Bar-Type LED Support Structure for Stable Micro-LED Fabrication
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Solution Overview
Problem
The challenge in fabricating micro-bar-type LEDs lies in maintaining their precise alignment during subsequent processes due to their small size, which affects the reliability and efficiency of light emitting devices, particularly in self-luminescent display panels.
Innovation Solution
A light emitting device design featuring a substrate with first and second electrodes spaced apart, a bar-type LED with a length greater than its width, and an insulative support body between the substrate and the LED, along with conductive contact layers connecting the LED to the electrodes, ensures stable alignment and prevents deviation during fabrication processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If bar-type LEDs are made small in size for micro or nano scale applications, then they become suitable for use in pixels of self-luminescent display panels, but their alignment becomes difficult to maintain during subsequent fabrication processes
Solution Approach 1:
A support structure is introduced as an intermediary element between the substrate and the bar-type LED. This support structure includes a support body that contacts the substrate and a support rod that extends upward to contact the bar-type LED, providing physical support and maintaining alignment during fabrication processes.
Solution Approach 2:
The support structure is formed in advance before the bar-type LED is mounted. The support body and support rod are prepared on the substrate beforehand, creating a pre-established alignment framework that guides and maintains the position of the subsequently mounted bar-type LED.
2Volume of moving object
If bar-type LEDs are made small in size, then they can be used in compact display pixels, but their stability during subsequent processes deteriorates
Solution Approach 1:
The support structure acts as a mediator that provides mechanical stability to the small bar-type LED. The support body anchored to the substrate and the support rod extending to the LED create a stable framework that prevents deviation during subsequent fabrication processes.
Solution Approach 2:
The support structure is divided into two functional segments: a support body that provides base anchoring to the substrate and a support rod that provides vertical support to the bar-type LED. This segmentation allows each part to perform its specific stabilizing function effectively.
3Device complexity
If bar-type LEDs are mounted without support structures, then the fabrication process is simpler, but deviation during subsequent processes increases
Solution Approach 1:
The support structure serves as a reliable intermediary that ensures accurate alignment between the bar-type LED and the electrodes. By providing physical support and positioning guidance, it maintains alignment reliability throughout subsequent fabrication processes.
Solution Approach 2:
The support structure is prepared in advance during the fabrication process, establishing a reliable alignment framework before the bar-type LED is mounted. This preliminary preparation ensures that when the LED is subsequently mounted and connected to electrodes, proper alignment is maintained.
Data Source
AI summary
A light emitting device including first and second electrodes spaced apart from each other on a substrate, at least one bar-type LED having a first end on the first electrode and a second end on the second electrode, and an insulative support body between the substrate and the bar-type LED. The at least one bar-type LED has a length greater than a width.