Liquid Jet Head Through-Hole Electrode Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid jet head configurations require multiple components and complex connections for high-density recording, and are prone to short circuits when using conductive inks, limiting their versatility and convenience.
Innovation Solution
A method of manufacturing a liquid jet head involving through hole formation, actuator portion disposition, and plating to create electrodes that allow electrical continuity through a single external wiring connection, with roughened inner surfaces for improved plating efficiency and reduced component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple head chips are bonded to achieve high-density recording, then recording density is improved, but the number of components and configuration complexity increases
Solution Approach 1:
The patent combines multiple actuator portions (first and second actuator portions) onto a single base plate to form one integrated head chip. This merging approach achieves high-density recording capability while reducing the number of separate components and simplifying the overall configuration, directly resolving the contradiction between recording density and configuration complexity
2Adaptability or versatility
If conductive ink is used in multi-head chip configuration, then ink versatility is improved, but short circuit occurs between drive electrodes
Solution Approach 1:
The patent segments the drive electrodes into first and second drive electrodes that are spatially separated and isolated from each other by the partition walls. This segmentation prevents electrical short circuits between electrodes while allowing the use of conductive inks, thus resolving the contradiction between ink versatility and electrical stability
3Reliability
If separate flexible printed boards are connected to each head chip, then electrical connection is ensured, but component count and manufacturing complexity increase
Solution Approach 1:
The patent merges the electrical connection structure by routing both first and second electrodes through through-holes in the base plate to connect to a single flexible printed board. This approach ensures reliable electrical connections for all actuator portions while reducing the number of separate connections needed, thereby improving ease of manufacture
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
Enables high-density recording with reduced components and simplified configuration, while preventing short circuits and accommodating various ink types, including conductive inks.
Implementation Method 1
when voltage is applied to the drive electrodes through the flexible printed board and the extraction electrodes, the partition walls are deformed. The deformation of the partition walls increases the pressure inside the channels, and ink housed inside the channels are thereby ejected through nozzle holes.
Implementation Method 2
a plating step of performing plating on the base plate, the first actuator portion, and the second actuator portion to form first electrodes configured to drive the first actuator portion and second electrodes configured to drive the second actuator portion
Data Source
AI summary
A method of manufacturing a liquid jet head includes a through hole forming step of forming through holes on a base plate, an actuator plate bonding step of bonding actuator plates to opposite sides of the base plate, and an electrode forming step of forming electrodes on the bonded base plate and the actuator plates. In the through hole forming step, the through holes are formed on the base plate and the inner surfaces of the through holes are roughened. In the electrode forming step, second extraction electrodes are routed to a principal surface of the base plate through the through holes.