Laser Marking Glass Plate Light-Shielding Layer
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Solution Overview
Problem
Existing methods for forming identification marks on glass plates, such as shot blasting and laser irradiation of plastic panes, either weaken the glass or lead to durability issues and readability problems over time.
Innovation Solution
A glass plate with a light-shielding layer along its peripheral edge, where an identification mark is formed using a laser beam to create circular openings in the layer, ensuring the glass surface remains intact and the mark remains readable for long periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If shot blasting method is used to form identification mark on glass plate, then identification mark can be formed, but strength of glass plate decreases
Solution Approach 1:
A light-shielding layer is introduced as an intermediary between the glass plate and the identification mark. The layer absorbs laser energy to form the mark, preventing direct laser impact on the glass and thus preserving glass strength while enabling mark formation.
Solution Approach 2:
The mechanical shot blasting method is replaced with a laser-based process. The laser forms the identification mark by interacting with the light-shielding layer rather than mechanically impacting the glass surface, eliminating strength degradation.
2Manufacturing precision
If laser beam is applied to plastic pane to form identification mark, then identification mark can be formed, but readability deteriorates over time due to plastic damage
Solution Approach 1:
The substrate material for the identification mark is changed from plastic to a light-shielding layer on glass. This parameter change ensures the mark is formed on a stable, non-deteriorating surface while maintaining laser-formability.
Solution Approach 2:
The light-shielding layer serves as a stable intermediary that can be laser-formed while protecting the underlying glass. This intermediary provides a durable base for the identification mark that does not deteriorate like plastic.
3Productivity
If laser beam with high output power is used to form identification mark quickly, then productivity increases, but risk of glass damage increases
Solution Approach 1:
The light-shielding layer acts as a protective intermediary that absorbs laser energy, allowing high-power laser beams to be used for rapid mark formation without the energy reaching and damaging the glass plate.
Solution Approach 2:
The direct laser-glass interaction is replaced with laser-light shielding layer interaction. This substitution enables the use of higher laser powers for faster processing while eliminating the harmful effect on glass.
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 maintains the glass plate's strength and ensures long-term readability by forming identification marks using a laser on a light-shielding layer, preventing damage to the glass and ensuring the mark remains legible.
Implementation Method 1
a step of applying the laser beam toward the light-shielding layer of the glass plate from a laser beam source, and forming a plurality of second openings in a substantially circular shape having a radius of at least 0.05 mm and at most 0.3 mm
Data Source
AI summary
A glass plate with an identification mark and a process for forming an identification mark on a glass plate are configured such that the identification mark includes a plurality of first openings, each of the first openings further includes a plurality of second openings, each of which has a smaller area than each of the first openings, and each of the second openings is formed in a substantially circular shape having a radius of at least 0.05 mm and at most 0.3 mm.