Servo-Driven Substrate Splitting Bar for Controlled Edge Integrity
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Solution Overview
Problem
Conventional glass substrate cutting methods often result in broken substrates due to high-speed movement of the breaking bar, and deepening pre-cracks can compromise the edge strength and structure of the glass substrate.
Innovation Solution
A substrate splitting apparatus utilizing a servo motor, transmission device, and substrate breaking bar, where the servo motor controls the breaking bar's movement in different speeds and is guided by a pressure sensor to detect and halt pressure on the substrate, ensuring precise and controlled splitting without excessive stress on the substrate edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the substrate breaking bar moves at high speed to improve cutting efficiency, then productivity increases, but the glass substrate may break and manufacturing precision deteriorates
Solution Approach 1:
The patent applies dynamics by making the substrate breaking bar movable with variable speed control. The breaking bar transitions from a static position to a dynamically controlled moving component, where the servo motor adjusts the speed and position during the cutting process. This allows the system to optimize between cutting efficiency and substrate integrity by adapting the breaking bar's motion characteristics in real-time based on process requirements.
2Reliability
If the pre-crack depth is increased to reduce substrate breakage, then reliability improves, but the edge structure strength deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the depth and position of the pre-crack through servo motor-driven movement of the breaking bar. Instead of using a fixed deep pre-crack, the system dynamically adjusts the pre-crack parameters (depth, location) during the cutting process. This allows optimization of both reliability and edge strength by finding the optimal pre-crack depth that prevents breakage while minimizing damage to edge structures.
3Device complexity
If the substrate breaking bar is moved by hammering to simplify the drive mechanism, then device complexity is reduced, but manufacturing precision deteriorates due to uncontrolled high-speed movement
Solution Approach 1:
The patent applies mechanics substitution by replacing the traditional hammering mechanical impact system with a servo motor-driven controlled movement system. Instead of using uncontrolled mechanical hammering forces, the invention uses a servo motor to precisely control the breaking bar's position and speed. This substitution eliminates the randomness of hammering while maintaining the mechanical breaking action, thereby improving position control precision without excessive complexity increase.
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 improves the structural strength and quality of split substrate edges by controlling the breaking process, reducing the likelihood of substrate breakage and maintaining edge integrity, especially when cutting thinner substrates.
Implementation Method 1
The substrate cutting apparatus includes a servo motor, a transmission device, a substrate breaking bar and a stage
Implementation Method 2
detecting the top surface of the substrate using a pressure sensor in order to determine the position where the speed of the servo motor should change
Data Source
AI summary
A substrate splitting apparatus and a method for splitting a substrate using the substrate splitting apparatus are provided. The substrate splitting apparatus includes a servo motor, a transmission device, a substrate breaking bar, and a stage. One end of the transmission is directly or indirectly coupled to the servo motor while the other end is coupled with the breaking bar. The stage has a load-lock surface and the load-lock surface faces the breaking bar. The servo motor drives the transmission device to move the breaking bar toward the load-lock surface. A substrate with a pre-crack on the bottom is disposed on the load-lock surface. The servo motor drives the substrate breaking bar to move towards or away from the pre-crack. The method of splitting includes the following steps: forming a pre-crack on the substrate; controlling the servo motor to drive the breaking bar to move towards the substrate; and controlling the breaking bar to press the substrate at the pre-crack.