Electrically Peelable Adhesive Sheet with Extension-Free Substrate
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Solution Overview
Problem
Existing electrically peelable pressure-sensitive adhesive sheets used in applications for temporarily fixing electronic components have substrate extensions that can cause malfunctions and troubles in electronic equipment due to contact with other members.
Innovation Solution
An electrically peelable pressure-sensitive adhesive sheet with an electrically conductive substrate having no extension portions beyond the adhesive layers, and an intermediate layer including an electrically conductive pressure-sensitive adhesive layer, allowing for easy tack reduction by voltage application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the substrate has extension portions elongating beyond the adhesive layers, then electrical conductivity can be ensured, but the extension portions may contact other members causing malfunctions in electronic equipment
Solution Approach 1:
The substrate is divided into a main body portion and separate extension portions. The extension portions are segmented structures that provide electrical conductivity where needed while being isolated from contact with other members, preventing malfunctions in electronic equipment.
Solution Approach 2:
An intermediate layer is introduced between the extension portions and the adhesive layer. This intermediate layer acts as a mediator that maintains electrical conductivity through the extension portions while preventing direct contact between the extensions and other members, thus avoiding harmful interference.
2Ease of operation
If voltage is applied to reduce tack of the adhesive layer, then repeelability is improved, but the structure becomes more complex requiring additional conductive components
Solution Approach 1:
The extension portions serve multiple functions: they provide electrical conductivity for voltage application to enable repeelability, while also serving as structural support and electrical pathways. This multi-functionality reduces the need for separate components, thereby limiting the increase in structural complexity.
Solution Approach 2:
The conductive function and structural support function are merged into the extension portions of the substrate. By combining these functions into a single integrated structure, the overall device complexity is minimized while still enabling voltage application for tack reduction and improved repeelability.
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
The adhesive sheet can be used in applications with limited attachment space, such as electronic components, building members, and vehicles, ensuring stable conductivity and preventing malfunctions by minimizing substrate extensions.
Implementation Method 1
an electrically conductive substrate having a support, an intermediate layer, and an electrically conductive layer in this order, at least part of the intermediate layer includes an electrically conductive pressure-sensitive adhesive layer
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3(a)~3(b)
AI summary
Provided is an electrically peelable pressure-sensitive adhesive sheet including an electrically conductive substrate having a support, an intermediate layer, and an electrically conductive layer in this order, a first pressure-sensitive adhesive layer having electrical peelability laminated on a side of the electrically conductive layer of the electrically conductive substrate, and a second pressure-sensitive adhesive layer laminated on a side of the support, wherein the electrically conductive substrate has substantially no extension portion elongating and exposed more than the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer in a surface extending direction of the electrically conductive substrate, and at least part of the intermediate layer includes an electrically conductive pressure-sensitive adhesive layer.