Pigment Layer for Permanent Glass Scribing
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Solution Overview
Problem
Existing methods for permanent scribing on glass substrates, such as laser engraving and laser transfer films, face challenges in achieving high contrast, resolution, and temperature stability while ensuring the scribe mark is not removable and maintains mechanical stability.
Innovation Solution
A pigment layer based on a polymer matrix with a titanium donor and carbon donor, which forms titanium carbide upon high-energy radiation, providing a high-contrast, durable, and temperature-stable scribe mark without the need for glass frit or melting materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional laser engraving or sandblasting is used on glass, then scribing can be achieved, but the contrast is low and mechanical stability is altered due to material removal
Solution Approach 1:
A pigment layer comprising organic peroxide crystals is introduced as an intermediary between the laser beam and the glass substrate. This pigment layer absorbs laser energy and converts it to heat, which then acts on the glass to create a permanent mark. The pigment layer protects the glass from direct laser damage while enabling high-contrast marking, thus resolving the contradiction between mark visibility and substrate integrity
Solution Approach 2:
The invention changes the physical state of the pigment layer from solid organic peroxide crystals to a heated state upon laser irradiation. This parameter change (temperature increase) enables the pigment to transfer energy to the glass without removing glass material, thereby maintaining mechanical stability while achieving high-contrast marks through chemical or physical changes in the glass surface
2Reliability
If laser transfer film methods are used, then permanent marking can be achieved, but the process complexity increases and temperature stability above 200°C is compromised
Solution Approach 1:
The invention extracts and eliminates the carrier layer and adhesive layer from conventional laser transfer films, retaining only the essential pigment functionality. By using free-standing organic peroxide crystals that can be directly applied to the glass surface without requiring a supportive carrier or adhesive bonding, the process complexity is reduced while maintaining permanent mark formation through direct laser-induced chemical changes in the glass
3Illumination intensity
If material removal methods are used for scribing, then marks can be created, but the mechanical stability of the component is altered
Solution Approach 1:
Instead of using harmful material removal that compromises structural integrity, the invention converts laser energy into beneficial localized heating through the pigment layer. This heat causes chemical changes or phase transitions in the glass that create visible marks without removing material, thus transforming the potentially harmful laser-glass interaction into a beneficial marking process that preserves mechanical strength
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 pigment layer enables rapid, precise, and permanent scribing on glass with high contrast and resolution, maintaining mechanical stability and resistance to environmental factors, and is resistant to removal attempts.
Implementation Method 1
the polymer matrix reacts with pulverization when irradiated with high-energy radiation, for example, with laser radiation
Implementation Method 2
irradiated with high-energy radiation, more particularly with laser radiation
Implementation Method 3
the titanium compound is cleaved. The marking deposited in this process is a new titanium compound, more particularly titanium carbide
Implementation Method 4
When the high-energy radiation, more particularly a laser beam, strikes the pigment layer
Data Source
AI summary
Pigment layer intended particularly for the permanent marking of glass, based on a polymer matrix which reacts predominantly with pulverization to a high-energy beam, more particularly to laser irradiation, comprising at least one titanium donor and a carbon donor which provides free carbon under energy irradiation.