Related Experiment Video
Updated: Jan 21, 2026
08:43
Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
Published on: November 7, 2016
8.4K
Electrical Reliability and Bending Test Methodologies of Metal Electrode on Flexible Substrate
Byoung-Joo Kim1, Young-Bae Park1, Young-Chang Joo2
1Materials Research Centre for Energy and Clean Technology, Department of Materials Science and Engineering, Andong National University, Andong 36729, Republic of Korea.
Journal of Nanoscience and Nanotechnology
|August 7, 2019
Summary
Mechanical reliability is crucial for flexible electronics. This study compares four bending test methods, revealing different electrical resistance changes and fatigue damage patterns in copper films, aiding in developing more robust devices.
Area of Science:
- Materials Science
- Electrical Engineering
- Mechanical Engineering
Background:
- Developing highly reliable flexible electronics requires understanding mechanical reliability during deformation.
- Bending test methodologies are essential for estimating long-term reliability under repeated mechanical stress.
Purpose of the Study:
- To introduce and explain four representative bending test methodologies for flexible electronics.
- To investigate the electrical reliability of copper (Cu) films on polymer substrates using these methods.
- To analyze fatigue damage and failure modes under different bending conditions.
Main Methods:
- Introduced four bending test methodologies: free arc bending, variable radius bending, sliding plate, and variable angle tests.
- Investigated electrical reliability of Cu films on polymer substrates via in situ electrical resistance monitoring.
- Analyzed fatigue damage and failure modes by observing crack morphologies.
Main Results:
- Different electrical resistance changes were observed across the four bending test methodologies.
- Fatigue damage and crack morphologies varied depending on the specific test method used.
- The study identified distinct electrical reliability and failure modes associated with each bending test.
Conclusions:
- The choice of bending test methodology significantly impacts the observed electrical reliability and failure modes of flexible electronics.
- Understanding these differences is critical for accurately assessing and improving the long-term mechanical and electrical performance of flexible devices.
- This comparative analysis provides valuable insights for selecting appropriate testing methods in flexible electronics research and industry.
More Related Videos
Related Concept Videos
02:37Metallic Solids
20.5K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.5K
01:29Reliability and Validity
13.8K
Reliability and validity are two important considerations that must be made with any type of data collection. Reliability refers to the ability to consistently produce a given result. In the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways.
13.8K
02:32Bonding in Metals
52.1K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
52.1K
03:06Alkali Metals
24.2K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
Table 1: Properties of the alkali metals
24.2K
01:10Bending
852
Pure bending is a fundamental concept in structural mechanics, essential for understanding how materials deform under symmetrical loads without direct forces. Pure bending occurs when prismatic members, such as beams, are subjected to equal and opposite moments that induce bending. The phenomenon is crucial as it allows for predicting stress distributions without the influence of axial or shear forces.
In pure bending, the bending stress in a beam is calculated based on the bending moment and...
In pure bending, the bending stress in a beam is calculated based on the bending moment and...
852
01:07Symmetric Member in Bending
569
In the study of the mechanics of materials, analyzing the behavior of prismatic members under opposing couples is crucial for understanding internal stress distributions, which are essential for structural design. When subjected to couples, a prismatic member experiences internal forces that maintain equilibrium. A couple, characterized by two equal and opposite forces, creates a moment but no resultant force. The internal forces at any section cut of the member must balance these external...
569