Conductive Layer Patterning With Nucleation-Inhibiting Coatings
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Solution Overview
Problem
Current methods for depositing conductive layers in OLED manufacturing are limited by high evaporation temperatures of materials used, leading to increased costs, complexity, and accuracy issues, as well as debris generation during removal processes, which affect yield and are not suitable for all devices with certain topographical features.
Innovation Solution
A semiconductor device with a patterning coating acting as a nucleation-inhibiting layer is used, where an orientation layer is disposed on a substrate, and a deposited layer is selectively applied on a second portion, avoiding a closed coating on the first portion, to improve patterning contrast and prevent unwanted deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fine metal mask is used during deposition of electrode material, then patterning accuracy is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent introduces a nucleation-inhibiting coating as an intermediary layer between the substrate and the electrode material. This coating prevents direct nucleation of electrode material on the substrate in unwanted areas, enabling pattern formation without requiring a fine metal mask. The intermediary layer simplifies the manufacturing process while maintaining patterning accuracy.
Solution Approach 2:
The nucleation-inhibiting coating is deposited beforehand on the substrate before the electrode material deposition. This preliminary action pre-defines the areas where electrode material can or cannot deposit, eliminating the need for complex mask alignment and deposition processes during the actual electrode formation.
2Manufacturing precision
If laser drilling is used to remove unwanted electrode material, then patterning is achieved, but manufacturing yield decreases due to debris generation
Solution Approach 1:
Instead of depositing electrode material everywhere and then removing unwanted portions (which generates debris), the patent extracts the nucleation-inhibiting function to a separate coating layer. This prevents unwanted material formation from the start, eliminating the need for removal processes and associated debris generation, thereby improving manufacturing yield.
Solution Approach 2:
The nucleation-inhibiting coating performs a preliminary anti-action by preventing electrode material nucleation in unwanted areas before deposition begins. This preemptive measure avoids the need for subsequent removal operations that would generate harmful debris and reduce manufacturing yield.
3Ease of manufacture
If conventional deposition methods are used without nucleation inhibition, then deposition process is simple, but patterning precision is insufficient
Solution Approach 1:
The nucleation-inhibiting coating serves as a simple intermediary layer that can be deposited using standard vacuum deposition techniques. It provides the necessary patterning precision by controlling where electrode material nucleates, while maintaining ease of manufacture by integrating seamlessly into existing deposition processes without requiring complex equipment or procedures.
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
This approach enhances patterning accuracy and reduces debris, improving manufacturing yield and adaptability to various device topographies by controlling the deposition of conductive materials effectively.
Implementation Method 1
a patterning coating, which may act as and/or be a nucleation-inhibiting coating (NIC)
Implementation Method 2
Various layers and coatings of such panels are typically formed by vacuum-based deposition techniques
Data Source
AI summary
A semiconductor device having a plurality of layers deposited on a substrate and extending in a first portion and a second portion of at least one lateral aspect defined by a lateral axis thereof, comprises an orientation layer comprising an orientation material, disposed on a first exposed layer surface of the device in at least the first portion; at least one patterning layer comprising a patterning material, disposed on a first exposed layer surface of the orientation layer; and at least one deposited layer comprising a deposited material, disposed on a second exposed layer surface of the device in the second portion; wherein the first portion is substantially devoid of a closed coating of the deposited material.