Glass Substrate Incision Defect Detection via Plasma Ion Penetration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Glass substrates often have defects such as holes, grooves, or cracks on their incision surfaces, which reduce their bending strength, making it difficult to determine their suitability for use in display devices like OLEDs and LCDs.
Innovation Solution
A method involving plasma processing using a mixture of reaction and etching gases to visualize defects on the glass substrate's incision surface, followed by photography to assess the bending strength based on defect size, allowing for the classification of substrates as suitable or unsuitable for use in display devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If glass substrates are cut from glass mother substrate, then production efficiency is improved, but defects such as holes, grooves, and cracks remain on the incision surface reducing bending strength
Solution Approach 1:
The patent applies preliminary action by performing plasma processing on the incision surface before final inspection and classification. This treatment penetrates ions into the surface to visualize and reinforce defect detection, allowing early identification of substrates with compromised bending strength due to cutting-induced defects
Solution Approach 2:
The patent uses plasma processing as an intermediary substance/process between the cutting operation and the final quality assessment. The plasma treatment with specific gases (CF4, NF3, O2, Ar, He) acts as a mediator that highlights defects through surface modification, enabling indirect detection of bending strength issues without direct mechanical testing
2Measurement precision
If plasma processing is performed to visualize defects, then measurement precision of defect size is improved, but device complexity and processing time increase
Solution Approach 1:
The patent applies parameter changes by systematically varying plasma processing parameters including gas composition (mixtures of CF4, NF3, O2, Ar, He), processing time (1-30 minutes), and power levels to optimize defect visualization. These parameter adjustments enable precise defect size measurement while controlling processing complexity through standardized parameter sets
Solution Approach 2:
The patent uses photography to create optical copies of the plasma-treated incision surface, capturing defect patterns and sizes for subsequent analysis. This copying approach allows precise measurement without requiring complex in-situ measurement devices, reducing device complexity while maintaining measurement precision
3Measurement precision
If plasma processing time is extended to improve defect visualization, then measurement precision is improved, but productivity decreases
Solution Approach 1:
The patent optimizes the balance between measurement precision and productivity by establishing specific plasma processing time ranges (1-30 minutes, with preferred ranges of 5-15 minutes). This parameter optimization ensures sufficient defect visualization while preventing excessive processing times that would reduce throughput
Solution Approach 2:
The patent applies partial action by using plasma processing durations that are sufficient for adequate defect visualization but not excessively long. The optimized time ranges provide the minimum necessary treatment to achieve measurement precision without the diminishing returns of extended processing, thereby maintaining productivity
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 effectively determines the bending strength of glass substrates by visualizing and measuring defects, enabling the classification of substrates for appropriate use in display devices, thereby improving the selection process and ensuring the quality of glass substrates.
Implementation Method 1
performing plasma processing on the incision surface
Implementation Method 2
penetrating ions into an incision surface of the glass substrate to visualize defects
Implementation Method 3
The plasma processing may be performed by using a mixture of a reaction gas and an etching gas
Data Source
AI summary
A method of detecting defects of a glass substrate includes cutting a glass mother substrate into a plurality of glass substrates, penetrating ions into an incision surface of the glass substrate to visualize defects of the incision surface, and photographing the defects of the incision surface to determine a bending strength of the glass substrate based on a size of the defects.