Brittle Sheet Cutting via Segmented Laser Lines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods struggle to cut brittle materials like silicon wafers, glasses, and ceramics into complex shapes such as circular, elliptical, or irregular polygonal forms without fracturing along regular planes, making it difficult to obtain specific-shaped structures.
Innovation Solution
A method involving forming a first cutting line on the surface of the brittle material to create sections, followed by additional cutting lines that distribute stress and guide the splitting process, allowing for the precise cutting of complex shapes using a combination of laser-formed cutting lines and mechanical splitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If ordinary cutting methods (laser or external force) are used to form cutting lines on brittle materials, then rectangular sections can be obtained, but complex shapes (circular, elliptical, fan-shaped, irregular polygonal) cannot be produced
Solution Approach 1:
The cutting process is divided into multiple stages: first forming an initial cutting line to define the predetermined shape, then forming additional cutting lines along the first cutting line or its tangent lines, and finally splitting along all cutting lines to obtain the desired complex shape
Solution Approach 2:
The first cutting line is formed in advance to define the predetermined shape before the actual splitting operation. This preliminary marking guides subsequent cutting operations and ensures the final shape matches the design requirements
2Shape
If multiple cutting lines are formed to create complex shapes, then shape variety improves, but stress distribution becomes uncontrolled causing unwanted fracturing
Solution Approach 1:
Different regions of the material receive different treatments: the first cutting line defines the boundary of the desired shape, while additional cutting lines are formed along specific portions (tangent lines or overlapping lines) to guide stress distribution during splitting, ensuring fractures occur only along intended paths
Solution Approach 2:
The additional cutting lines act as intermediaries that guide stress propagation during the splitting process. These lines serve as predetermined fracture paths that control where the material will break, preventing unwanted fracturing outside the desired shape
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
Enables the production of brittle sheet-shaped structures with predetermined shapes, such as circular or fan-shaped silicon wafers, while reducing stress and avoiding contamination of functional layers like carbon nanotube arrays, facilitating the creation of various particular-shaped structures.
Implementation Method 1
forming cutting lines on surface of the brittle materials with laser
Data Source
AI summary
A method for cutting brittle sheet-shaped structure is disclosed. A brittle sheet-shaped structure having a cutting surface including a first cutting line on the cutting surface of the brittle sheet-shaped structure is formed. The cutting surface is divided into a first section and a second section, wherein the first section has a predetermined shape. At least one second cutting line is formed on the second section along part of the first cutting line or a tangent line of the first cutting line. A number of third cutting lines are formed on the second section by taking the first cutting line as endpoints. A brittle sheet-shaped structure having the predetermined shape is finally obtained by splitting the brittle sheet-shaped structure along the first cutting line, the at least one second cutting line, and the third cutting lines.