals between discharge ports are reduced, making it more difficult to reduce variations in cutting accuracy
Solution Approach 1:
The patent uses the second surface (end surface) of the substrates for positioning and bonding operations. This approach decouples the positioning accuracy from the discharge port density, allowing high-density port arrangements (600 dpi) to be achieved while maintaining positioning precision through the etched end surfaces.
Solution Approach 2:
The etched second surface acts as an intermediary positioning reference that mediates between the cutting variations and the final discharge port arrangement. By using this intermediate reference surface for bonding, the patent eliminates the direct transmission of cutting errors to the discharge port positions.
3Ease of manufacture
If recording element substrates are aligned by being brought into contact with each other at end surfaces, then the manufacturing process is simplified, but the accuracy of discharge port arrangement directly corresponds to variations in cutting accuracy
Solution Approach 1:
The patent applies etching to the second surface before assembly to create a corrosion-resistant, precisely defined positioning reference. This preliminary action ensures that when substrates are brought into contact at the end surfaces for alignment, the positioning accuracy is not affected by cutting variations or corrosion during the bonding 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 the accuracy of discharge port placement and reduces variations in substrate positioning, enabling the production of ink-jet recording heads with higher port densities while simplifying the manufacturing process and extending the life of cutting devices.
Implementation Method 1
a second surface, serving as an end surface intersecting with the first surface, being at least partially formed by etching
Data Source
AI summary
An ink-jet recording head includes a plurality of recording element substrates each having an ejection pressure generating element configured to generate pressure for ejecting ink from an ink discharge port. The plurality of recording element substrates each include a first surface on which the corresponding ejection pressure generating element is disposed and a second surface, serving as an end surface intersecting with the first surface, being at least partially formed by etching.