Light-Emitting Device Electrode Groove for Paste Protrusion
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Solution Overview
Problem
Conventional anisotropic conductive paste used in mounting light-emitting elements can protrude into adjacent mounting regions, causing connection defects between sequentially mounted elements.
Innovation Solution
A light-emitting device with a substrate featuring a groove in the electrode between mounting regions to prevent anisotropic conductive paste protrusion, combined with anisotropic conductive films connecting the elements to electrodes, ensuring proper alignment and connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anisotropic conductive paste is used to mount light-emitting elements, then electrical connectivity is improved, but connection defects occur due to paste protrusion into adjacent mounting regions
Solution Approach 1:
The electrode is divided into multiple isolated regions by forming grooves between mounting regions. This segmentation prevents the anisotropic conductive paste from spreading between adjacent mounting regions, eliminating connection defects while maintaining electrical connectivity within each segmented electrode region.
Solution Approach 2:
The groove acts as an intermediary barrier between adjacent mounting regions. It physically separates the anisotropic conductive paste applied to one mounting region from adjacent regions, preventing harmful paste protrusion while allowing the paste to fulfill its electrical connection function within the designated area.
2Object-affected harmful factors
If a groove is formed in the electrode between mounting regions, then paste protrusion is prevented, but device complexity increases
Solution Approach 1:
The groove creates simple segmentation of the electrode into isolated regions. This segmentation approach prevents paste protrusion through a straightforward geometric division rather than complex multi-layer structures, maintaining manufacturing simplicity while solving the protrusion problem.
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 solution effectively suppresses connection defects and enhances electrical connectivity between light-emitting elements, improving light-extraction efficiency by using reflective particles in the conductive films.
Implementation Method 1
anisotropic conductive paste in which conductive particles are dispersed in an adhesive agent
Implementation Method 2
anisotropic conductive adhesive agent containing light-reflective electrically insulating particles to improve light extraction efficiency
Data Source
AI summary
A light-emitting device and a method for manufacturing the same capable of suppressing connection defects of light-emitting elements and improving electrical connectivity. A substrate includes a first mounting region for mounting a first light-emitting element, a second mounting region for mounting a second light-emitting element, a first electrode connected to one electrode of the first light-emitting element and one electrode of the second light-emitting element, a second electrode formed in the first mounting region and connected to the other electrode of the first light-emitting element, and a third electrode formed in the second mounting region and connected to the other electrode of the second light-emitting element. In the first electrode, a groove is formed between the first mounting region and the second mounting region.