Pyrenol-Based Aromatic Resin Underlayers for Plasma Etch Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current underlayer materials for semiconductor manufacturing lack improved etch resistance, particularly to O2 and CF4 plasmas, and do not provide desired antireflective and planarizing properties in multilayer resist processes.
Innovation Solution
Aromatic resin reaction products are formed by reacting pyrenol compounds with aromatic aldehydes having fused aromatic rings, in the presence of an acid catalyst, to create a composition suitable for use as underlayers in semiconductor manufacturing, offering enhanced etch selectivity and gap filling properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional underlayer materials are used, then manufacturing process is simple, but etch resistance to O2 and CF4 plasmas is insufficient
Solution Approach 1:
The patent employs composite materials by combining pyrenol compounds (providing etch resistance) with aromatic aldehydes (providing antireflective and planarizing properties) to create a multifunctional underlayer material that simultaneously achieves improved etch resistance to O2 and CF4 plasmas while maintaining desired antireflective and planarizing characteristics
Solution Approach 2:
The patent modifies the chemical composition parameters of the underlayer material by incorporating specific pyrenol compounds with fused aromatic rings and reacting them with aromatic aldehydes in controlled ratios, thereby tuning the material's etch resistance, antireflective properties, and planarizing capabilities to meet multiple performance requirements
2Reliability
If multilayer resist processes are used to prevent pattern collapse, then pattern stability is improved, but process complexity increases
Solution Approach 1:
The patent applies universality by designing an underlayer material that performs multiple functions simultaneously: it provides etch resistance during plasma etching, offers antireflective properties to prevent standing waves, and delivers planarizing characteristics for surface uniformity, thereby simplifying the overall multilayer resist process while maintaining pattern stability
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 resulting aromatic resin underlayers demonstrate improved etch resistance to O2 and CF4 plasmas, reduced swelling, and excellent planarization and gap filling capabilities, making them suitable for various semiconductor manufacturing processes.
Implementation Method 1
Aromatic resins for underlayers are reaction products of at least one or more pyrenol compounds and at least one aromatic aldehyde having at least 2 fused aromatic rings
Data Source
AI summary
Polymeric reaction products of certain aromatic alcohols with certain aromatic aldehydes are useful as underlayers in semiconductor manufacturing processes.