Norbornene Derivative Resin Adhesion Flexibility
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Solution Overview
Problem
Resist materials for electronic applications require both optical and mechanical characteristics, such as adhesion to substrates, but existing materials lack the necessary functionality and flexibility for advanced micromachining processes, particularly in semiconductor manufacturing.
Innovation Solution
A norbornene derivative with epoxy and methylene-mediated reactive groups is developed, produced through a Diels-Alder reaction, reduction, esterification, and epoxidation steps, providing a bifunctional monomer with enhanced optical characteristics and flexibility for improved adhesion and cross-linking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional resist materials are used, then basic optical and mechanical characteristics are provided, but adhesion to substrate and flexibility for advanced micromachining are insufficient
Solution Approach 1:
The patent creates a composite resin composition by combining the norbornene derivative (providing adhesion and flexibility) with other polymerizable monomers (providing optical properties and mechanical strength). This composite approach allows the material to simultaneously achieve high substrate adhesion, flexibility for micromachining, and necessary optical characteristics for resist applications.
Solution Approach 2:
The norbornene derivative introduces specific functional groups (epoxy and methylene-mediated reactive groups) that change the chemical parameters of the resin system, enabling enhanced adhesion to substrates and improved flexibility. These parameter changes in molecular structure directly translate to better performance in adhesion and micromachining flexibility.
2Adaptability or versatility
If existing monomers are used, then basic polymerization is achieved, but optical characteristics and flexibility for special functional applications are insufficient
Solution Approach 1:
The synthesis process is divided into distinct sequential steps: Diels-Alder reaction to form the norbornene core, reduction step to create the methylol group, esterification to introduce the methacryloyl group, and epoxidation to form the epoxy group. This segmentation allows each step to be optimized independently while building the complex bifunctional monomer with specific optical and flexible properties.
Solution Approach 2:
The norbornene derivative serves multiple functions simultaneously: it provides optical characteristics for photolithography, flexibility for micromachining, and adhesion to substrates. By incorporating this multi-functional monomer into the resin system, the patent eliminates the need for separate additives for each function, simplifying the overall formulation while achieving enhanced performance.
3Adaptability or versatility
If simple monomers are used, then manufacturing is easy, but functionality for advanced electronic applications is insufficient
Solution Approach 1:
The methylene group in the norbornene derivative acts as an intermediary element that provides flexibility and enables cross-linking while maintaining compatibility with other polymerizable monomers. This intermediary structure allows the complex molecule to integrate seamlessly into the resin system without causing incompatibility issues, despite its advanced functionality for micromachining.
Solution Approach 2:
The norbornene derivative is pre-synthesized with its reactive groups (epoxy and methylene-mediated) already in place before being incorporated into the resin system. This preliminary preparation of the functional groups allows the material to immediately provide enhanced adhesion and flexibility when used in advanced electronic applications, without requiring additional modification steps.
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 norbornene derivative offers excellent optical properties and flexibility, enabling the formation of rigid polymers with high substrate adhesion, suitable for advanced micromachining applications as a special functional material in resist materials, optical materials, and coating materials.
Implementation Method 1
a Diels-Alder reaction step of reacting cyclopentadiene with a compound of formula (A) to obtain a norbornene derivative (B)
Implementation Method 2
b) a reduction step of reducing the norbornene derivative (B) to obtain a norbornene-methylol derivative (C)
Implementation Method 3
d) an epoxidation step of oxidizing the unsaturated bond of the norbornene skeleton of the norbornene-methylol derivative (C)
Data Source
AI summary
A novel compound useful as a raw material for a resist material is described. A norbornene derivative having epoxy and a methylene-mediated reactive group in a norbornane skeleton is represented by the following formula.In the formula, R1 represents a hydrogen atom, acryloyl, methacryloyl or hydroxymethylacryloyl, and R2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.