Laser-Marked Glass Substrates for Readable Container Identification
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Solution Overview
Problem
Conventional methods for marking pharmaceutical containers, such as labels and direct ink printing, are inefficient, prone to failure under extreme conditions, and difficult to read on transparent surfaces like glass, leading to potential health risks and increased costs due to incorrect identification and disposal issues.
Innovation Solution
A substrate with a marking element featuring controlled geometric and surface parameters, including a ratio of depth and surface roughness between 2 and 35, allows for a high-contrast marking that can be read using conventional scanners, even on transparent surfaces like glass, without additional coatings or materials, using techniques like laser ablation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a label is glued on the container surface, then identification can be provided, but the process is slow and complicated, representing a bottleneck in production
Solution Approach 1:
The patent replaces mechanical labeling systems with laser-based marking systems. The laser directly marks the container surface through ablation or melting, eliminating the need for physical label application processes. This substitution of mechanical operations with optical/thermal processes resolves the contradiction by maintaining identification reliability while dramatically increasing production speed.
Solution Approach 2:
The patent performs the marking action directly on the container surface during or immediately after the forming process, rather than as a separate subsequent step. By integrating the marking operation into the manufacturing flow and using laser's ability to mark instantly, the system eliminates the time-consuming label application step while ensuring permanent identification.
2Reliability
If a printed code is used on the container, then identification can be provided, but the code size is limited by the printing method and cannot be reduced sufficiently for small containers
Solution Approach 1:
The patent replaces conventional printing methods with laser marking technology. The laser can create high-contrast marks with extremely fine feature sizes by controlling the focal point and energy density. This allows generation of compact identification patterns (such as Data Matrix codes) that fit on small container surfaces while maintaining scanability and identification reliability.
Solution Approach 2:
The patent utilizes the laser's ability to dynamically adjust parameters such as pulse duration, power, and focal position to create marks of varying sizes and complexities. By changing these parameters, the system can generate identification patterns optimized for small surfaces without sacrificing readability, thus resolving the area limitation imposed by conventional printing.
3Reliability
If a label is glued on the container, then identification can be provided, but the label may peel off when exposed to water or extreme conditions
Solution Approach 1:
The patent replaces adhesive-based labeling with direct surface marking using laser. The laser modifies the container surface material itself through ablation, melting, or coloration, creating an integral part of the container structure. This eliminates the adhesive interface that would fail under environmental stress, ensuring identification remains available even when exposed to water, heat, or mechanical stress.
Solution Approach 2:
The patent merges the identification mark with the container substrate by directly marking the surface material. The mark becomes an inherent feature of the container rather than a separate applied layer. This merging ensures that the identification system shares the same environmental resistance properties as the container itself, eliminating peeling or delamination issues.
4Reliability
If ink is used to print directly on the container, then identification can be provided, but the printed code may vanish when exposed to water or extreme conditions
Solution Approach 1:
The patent replaces ink-based printing with laser material modification. Instead of applying a separate ink layer that can wash away or degrade, the laser directly modifies the container surface material through controlled ablation, melting, or thermal decomposition. This creates a permanent mark that is integral to the substrate and resistant to environmental factors such as water, heat, and chemical exposure.
Solution Approach 2:
The patent creates a composite structure at the surface level where the marked region has different physical or chemical properties than the bulk material. Through laser-induced changes such as crystallization, amorphization, or formation of oxide layers, the marked area becomes a composite structure with enhanced durability and environmental resistance while maintaining the identification function.
5Reliability
If laser ablation is used to grave a marking element in glass surface, then the marking is durable and cheap, but conventional barcode scanners cannot recognize the graved marking element on transparent glass surface
Solution Approach 1:
The patent utilizes laser-induced color changes in the glass material to create high-contrast marks. By controlling laser parameters such as wavelength, power, and pulse duration, the system creates localized regions with different optical absorption characteristics. These colored or darkened regions provide sufficient contrast against the transparent glass background, enabling conventional optical scanners to detect and read the marks while maintaining the durability of laser-marked surfaces.
Solution Approach 2:
The patent optimizes laser processing parameters specifically for transparent materials like glass. By adjusting wavelength (e.g., using UV or infrared lasers), pulse duration, and focal position, the system creates marks with optimal optical contrast for scanner detection. The parameter changes enable the laser to modify the glass surface in ways that enhance visibility to conventional scanners while preserving the inherent durability of laser-marked glass surfaces.
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
This approach provides a durable, reliable, and cost-effective marking solution that ensures accurate identification of containers, reducing the risk of incorrect assignment and disposal costs, while being compatible with existing infrastructure.
Implementation Method 1
using techniques like laser ablation
Implementation Method 2
A marking element provided in that way on the container would indeed be cheap in the production process
Data Source
Figure 1a
Figure 1b
Figure 2a
AI summary
The present invention relates to a substrate having a marking element, a container comprising such a substrate and a method for producing a substrate having a marking element, preferably a substrate according to the invention.