Polyimide Precursor Composition for High Cyclization Rate and Storage Stability
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Solution Overview
Problem
Polyimide precursors with high cyclization rates suffer from stability issues during long-term storage, leading to unfavorable cyclization and deterioration in properties.
Innovation Solution
A polyimide precursor composition with a specific structural isomer ratio of 60% to 90% and the inclusion of a polymerizable group, combined with a photosensitive resin composition and thermal base generators, to enhance cyclization rate and storage stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cyclization rate of the polyimide precursor is increased, then the productivity is improved, but the stability of the composition during storage deteriorates
Solution Approach 1:
The invention changes the structural parameters of the polyimide precursor by controlling the molar ratio of specific repeating units (Formula 1-2) to be 60-90% among structural isomers. This parameter optimization enables the precursor to achieve high cyclization rate while maintaining storage stability, resolving the contradiction between productivity and stability
Solution Approach 2:
The invention creates a composite photosensitive resin composition containing the specifically structured polyimide precursor along with other components. This composite formulation synergistically enhances both the cyclization rate and storage stability, allowing the system to achieve high productivity without sacrificing composition stability during storage
2Productivity
If the polyimide precursor undergoes cyclization during storage, then the productivity is improved, but the harmful effects increase due to unfavorable cyclization and property deterioration
Solution Approach 1:
The invention applies preliminary anti-action by designing a polyimide precursor with specific structural characteristics (controlling the ratio of repeating units of Formula 1-2 to 60-90% among structural isomers) that inherently resists unfavorable cyclization during storage. This preliminary structural design prevents the harmful effects before they can occur, while still enabling high cyclization rate when needed for productivity
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 maintains high cyclization rates while ensuring long-term storage stability, improving the characteristics of the cured film and semiconductor devices.
Implementation Method 1
the polyimide precursor is then heated to result in cyclization of the polyimide precursor, thereby forming a cured film
Implementation Method 2
a photosensitive resin composition using the polyimide precursor composition
Data Source
AI summary
A photosensitive resin composition using a polyimide precursor composition, a cured film, a method for producing a cured film, a semiconductor device, and a method for producing a polyimide precursor composition are provided. In the polyimide precursor composition, the molar ratio of repeating units represented by General Formula (1-2) among structural isomers of the polyimide precursor is 60% to 90% by mole. In General Formula (1-2), A1 and A2 each independently represents an oxygen atom or NH, R111 and R112 each independently represents a single bond or a divalent organic group, and R113 and R114 each independently represents a hydrogen atom or a monovalent organic group.