Organometallic Protective Layer for Organic Semiconductor Heat Resistance
Solution Overview
Problem
In the patterning of organic layers by photolithography, the low heat resistance of organic semiconductor layers limits the application of sufficient heat, hindering the improvement of heat resistance during processing.
Innovation Solution
An organometallic compound represented by General Formula (G1) is used to form a protective layer over the organic semiconductor layer, enhancing its heat resistance. This compound, with a specific structure, improves the thermal stability of the organic semiconductor layer, allowing for higher temperature processing without damaging the layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If sufficient heat is applied to improve film properties, then the film quality is improved, but the organic semiconductor layer is damaged due to low heat resistance
Solution Approach 1:
A protective layer comprising an organometallic compound is introduced as an intermediary between the organic semiconductor layer and the external environment. This protective layer has high heat resistance and allows sufficient heat application during processing without damaging the underlying organic semiconductor layer, thereby enabling improved film quality while protecting against heat damage.
2Manufacturing precision
If photolithography method is used for patterning, then high resolution is achieved, but heat resistance during processing deteriorates
Solution Approach 1:
The protective layer comprising the organometallic compound is formed in advance before the photolithography process. This preliminary action ensures that when heat is applied during photolithography for high-resolution patterning, the organic semiconductor layer is already protected, thus enabling both high manufacturing precision and adequate heat resistance during processing.
3Stability of the object's composition
If heat treatment is applied to reduce in-plane variation, then film uniformity is improved, but the organic layer suffers from insufficient heat resistance
Solution Approach 1:
The protective layer comprising the organometallic compound is formed beforehand to cushion and absorb the thermal stress during heat treatment. This allows sufficient heat to be applied to reduce in-plane variation and improve film uniformity, while the protective layer prevents damage to the organic semiconductor layer, thus achieving both improved uniformity and maintained reliability.
Data Source
AI summary
The heat resistance of an organic semiconductor device including a step of forming an aluminum oxide film over and in contact with an organic semiconductor layer is improved. A heating step is performed after a layer containing an organometallic compound for a mask for an organic semiconductor layer, which is represented by General Formula (G1) below, is provided over the organic semiconductor layer.In General Formula (G1), Ar represents a substituted or unsubstituted aryl group having 6 to 30 carbon atoms or a substituted or unsubstituted heteroaryl group having 1 to 30 carbon atoms, X represents oxygen or sulfur, M represents a metal, n represents an integer greater than or equal to 1 and less than or equal to 5, and n is the same as the valence of the metal M. Note that when n is greater than or equal to 2, a plurality of Ars may be the same or different and Xs may be the same or different. When Ar represents the substituted or unsubstituted heteroaryl group having 1 to 30 carbon atoms, a heteroatom of the heteroaryl group may be coordinated to the metal M.