Transparent Mother Sheet Laser Contours for In-Situ Glass Processing
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Solution Overview
Problem
Current methods for cutting and processing glass substrates are inefficient, lacking speed, cleanliness, cost-effectiveness, repeatability, and reliability.
Innovation Solution
A method involving laser processing where a pulsed laser beam is used to form closed contours with defects in a transparent mother sheet, allowing for the separation of transparent articles while maintaining frictional engagement with the mother sheet, enabling subsequent surface processing and release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional cutting methods are used to separate glass substrates, then separation can be achieved, but the process is slow, messy, and unreliable
Solution Approach 1:
The glass substrate is segmented into multiple transparent articles through laser-formed closed contours that create defect patterns. The laser beam traverses the mother sheet to form multiple closed contours simultaneously, defining perimeters of multiple articles in a single pass, thereby achieving fast and reliable separation through pre-defined separation paths
Solution Approach 2:
Closed contours with defect patterns are formed in advance within the transparent mother sheet before separation occurs. These pre-formed contours act as predetermined separation paths that guide the subsequent breaking process, ensuring reliable and clean separation along the intended paths without the need for complex real-time control during separation
2Productivity
If traditional separation methods are used, then articles can be separated, but the process generates debris and contamination
Solution Approach 1:
The traditional mechanical cutting and separation processes are replaced with a laser-based system that forms closed contours with controlled defect patterns. The laser-induced defects create predetermined breaking paths that guide clean separation without mechanical contact, eliminating debris generation from mechanical tools and contamination from contact with cutting surfaces
Solution Approach 2:
The laser-induced defects, which could be considered harmful imperfections, are actually converted into beneficial features that guide clean separation. The defects create controlled stress concentration points that guide the breaking process along precise paths, resulting in clean edges without debris rather than random fracturing
3Productivity
If articles are separated immediately after laser forming, then separation is achieved, but handling and subsequent processing becomes difficult
Solution Approach 1:
Multiple transparent articles remain frictionally engaged with the frame portion of the mother sheet after separation, forming an integrated assembly. This merged structure allows the articles to be handled as a single unit during subsequent processing steps such as coating, while still being individually defined by their closed contours. The articles can be released individually when needed
4Manufacturing precision
If multiple processing steps are used for surface modification, then quality can be achieved, but process time increases
Solution Approach 1:
The laser system serves multiple functions: it forms the closed contours for separation, creates the defect patterns for controlled breaking, and performs surface modification on the separated articles. This multi-functional approach eliminates the need for separate processing equipment and steps, achieving high surface quality and precise contour formation in a single integrated process
Solution Approach 2:
The laser beam continuously traverses the mother sheet to form multiple closed contours in sequence without interruption. The same laser system then continues to process the separated articles for surface modification without requiring removal or repositioning, maintaining continuous useful action throughout the entire process from separation to surface treatment
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 enhances the efficiency of glass substrate processing by enabling faster, cleaner, and more reliable separation and processing of transparent articles, while also allowing for in-situ surface modification and easier handling.
Implementation Method 1
a portion of the pulsed laser beam directed into the transparent mother sheet generates an induced absorption within the transparent mother sheet, the induced absorption producing a defect within the transparent mother sheet
Implementation Method 2
directing a pulsed laser beam oriented along a beam pathway and output by a beam source into the transparent mother sheet
Implementation Method 3
at least one of the one or more transparent articles is frictionally engaged with a frame portion of the transparent mother sheet
Data Source
AI summary
A method for processing a transparent mother sheet includes forming one or more closed contours in the transparent mother sheet that each define a perimeter of a transparent article. Forming each of the one or more closed contours includes directing a pulsed laser beam into the transparent mother sheet to produce defect within the transparent mother sheet and translating the transparent mother sheet and the pulsed laser beam relative to each other thereby laser forming defects along the one or more closed contours. The method further includes separating a portion of the transparent mother sheet along the closed contours, thereby forming one or more transparent articles, where the transparent articles are frictionally engaged with a frame portion of the transparent mother sheet, applying material to a surface the transparent articles, and releasing the transparent articles from frictional engagement with the frame portion.