Actuator Trace Segmentation for Adhesion and Current Distribution
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Solution Overview
Problem
In actuator devices, variations in contact resistance between terminals can lead to current concentration, resulting in heat evolution and potential disconnection due to adhesive agent penetration between terminals.
Innovation Solution
The actuator device includes a substrate with a contact and a trace, where the trace is laminated to the substrate with a portion overlapping the contact, featuring a plurality of terminals separated from each other and a base section coupled to them, allowing the adhesive agent to penetrate and improve adhesive strength while distributing current effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a plurality of terminals are provided in the adhesion region of contact and trace, then adhesive strength of actuator substrate and trace-substrate improves, but current concentrates in one terminal with small contact resistance causing heat evolution and potential disconnection
Solution Approach 1:
The trace is divided into multiple terminals (first terminal and second terminal) that are separated from each other in the adhesion region. This segmentation allows current to be distributed across multiple contact points rather than concentrating in a single terminal, thereby preventing heat evolution and disconnection while maintaining strong adhesion through the adhesive agent penetrating between the segmented terminals.
2Strength
If adhesive agent penetrates between terminals, then adhesive strength improves, but current concentration in one terminal causes heat evolution and disconnection
Solution Approach 1:
By segmenting the trace into multiple separated terminals, the invention creates multiple current pathways through the adhesive agent. This prevents current concentration and the resulting heat evolution, while the adhesive agent still effectively penetrates between the terminals to provide strong bonding between substrates.
Solution Approach 2:
The trace structure is designed with different local characteristics: terminals are separated in the adhesion region to distribute current and prevent heat, while the trace maintains continuity elsewhere to ensure electrical connection. This local differentiation resolves the contradiction between adhesion improvement and heat prevention.
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 configuration prevents terminal disconnection and enhances the adhesive strength between the actuator substrate and trace-substrate, ensuring reliable operation by distributing current and reducing heat concentration.
Implementation Method 1
an adhesive agent penetrates between the plurality of terminals, whereby adhesive strength of an actuator substrate and the trace-substrate improves
Implementation Method 2
A portion of the trace includes a plurality of terminals and a base section. The plurality of terminals are separated from each other. The base section is coupled to the plurality of terminals
Data Source
AI summary
An actuator device is provided. The actuator device includes: a first substrate including a contact; and a second substrate including a trace electrically connected to the contact. A portion of the second substrate is laminated to the first substrate in a first direction. The portion of the second substrate is adhered to the first substrate. A portion of the trace overlaps the contact in the first direction. A portion of the trace includes a plurality of terminals and a base section. The plurality of terminals are separated from each other. The base section is coupled to the plurality of terminals.