LED Display Partition Alignment with Separation Film
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Solution Overview
Problem
The miniaturization and performance improvement of semiconductor devices in light emitting diode display devices are hindered by misalignment of constituent elements, particularly the separation film and partition in the color conversion layer, which affects the overall performance and yield of the devices.
Innovation Solution
A light emitting diode display device is designed with a separation film and a partition material, where the partition is aligned with the separation film, including linear portions that extend in a specific direction and overlap vertically, using an insulating material different from silicon, to improve alignment and yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the separation film and partition are not aligned, then the manufacturing process is simpler, but the performance and yield of the light emitting diode display device deteriorate
Solution Approach 1:
The partition is formed to extend below the color conversion layer and align with the separation film before the color conversion layer is deposited. This preliminary alignment structure ensures that when the color conversion layer is formed, the partition automatically aligns with the separation film, achieving precise alignment without requiring complex post-processing steps or high-precision alignment equipment.
2Reliability
If misalignment of constituent elements occurs, then the device structure remains simple, but the performance and yield of the light emitting diode display device deteriorate
Solution Approach 1:
The partition structure is pre-formed to extend into the color conversion layer region with lateral dimensions and positioning that predetermine the alignment. This preliminary structure acts as a template that guides the subsequent formation of the color conversion layer, ensuring accurate alignment and improving device yield by preventing misalignment defects.
3Manufacturing precision
If the partition material is silicon, then the material selection is conventional, but the alignment precision and yield are insufficient
Solution Approach 1:
The patent changes the material parameter from conventional silicon to silicon oxide for the partition. This material substitution provides better etch selectivity and alignment precision because silicon oxide can be more precisely controlled during deposition and etching processes, enabling the partition to maintain accurate alignment with the separation film throughout subsequent manufacturing steps.
Data Source
AI summary
A light emitting diode display device is provided. The light emitting diode display device includes a first light emitting diode pixel including a first light emitting diode layer and a first color conversion material on the first light emitting diode layer, a second light emitting diode pixel including a second light emitting diode layer and a second color conversion material on the second light emitting diode layer, a separation film disposed between the first light emitting diode layer and the second light emitting diode layer and a partition disposed between the first color conversion material and the second color conversion material and including a partition material, wherein the first and second light emitting diode pixels are divided by the separation film and the partition, the partition is disposed on the separation film in alignment with the separation film such that the partition includes linear portions that extend in a first direction and the separation film includes linear portions that also extend in the first direction and vertically overlap the linear portions of the partition, and the partition material includes an insulating material different from silicon.