TiO2 Nanoparticle Coating for 1064 Nm Laser Glass Microstructures
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Solution Overview
Problem
Quartz glass has a low absorption rate for 1064 nm infrared nanosecond lasers, making it difficult to process microstructures due to low processing efficiency and high costs associated with current laser technologies.
Innovation Solution
A method involving a titanium oxide nanoparticle coating applied via a hydrogel on the glass surface, increasing the absorption rate of the infrared nanosecond laser, allowing for efficient microstructure fabrication by evenly distributing the nanoparticles between two glass pieces and using specific laser processing parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If infrared nanosecond laser is used to process quartz glass, then processing cost is reduced and processing efficiency is improved, but the absorption rate of laser by glass is too low to enable material removal
Solution Approach 1:
The patent applies titanium oxide nanoparticle coating as an intermediary layer between the infrared nanosecond laser and the quartz glass surface. This coating layer has high absorption coefficient for infrared laser wavelengths, enabling efficient energy absorption and subsequent material removal through laser-induced breakdown and ablation mechanisms
Solution Approach 2:
The patent changes the optical parameters of the glass surface by coating it with titanium oxide nanoparticles. This modification alters the absorption characteristics of the glass, transforming it from a low-absorption material to a high-absorption material for infrared laser wavelengths, thereby enabling effective laser processing
2Productivity
If titanium oxide nanoparticle coating is applied to increase laser absorption, then processing efficiency is improved, but the coating uniformity is difficult to ensure
Solution Approach 1:
The patent employs a slurry suspension system where titanium oxide nanoparticles are dispersed in a liquid carrier. The slurry is applied to the glass surface and then dried to form a uniform coating. The fluid nature of the slurry allows for even distribution of particles across the surface, ensuring coating uniformity
Solution Approach 2:
The patent uses a multi-step process involving repeated cycles of slurry application, drying, and laser processing. This periodic action allows for gradual buildup of uniform coating and systematic removal of excess material, improving overall coating uniformity and processing quality
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 method enables high-efficiency and cost-effective fabrication of microstructures on quartz glass surfaces with improved precision and reduced operational costs, utilizing a common and affordable infrared nanosecond laser.
Implementation Method 1
increases the absorption rate of infrared nanosecond laser at the interface between glass and a titanium oxide nanoparticle coating
Implementation Method 2
forming a microstructure using laser
Data Source
AI summary
A method for preparing a microstructure on the surface of glass by titanium oxide nanoparticle-assisted infrared nanosecond laser, including the following steps: (1) dropwise applying a titanium oxide nanoparticle hydrogel onto the surface of a glass sample; (2) pressing another piece of glass on the surface of the hydrogel, so the hydrogel is evenly distributed between the two pieces of glass, and allowing the two pieces of glass to stand horizontally for a period of time to air-dry the hydrogel; (3) separating the two pieces of glass to obtain a glass with a uniform titanium oxide nanoparticle coating; (4) forming a microstructure using an infrared nanosecond laser with a wavelength of 1064 nm; and (5) performing after-treatment, including ultrasonically cleaning the sample with acetone, absolute ethanol and deionized water respectively for 10 min to remove titanium oxide nanoparticles attached to the surface, to obtain a glass sample with the microstructure.