Silicon Timepiece Component Coating for Wider Color Expression
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Solution Overview
Problem
Existing timepiece components made from silicon face limitations in color expression and decorativeness, particularly when using thickness variations of silicon layers to achieve different colors.
Innovation Solution
A timepiece component with a base material of silicon featuring a light reflecting layer composed of stacked silicon oxide and silicon layers, where the thicknesses of these layers vary across different regions to create distinct colors, allowing for a wide range of color expressions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the thickness of the silicon layer is varied to create different colors, then color expression is improved, but the range of realizable colors is limited
Solution Approach 1:
The light reflecting layer is segmented into multiple distinct layers (first silicon oxide layer, silicon layer, second silicon oxide layer) with different material compositions. By varying the thickness of each layer independently, the patent achieves broader color expression capabilities compared to using a single layer structure.
Solution Approach 2:
The patent employs a composite structure consisting of alternating silicon oxide and silicon layers. This composite material approach allows for complex optical interference effects that enable a wider range of colors to be realized compared to a homogeneous silicon layer structure.
2Adaptability or versatility
If a light reflecting layer with multiple stacked layers is formed on silicon base material, then decorativeness and color range are improved, but manufacturing complexity increases
Solution Approach 1:
The patent controls the thickness parameters of each layer (first silicon oxide layer, silicon layer, second silicon oxide layer) to optimize both color expression and manufacturing feasibility. By carefully selecting thickness ranges for each layer, the patent achieves diverse color effects while maintaining manufacturability.
3Weight of moving object
If silicon base material is used for timepiece components, then weight is reduced and machinability is improved, but decorativeness is insufficient
Solution Approach 1:
The patent applies a light reflecting layer with controlled thickness variations on the silicon base material to achieve diverse color effects. This allows the lightweight silicon component to gain enhanced decorativeness through optical interference effects produced by the multi-layer structure.
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 solution provides a timepiece component with enhanced decorativeness and a wide color range without compromising the component's strength, achieved through precise control of layer thicknesses in the light reflecting layer.
Implementation Method 1
a light reflecting layer formed on the base material and including a first silicon oxide layer, a silicon layer, and a second silicon oxide layer stacked in this order
Implementation Method 2
colors of the two regions are set to be different by differing a thickness of the silicon layer in the first region from a thickness of the silicon layer in the second region
Data Source
AI summary
A timepiece component includes a base material including silicon as a main component, and a light reflecting layer formed on the base material and including a first silicon oxide layer, a silicon layer, and a second silicon oxide layer stacked in this order, when the light reflecting layer is viewed in plan view, the light reflecting layer includes a first region and a second region, and at least one of the thicknesses of the first silicon oxide layer in the first region and the second region and the thicknesses of the second silicon oxide layer in the first region and the second region is set such that the thicknesses are different from each other.