OLED Deposition Nozzle Inclination Angle Optimization
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Solution Overview
Problem
Existing deposition methods for organic light emitting diode (OLED) displays face challenges in achieving uniform deposition and high resolution due to the shadow phenomenon where organic material penetrates between the deposition mask and the substrate, leading to reduced deposition margin and efficiency.
Innovation Solution
A deposition apparatus with a deposition source and spray nozzles arranged in a specific configuration, where the center area and outer areas of the source are aligned with the substrate, and the spray nozzles are inclined at controlled angles to optimize the incident angle of the deposition material, reducing the shadow effect and enhancing deposition uniformity and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If deposition material is sprayed at conventional angles, then deposition coverage is achieved, but shadow phenomena and non-uniform deposition occur
Solution Approach 1:
The patent applies parameter changes by optimizing the spray angle parameter to a specific range of 43-53 degrees. This angular parameter modification transforms the deposition trajectory to eliminate shadow phenomena while ensuring complete substrate coverage, directly resolving the contradiction between achieving deposition coverage and avoiding shadow effects
2Area of stationary object
If spray nozzles are arranged to cover the substrate, then deposition area is increased, but shadowing effects worsen
Solution Approach 1:
The patent changes the spatial arrangement parameters of spray nozzles by positioning them at specific distances and angles (43-53 degrees) relative to the substrate. This parameter optimization allows maximum deposition area coverage while the inclined angular configuration prevents shadowing, simultaneously achieving both objectives
3Manufacturing precision
If deposition material is sprayed vertically, then simple nozzle arrangement is achieved, but deposition uniformity decreases
Solution Approach 1:
The patent modifies the nozzle arrangement by changing the spray angle parameter from vertical (90 degrees) to an inclined range of 43-53 degrees. This parameter change achieves superior deposition uniformity across the substrate while maintaining a relatively simple linear array nozzle configuration, balancing uniformity requirements with structural simplicity
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 controlled deposition apparatus increases the incident angle of the material onto the substrate, reducing the shadow phenomenon, improving deposition uniformity, and increasing the efficiency and resolution of the OLED display manufacturing process.
Implementation Method 1
Existing deposition methods for organic light emitting diode (OLED) displays face challenges with shadow phenomena and non-uniform deposition due to the angle at which deposition materials are sprayed
Data Source
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AI summary
A deposition apparatus includes a deposition source (100) that receives a deposition material, and a plurality of spray nozzles (110, 112, 114) arranged in a first direction (y) at one side of the deposition source to spray the deposition material through mask (220) to a facing substrate (210). The deposition source includes a center area (102) and outer areas (104a and 104b), the outer areas being at respective ends of the center area with reference to the first direction. The spray nozzles include first spray nozzles (114a and 114b)) arranged in each outer area and extending outwardly from the deposition source, a surface forming an end of the first spray nozzles forming a first inclination angle with a substrate surface in the first direction.