Glass Substrate Marking Fracture Prevention
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Solution Overview
Problem
Glass substrates are brittle and prone to fractures when marks are engraved on them, leading to shallow mark processing that reduces visibility and readability.
Innovation Solution
A glass substrate with marks composed of plural dots, each with a depth of 0.5 μm to 7.0 μm and an inclination angle of 5° to 56°, designed to minimize fracture risk while maintaining mark visibility through optimized laser processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If marks are engraved deeply on glass substrate surfaces, then mark visibility and readability are improved, but fracture probability increases
Solution Approach 1:
The patent applies parameter changes by optimizing the depth and inclination angle parameters of the engraved dots. The depth is controlled within 0.5-7.0 μm and inclination angle within 5°-56°, transforming the marking process from a binary deep/shallow choice to a controlled parameter optimization that simultaneously achieves visibility and fracture prevention
Solution Approach 2:
The patent applies local quality by creating dots with specific local geometric characteristics (inclination angles and depth ranges) rather than uniform shallow or deep markings. Each dot has a controlled local structure that balances light reflection for visibility with stress distribution for fracture prevention
2Reliability
If marks are processed shallowly to reduce fracture risk, then structural integrity is improved, but mark readability deteriorates
Solution Approach 1:
The patent uses parameter changes to define specific depth (0.5-7.0 μm) and inclination angle (5°-56°) ranges that optimize the balance between structural integrity and readability. This transforms the shallow marking approach into a controlled parameter regime that maintains both strength and information quality
Solution Approach 2:
The patent applies dimensionality change by introducing the inclination angle dimension alongside depth. Instead of only controlling depth (one dimension), the solution uses both depth and inclination angle (two dimensions) to create an optimized marking geometry that achieves readability without sacrificing structural integrity
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 effectively suppresses fractures and maintains the visibility of marks on glass substrates, ensuring both structural integrity and readability.
Implementation Method 1
a mark may be formed on a surface of such a glass substrate by engraving through irradiation of the surface with laser light
Data Source
AI summary
A glass substrate 10 has a mark provided on a surface 10A of the glass substrate 10, the mark including plural dots 104, a depth H of each of the dots 104 is 0.5 μm or larger and 7.0 μm or smaller, and an inclination angle of a side surface 104B of each of the dots 104 is 5° or larger and 56° or smaller.