Triazine Polymer Microlens Solvent Resistance
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Solution Overview
Problem
Conventional microlens materials for solid-state image sensors, such as those used in cameras, face challenges in maintaining high refractive index and solvent resistance, especially when exposed to organic solvents during production.
Innovation Solution
A polymer with a specific structure, featuring an aromatic group linked to a triazine ring through a tert-butoxycarbonyloxy, tert-butoxycarbonylamino, or acetal protecting group, is used to create a high-refractive-index microlens with excellent solvent resistance, employing a non-photosensitive liquid composition and thermal acid generating agents for deprotection and cross-linking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a linear polymer including a triazine ring is used as a microlens material, then the refractive index is improved, but the solvent resistance deteriorates when exposed to organic solvents during production
Solution Approach 1:
The patent introduces protected hydroxy groups (with tert-butoxycarbonyloxy, tert-butoxycarbonylamino, or acetal protecting groups) into the polymer structure. These protective groups modify the chemical parameters of the polymer, enabling it to resist organic solvents while maintaining its high refractive index property. The protected groups can be subsequently removed to reveal the functional hydroxy groups after molding.
Solution Approach 2:
The patent creates a composite polymer structure that combines the triazine ring (providing high refractive index) with protected hydroxy groups (providing solvent resistance). This composite approach allows the material to simultaneously achieve both high refractive index and excellent solvent resistance during the molding process.
2Measurement precision
If the microlens diameter is reduced to increase sensor resolution, then the measurement precision is improved, but the manufacturing difficulty increases due to material requirements
Solution Approach 1:
The protected hydroxy groups in the polymer structure enable the material to withstand organic solvent processing conditions, allowing for precise molding of small-diameter microlenses. The protective groups prevent unwanted chemical reactions during processing, facilitating manufacturing of high-resolution sensor components.
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 polymer achieves a high refractive index and excellent solvent resistance, enabling the production of microlenses with improved optical properties and durability, suitable for use in solid-state image sensors.
Implementation Method 1
a thermal acid generating agent (C) when Ra1 is a hydroxy group protected with an acetal protecting group
Implementation Method 2
A material of the image sensor needs to have a higher refractive index in order to condense light to a photodiode in the image sensor with high efficiency
Implementation Method 3
Ra1 is a hydroxy group protected with a tert-butoxycarbonyloxy group, a tert-butoxycarbonylamino group, or an acetal protecting group
Data Source
AI summary
A polymer having a high refractive index and providing a molded product that has excellent solvent resistance; a triazine compound; a method for producing the triazine compound; a method for producing the polymer using the triazine compound; a non-photosensitive liquid composition including the polymer; a method for producing a molded product using the composition; a molded product of the composition; a film formed from the molded product; a microlens formed from the molded product; and an optical element including the microlens. A polymer including a unit having a specific structure in which an aromatic group having a hydroxy group protected with a tert-butoxycarbonyloxy group, a tert-butoxycarbonylamino group, or an acetal protecting group is linked to a triazine ring through a specific linking group.