Flexible Electronic System Foil Activation Mechanism
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Solution Overview
Problem
Existing flexible electronic systems lack a reliable and user-friendly method for activating and attaching components, such as batteries and sensors, to a flexible substrate while preventing corrosion and environmental exposure.
Innovation Solution
A flexible electronic system with a non-conductive foil that is removably coupled to an adhesive surface, allowing for easy activation by peeling and separating to expose contact pads, integrated with a base support and various electronic components like sensors, processors, and batteries, using dielectric materials like fiberglass-filled epoxy and Parylene coatings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a removable separator is used to prevent ionic conduction between electrodes, then battery safety is improved, but device complexity increases due to additional components and assembly steps
Solution Approach 1:
The separator is integrated with the adhesive layer to form a single combined structure. This merging eliminates the need for separate separator and adhesive components, reducing assembly complexity while maintaining both battery safety (through separator functionality) and attachment capability (through adhesive functionality).
Solution Approach 2:
The combined separator-adhesive layer performs multiple functions simultaneously: it acts as a separator to prevent ionic conduction, provides adhesive bonding to attach the battery to the substrate, and serves as a structural support layer. This multi-functionality reduces the number of components needed while achieving multiple technical requirements.
2Ease of operation
If flexible electronic systems use traditional rigid activation methods, then manufacturing precision is maintained, but ease of operation deteriorates due to difficult activation processes
Solution Approach 1:
The adhesive layer is divided into multiple segments or zones with different properties. This segmentation allows different portions to serve different functions: some areas provide strong bonding, while others facilitate easy activation through tearing or peeling. The segmented design enables simple user operation while maintaining precise alignment through strategically placed adhesive zones.
Solution Approach 2:
The adhesive layer transitions from a static, permanently bonded state to a dynamic, controllable release state. The adhesive is designed to maintain strong bonding during normal use but can be easily released or repositioned during activation. This dynamic behavior allows precise initial alignment during manufacturing while enabling easy operational activation.
3Strength
If foil is permanently attached to adhesive surface, then attachment strength is improved, but recyclability deteriorates due to difficulty in separation
Solution Approach 1:
The adhesive layer is designed with periodic or cyclic bonding characteristics - strong bonding during normal operation periods, but capable of controlled release during recycling periods. This allows the foil to maintain strong attachment strength during use while enabling easy separation and recyclability when needed, through mechanisms such as temperature-dependent adhesion or controlled degradation.
Solution Approach 2:
The adhesive system is designed to allow for the discarding of the foil component while recovering and reusing the adhesive layer itself. The adhesive maintains its bonding properties and can be retained on the substrate for reuse, while the foil is easily removed and discarded. This selective discarding and recovering approach maintains attachment strength during use while enabling recyclability.
Data Source
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AI summary
A flexible electronic system includes a flexible electronic substrate having a first and second contact pads opposed to each other, one of the first and second contact pads is electrically coupled to a battery. A protective cover is disposed on the flexible electronic substrate. The flexible electronic system further includes a base support fixedly attached to the flexible electronic substrate, the base support having an adhesive surface opposed to the flexible electronic substrate, and a foil having a first portion removably coupled to at least a portion of the adhesive surface and a second portion, wherein the foil configures to permit a removal of the second portion disposed between the first and second contact pads and wherein the removal of the second portion activates the system.