Sample Holder Electrode Layout for Uniform Battery Surface Pressure
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Solution Overview
Problem
Existing techniques face challenges in efficiently applying pressure to the observation surface of all-solid-state batteries using charged particle beam apparatuses, leading to inaccurate observation images due to non-uniform pressure distribution, which can cause electrode cracking and inadequate conduction between layers.
Innovation Solution
A sample holder design featuring a first and second electrode with a pressure applying member that moves horizontally, allowing for precise adjustment of the sample's position between the electrodes, ensuring uniform pressure application on the observation surface, and incorporating a jig for height adjustment to stabilize the sample.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure is applied to a sample using conventional techniques, then the sample can be held in place, but the pressure cannot be efficiently applied to the observation surface resulting in inaccurate observation images
Solution Approach 1:
The pressure applying member is configured to be movable relative to the first electrode, allowing dynamic adjustment of pressure application. The member can move in a horizontal direction to precisely position the pressure application point on the observation surface, enabling efficient and accurate pressure application during observation
Solution Approach 2:
The pressure applying member serves multiple functions: it applies pressure to the observation surface, moves horizontally to position the pressure point, and maintains electrical contact through attachment to the first electrode. This multi-functional design improves both pressure application efficiency and observation accuracy
2Reliability
If non-uniform pressure is applied to hold a laminated all-solid-state battery, then the battery can be secured, but electrode cracking occurs in high-pressure regions and conduction becomes insufficient in low-pressure regions
Solution Approach 1:
The pressure applying member is designed to apply pressure locally and uniformly to the observation surface. By controlling the pressure distribution through its design and movement capability, it ensures adequate pressure in all regions without creating concentration points that would cause electrode cracking
Solution Approach 2:
The pressure application system is designed to achieve uniform pressure distribution across the observation surface. The pressure applying member's configuration and movement capability ensure homogeneous pressure application, preventing both cracking in high-pressure regions and conduction issues in low-pressure regions
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 design enables efficient pressure application to the observation surface, resulting in more accurate observation images and improved battery performance by preventing electrode cracking and ensuring uniform conduction.
Implementation Method 1
a pressure applying member attached to the first electrode and having a function to move the first electrode in a horizontal direction
Implementation Method 2
charged particle beam apparatus such as a scanning electron microscope (SEM)
Data Source
AI summary
A sample holder HL capable of efficiently applying a pressure to an observation surface of a sample SAM is provided. The sample holder HL includes a fixed electrode 4b, a movable electrode 5, and a pressure applying member 6 attached to the movable electrode 5 and having a function to move the movable electrode 5 in a horizontal direction. When the sample SAM is held between a side surface of the fixed electrode 4b and a side surface of the movable electrode 5, an upper surface of the sample SAM is located within a range of a width of the pressure applying member 6 at a position where the pressure applying member 6 is in contact with the movable electrode 5 in the Z direction.