Electrical Debonding Adhesive Sheet With Stable Voltage Contacts
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Solution Overview
Problem
Existing electrical debonding type adhesive sheets face issues with unstable voltage application due to protrudent parts that are not fixed with adhesive, leading to potential short circuits and increased operation steps, especially when using metal foils as substrates.
Innovation Solution
The adhesive sheet includes a substrate with an electroconductive layer and a base layer, featuring first and second protrudent parts that facilitate stable voltage application by ensuring consistent contact with adherends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal foil is used as the base layer for electrical conductivity, then voltage application is enabled, but burrs are generated during punching that cause short circuits
Solution Approach 1:
The patent replaces metal foil with a thin film substrate (PET, polyolefin, or paper) that is punched without generating burrs. The electrical conductivity is maintained through a vapor-deposited metal film layer (aluminum, silver, gold, copper, or nickel) applied to the thin film substrate, eliminating the burr problem while preserving electrical conductivity for voltage application.
2Object-generated harmful factors
If a vapor-deposited thin metal film is used as the substrate, then burr generation is eliminated, but the substrate becomes thin and flexible causing unstable electrical contact
Solution Approach 1:
The patent divides the substrate into two functional parts: a thin film substrate (PET, polyolefin, or paper) that provides mechanical stability and prevents burr generation, and a vapor-deposited metal film layer (aluminum, silver, gold, copper, or nickel) that provides electrical conductivity. This segmentation allows each layer to optimize its specific function while working together to achieve both burr elimination and stable electrical contact.
3Productivity
If the substrate for voltage application is exposed to improve voltage application efficiency, then electrical contact is enhanced, but the protrudent part is not fixed with adhesive causing instability
Solution Approach 1:
The patent applies adhesive only to specific regions of the substrate where it is needed for stability, while leaving other regions exposed for voltage application. The adhesive is applied to the substrate in a pattern that provides fixation where required while maintaining electrical contact areas free of adhesive, thus achieving both stability and voltage application efficiency simultaneously.
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 configuration allows for stable electrical debonding of joined bodies by minimizing unstable contacts and reducing the number of operation steps, ensuring reliable voltage application.
Implementation Method 1
a substrate for voltage application, which includes an electroconductive layer and a base layer
Implementation Method 2
an electrical debonding type adhesive layer constituted of an electrically debondable adhesive composition and which undergoes debonding upon voltage application to the adhesive layer
Data Source
AI summary
The present invention provides an electrical debonding type adhesive sheet capable of producing a joined body in which a voltage can be stably applied to an electrical debonding type adhesive layer. An electrical debonding type adhesive sheet according to a first embodiment of the present invention includes a first adhesive layer, a substrate for voltage application including an electroconductive layer and a base layer, and a second adhesive layer in this order, and has a first protrudent part, in which the first adhesive layer and the substrate for voltage application extend and protrude with respect to the second adhesive layer, and a second protrudent part, in which the substrate for voltage application extends from the first protrudent part and protrudes with respect to the first adhesive layer.