Micro LED Layout With Separated Magnetic Region for Assembly Reliability
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Solution Overview
Problem
Existing light emitting diode (LED) assembly methods face challenges with reduced assembly rates due to damage from magnetic substances, leading to inefficiencies and potential color mixing or shorts in micro LED displays.
Innovation Solution
A light emitting diode design with a magnetic substance positioned to not overlap the active layer, allowing for improved detection and assembly by separating the magnetic substance from the electrodes, reducing damage and enhancing assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic substance is included in the light emitting diode for assembly purposes, then the light emitting diode can be assembled to the assembly substrate even if damaged, but the assembly rate decreases due to damage detection issues
Solution Approach 1:
The patent segments the magnetic substance from the light-emitting functional area by positioning it in a region that does not overlap with the active layer. This separation allows the magnetic substance to serve its assembly function while preventing it from interfering with light emission and damage detection, thereby resolving the contradiction between assembly reliability and assembly rate
Solution Approach 2:
The patent extracts the magnetic substance from the active layer region and places it in a separate location on the semiconductor layer. This extraction eliminates the harmful overlap between the magnetic substance and the light-emitting area, allowing damaged LEDs to be properly detected while maintaining magnetic assembly capability
2Ease of manufacture
If the magnetic substance overlaps with the active layer, then assembly is simplified, but damage detection becomes difficult leading to color mixing and shorts
Solution Approach 1:
The patent divides the semiconductor layer into distinct functional regions: one containing the active layer for light emission and another containing the magnetic substance for assembly. This spatial segmentation enables both simple magnetic assembly and precise damage detection of the active layer, resolving the contradiction between manufacturing ease and measurement precision
Solution Approach 2:
The patent assigns different local qualities to different regions of the semiconductor layer. The active layer region is optimized for light emission and damage detection, while the magnetic substance region is optimized for magnetic assembly. This local differentiation allows each region to perform its function optimally without interfering with the other
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 design improves assembly rates by enabling detection of damaged LEDs and preventing assembly of non-functional units, thus increasing the reliability and uniformity of LED displays.
Implementation Method 1
an assembly method using magnetism is used. Specifically, after the electrode of the light emitting diode is formed to have magnetism, the electric field may be generated by applying a voltage to the assembly substrate. When the electric field is generated, the light emitting diode may be assembled in the groove of the assembly substrate by the magnetism of the electrode of the light emitting diode.
Data Source
AI summary
A light emitting diode is provided, which comprises a first electrode disposed on a first region of a first semiconductor layer, and a magnetic substance that does not overlap an active layer and is disposed on a second region of the first semiconductor layer. In addition to, a light emitting diode is provided, which comprises a first electrode disposed on a first region of a first semiconductor layer, and a magnetic substance that is disposed on the second semiconductor layer and overlaps a second region of the first semiconductor layer.