Liquid Discharge Head Substrate Adhesion via Concave Portion Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for manufacturing liquid discharge heads face issues with unsatisfactory adhesion between substrates due to contamination, leading to gaps and liquid leakage, which can result in color mixing and other defects.
Innovation Solution
A method involving a first substrate with a discharge port and a concave portion on its second surface, where the first liquid flow passage is opened inside the concave portion, and a second substrate with a second liquid flow passage, bonded using an adhesive agent that communicates the passages, enhancing adhesion and preventing liquid leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second surface of the first substrate is stuck to the third surface of the second substrate using an adhesive agent, then the substrates are bonded together to form the liquid discharge head, but the deposit on the second surface causes unsatisfactory adhesion and liquid leakage
Solution Approach 1:
The patent applies preliminary cleaning action by introducing a cleaning apparatus that removes deposits from the second surface of the first substrate before the bonding process. This preliminary cleaning ensures that the bonding surface is free from contamination, allowing the adhesive agent to achieve satisfactory adhesion between the first and second substrates, thereby preventing liquid leakage while maintaining reliable substrate bonding
2Reliability
If the second surface is cleaned to remove deposit, then adhesion is improved, but additional manufacturing steps are required
Solution Approach 1:
The patent introduces a cleaning apparatus as an intermediary component in the manufacturing system. This cleaning apparatus acts as a mediator between the substrate preparation and bonding processes, automatically removing deposits from the second surface. By incorporating this intermediary cleaning step into the manufacturing line, the system achieves reliable adhesion without significantly increasing overall process complexity, as the cleaning function is integrated into the existing manufacturing workflow
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 satisfactory bonding of substrates, preventing liquid leakage and enhancing adhesion, thus maintaining the integrity and functionality of the liquid discharge head.
Implementation Method 1
sticking the first substrate and the second substrate to communicate the first liquid flow passage with the second liquid flow passage by bonding a bottom face of the concave portion and the third surface with an adhesive agent
Data Source
AI summary
A method of manufacturing a liquid discharge head includes preparing a first substrate where a discharge port configured to discharge liquid is formed to face a first surface, a concave portion is formed on a side of a second surface opposite to the first surface, and a first liquid flow passage penetrating from the first surface to the second surface is opened inside the concave portion on the side of the second surface, preparing a second substrate including a second liquid flow passage opened on a third surface, and sticking the first substrate and the second substrate to communicate the first liquid flow passage with the second liquid flow passage by bonding a bottom face of the concave portion and the third surface with an adhesive agent.