Exterior Housing Structure with Atomic-Diffusion Decorative Bonding
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Solution Overview
Problem
Existing exterior housings of electronic devices, such as smartphones and wearable devices, face challenges in securing both high bonding strength and design characteristics due to the use of materials bonded by gaskets or adhesives, which are prone to stress concentration and limited in decorative options.
Innovation Solution
A structure comprising substrates bonded by atomic diffusion bonding with a bonding layer that also serves as a decorative layer, utilizing metal and dielectric multilayer films to enhance both bonding strength and aesthetic appeal, allowing for adjustable color development and angle-dependent decoration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If gaskets or adhesives are used to bond members in exterior housing, then assembly is simplified and design flexibility is improved, but bonding strength is reduced and stress concentration occurs
Solution Approach 1:
The patent merges the bonding function and decorative function into a single integrated layer. The decorative layer is positioned between the first and second substrates, serving simultaneously as an aesthetic element and as a bonding interface, eliminating the need for separate gaskets or adhesives while maintaining structural integrity
Solution Approach 2:
The decorative layer is constructed as a composite structure with a reflective layer and a base layer. This composite material configuration provides both mechanical bonding strength to prevent stress concentration and aesthetic decorative properties, resolving the contradiction between strength and design flexibility
2Strength
If thick materials are bonded by atomic diffusion bonding, then bonding strength is improved, but manufacturing complexity increases and design flexibility is reduced
Solution Approach 1:
The bonding structure is segmented into distinct functional layers: a reflective layer and a base layer. This segmentation allows each layer to be optimized independently for its specific function while simplifying the overall manufacturing process through modular construction
Solution Approach 2:
The decorative layer is designed to perform multiple functions simultaneously: it provides aesthetic decoration, enables atomic diffusion bonding between substrates, and manages stress distribution. This multi-functionality reduces manufacturing complexity by eliminating the need for separate components
3Shape
If decorative layers are added to bonded structures, then design characteristics are improved, but structural integrity may be compromised
Solution Approach 1:
The patent combines the decorative function and structural bonding function into a single integrated decorative layer. This layer includes a reflective layer for aesthetic purposes and a base layer for bonding, allowing both design characteristics and structural integrity to be achieved simultaneously without compromising either function
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 structure achieves improved bonding strength and design flexibility by dispersing impact stress and enabling varied color effects, enhancing the overall structural integrity and visual appeal of electronic device housings.
Implementation Method 1
an exterior housing of the smartphone, the wristwatch, the watch-type wearable device, or the like has, for example, a windshield (a glass windshield), a frame, and a back surface plate. Those members included in the exterior housing are fixed by a gasket made of a plastic or bonded by an adhesive including an organic material.
Data Source
AI summary
A structure according to an embodiment of the present disclosure includes: a first substrate; a second substrate opposed to the first substrate; a bonding layer provided between the first substrate and the second substrate; and a first decorative layer provided between the first substrate and the second substrate.