UTG Laser Cutting With Partial Coating to Minimize Heat Damage
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Solution Overview
Problem
The existing methods for cutting thin-film glass, such as CNC and laser processing, result in micro-cracks, heat damage, and increased production costs due to time-consuming and complex processes, which degrade the strength and durability of cell-unit thin-film glasses used in electronic products.
Innovation Solution
A method involving coating the front surface of a thin-film mother glass with a protective film and forming a partial acid-resistant coating on the rear surface, followed by infrared laser cutting along a guided line to separate the cell-unit thin-film glass, and subsequent selective chemical treatment to heal and reinforce the cut surface, reducing defects and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If laser cutting is used to cut thin-film mother glass, then cutting speed and precision are improved, but heat damage occurs around the cutting surface causing easy breakage
Solution Approach 1:
The patent introduces an acid-resistant coating film as an intermediary layer between the laser beam and the glass substrate. This coating film absorbs the laser energy and converts it to chemical energy through photolysis, preventing direct heat transfer to the glass and eliminating heat damage while maintaining cutting precision
Solution Approach 2:
The patent changes the physical and chemical parameters of the cutting process by applying a coating film that alters the interaction between laser and glass. The coating film's optical and chemical properties enable laser energy absorption and conversion, transforming the cutting mechanism from thermal to photochemical
2Manufacturing precision
If face milling and chamfering processes are performed on thin-film mother glass, then micro cracks and micro chippings are reduced, but production time and labor costs increase significantly
Solution Approach 1:
The patent extracts and eliminates the need for face milling and chamfering processes by using laser cutting with acid-resistant coating that produces clean cuts without micro cracks or chippings, achieving surface quality improvement while removing time-consuming post-processing steps
Solution Approach 2:
The patent replaces mechanical cutting processes (face milling, chamfering) with a photochemical laser cutting process that uses light energy and chemical reactions to cut the glass, eliminating the need for mechanical post-treatment while achieving superior surface quality
3Productivity
If multiple processing steps including stacking, resin application, and chemical healing are performed, then production of cell-unit thin-film glass is achieved, but production costs and process complexity increase
Solution Approach 1:
The patent applies the acid-resistant coating film to the glass surface before cutting, preparing the material in advance to receive laser energy without heat damage. This preliminary action enables direct laser cutting without subsequent chemical healing or complex post-processing steps
Solution Approach 2:
The patent combines the coating application and cutting operations into a streamlined process where the pre-coated glass is directly cut by laser without intermediate stacking, resin application, or chemical healing steps, reducing overall process complexity while maintaining production capability
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 simplifies the manufacturing process, reduces production costs, and enhances the durability of cell-unit thin-film glasses by minimizing heat damage and defects during laser cutting, thereby improving the flexural strength and reducing the complexity of the glass-cutting process.
Implementation Method 1
irradiating the rear surface of the thin-film mother glass (1) with a laser beam to cut the coating film, formed on a front surface of the thin-film mother glass (1), and the thin-film mother glass (1)
Implementation Method 2
a coating solution for preventing chemical contact... form a coating film... irradiating... with a laser beam to cut the coating film
Data Source
AI summary
A method for laser-cutting and post-treating a UTG having a partial coating film formed thereon according to the present invention includes a step (S1) of coating an entire front surface of a thin-film mother glass (1) with a coating solution for preventing chemical contact, and then drying the resulting product to form a coating film, a step (S2) of forming, on a rear surface of the thin-film mother glass (1), a partial coating film (2) which is the same shape as the shape of a cell-unit thin-film glass (3) to be cut from the thin-film mother glass (1), and a step (S3) of irradiating the rear surface of the thin-film mother glass (1) with a laser beam to cut the coating film, formed on a front surface of the thin-film mother glass (1), and the thin-film mother glass (1), wherein the laser beam is applied along a cut guiding line (6) formed a predetermined distance away from an outer edge line of the partial coating film (2) and in the shape of the cell-unit thin-film glass (3), to cut and then separate the cell-unit thin-film glass (3) from the thin-film mother glass (1).