Light-Emitting Element Transfer Stamp With Spring Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for transferring micro-light-emitting elements suffer from vibration issues during the transfer process, leading to reduced yield and misalignment of light-emitting element chips.
Innovation Solution
A stamp for transferring light-emitting elements equipped with a spring damper to absorb vibration, ensuring uniform contact and load, thereby minimizing chip drop and misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a spring is used in the stamp to enable pickup portions to pick up light-emitting elements, then the pickup capability is improved, but vibration is generated during the transfer process
Solution Approach 1:
A damper part is introduced as an intermediary component between the elastic part and the substrate. The damper part absorbs vibration generated in the elastic part during the transfer process, while allowing the elastic part to maintain its pickup capability. This mediator resolves the contradiction by separating the pickup function from the vibration problem.
Solution Approach 2:
The vibration generated by the spring during operation is converted from a harmful effect into a beneficial one by introducing the damper part. The damper part utilizes the vibration energy and dissipates it, transforming the harmful vibration into heat energy through damping, thereby stabilizing the transfer process while maintaining the spring's elastic pickup function.
2Productivity
If vibration is not controlled, then the transfer process is simple, but transfer yield decreases due to chip drop and misalignment
Solution Approach 1:
The stamp structure is segmented into distinct functional components: the substrate, the elastic part for pickup, and the damper part for vibration control. This segmentation allows each component to perform its specific function optimally, with the damper part specifically addressing vibration to improve transfer yield without requiring complete redesign of the entire stamp system.
Solution Approach 2:
The damper part is incorporated into the stamp structure beforehand to prevent vibration-related issues before they occur during the transfer process. By providing vibration damping in advance, the system prevents chip drop and misalignment, thereby improving transfer yield without requiring complex post-processing or correction mechanisms.
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 spring damper system enhances the transfer yield and accuracy of light-emitting elements by damping spring vibrations, improving the overall efficiency of the transfer process.
Implementation Method 1
an elastic part disposed between the pickup portion and the substrate
Implementation Method 2
a damper part configured to absorb vibration generated in the elastic part
Data Source
AI summary
A light-emitting element transfer stamp can include a stamp substrate, an elastic part disposed on the stamp substrate, a pickup portion disposed on the elastic portion, and a damper part connected to the elastic part. A method for fabricating a display device using the light-emitting element transfer stamp is also discussed.