Crystalline Sample Cleaving Device High Aspect Ratio
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Solution Overview
Problem
Existing cleaving technologies for crystalline samples, particularly in semiconductor and MEMS devices, face limitations in achieving high length-to-width aspect ratios for cleaved segments with submicron accuracy, typically restricted to less than 6, which hinders detailed imaging and micro-analysis.
Innovation Solution
A device and method utilizing upper and lower bending elements to apply a bending moment and a cleaving element that contacts the sample's side surface, allowing for a 3-point bending moment and orthogonal indentation, enabling cleaving with a high length-to-width aspect ratio up to 30, without requiring precise prealignment of the sample.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional cleaving technologies are used, then the cleaving process is simple, but the length-to-width aspect ratio is limited to less than 6
Solution Approach 1:
The device segments the cleaving function into distinct components: bending elements (upper and lower) that apply localized forces at specific points, and a cleaving element that acts at a different location. This segmentation allows the creation of a 3-point bending moment system that enables high aspect ratio cleaving (up to 30:1) by distributing stresses appropriately across the crystalline sample.
Solution Approach 2:
The invention transitions from conventional single-plane cleaving to a three-dimensional bending moment application system. The upper and lower bending elements are positioned at different heights and locations, creating a spatial 3-point bending configuration that enables control over both the length and width dimensions independently, achieving aspect ratios up to 30:1 while maintaining submicron accuracy.
2Manufacturing precision
If high length-to-width aspect ratio cleaving is achieved, then detailed imaging and micro_analysis become possible, but prealignment precision requirements increase
Solution Approach 1:
The crystalline sample itself serves as the alignment reference through its natural crystallographic structure. The bending elements and cleaving element are positioned to interact with inherent crystal planes and orientations, allowing the material's own structure to guide the cleaving process. This self-alignment mechanism achieves submicron accuracy without requiring external prealignment equipment or complex positioning systems.
Solution Approach 2:
The device changes the mechanical parameters of the cleaving process by applying controlled bending moments rather than direct linear forces. The 3-point bending configuration transforms the stress distribution across the sample, enabling precise control over cleavage propagation direction and position. This parameter transformation allows submicron accuracy to be achieved while maintaining ease of operation, as the bending moment application is less sensitive to initial positioning errors than direct contact methods.
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
The solution enables the production of crystalline sample segments with a length-to-width aspect ratio of up to 30 while maintaining submicron accuracy, facilitating advanced imaging and micro-analysis in semiconductor and materials science applications.
Implementation Method 1
upper and lower bending elements that are arranged to contact upper and lower surfaces of the crystalline sample and to apply a bending moment or force on the crystalline sample
Implementation Method 2
a cleaving element operably connected to a second actuator configured to cause the cleaving element to apply a force to a second side surface of the crystalline sample opposite to the first side surface while the bending moment or force is applied on the crystalline element
Data Source
AI summary
A device for cleaving a crystalline sample, the device comprises: upper and lower bending elements that are arranged to contact upper and lower surfaces of the crystalline sample and to apply a bending moment on the crystalline sample; a first surface impact element that contacts a first surface of the crystalline sample; a cleaving element that is arranged to impact a second surface of the crystalline sample while the bending moment is applied on the crystalline element; wherein the second surface is opposite to the first side and oriented to the upper and lower surfaces of the crystalline sample wherein the device excludes any second surface alignment element for aligning the crystalline sample by contacting the second surface.