Stretchable Device Rigid Parts Suppress Body Deformation
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Solution Overview
Problem
Stretchable devices face damage to functional elements when subjected to loads due to undesirable deformation of the body, which can harm switch elements.
Innovation Solution
A stretchable device design featuring a resin base member with meandering hinges and resin layers of lower elastic modulus, where first rigid parts with higher elastic modulus are integrated to overlap the bodies, reducing deformation and protecting functional elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the body deforms under load to allow device stretching, then the device achieves elasticity and flexibility, but the functional elements disposed at the bodies are damaged
Solution Approach 1:
The device is segmented into distinct functional zones: hinges that deform to provide elasticity, and bodies that remain rigid to protect functional elements. The resin base member is divided into multiple bodies separated by hinges, allowing selective deformation in hinge regions while maintaining structural integrity in body regions.
Solution Approach 2:
Different parts of the device have different mechanical properties: hinges are designed to be flexible and deformable, while bodies are designed to be rigid and resistant to deformation. This local differentiation of material properties allows the device to stretch through hinge deformation without compromising the functional elements at the bodies.
2Reliability
If rigid parts are added to suppress body deformation, then functional elements are protected from damage, but the device complexity increases
Solution Approach 1:
The device uses a composite structure combining resin base member with embedded rigid parts. The rigid parts are integrated into the resin layers, creating a composite material system that provides both protection for functional elements and maintains the overall flexibility of the device through the resin matrix.
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 integration of higher elastic modulus rigid parts effectively suppresses deformation of the bodies, thereby minimizing damage to functional elements like transistors, while maintaining the elasticity and flexibility of the device.
Implementation Method 1
the resin layers are made of resin having lower elastic modulus than that of the resin base member
Implementation Method 2
The resin layers are provided with first rigid parts having higher elastic modulus than that of the resin that forms the resin layers
Data Source
AI summary
According to an aspect, a stretchable device includes: a resin base member; an array layer provided to the resin base member; and a pair of resin layers that sandwich the resin base member and the array layer from both sides in a thickness direction in which the resin base member and the array layer are disposed, the resin layers being made of resin having lower elastic modulus than that of the resin base member. The resin base member includes: bodies separated from each other in a direction orthogonal to the thickness direction; and hinges coupling the bodies while meandering. The array layer includes functional elements overlapping the bodies when viewed in the thickness direction. The resin layers are provided with first rigid parts having higher elastic modulus than that of the resin that forms the resin layers. The first rigid parts overlap the bodies when viewed in the thickness direction.