Resist Underlayer Composition Adhesion to Substrate
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Solution Overview
Problem
Conventional polyarylene SOC materials exhibit limited adhesion to inorganic substrates, leading to delamination during wet chemical etch processes, which results in loss of pattern fidelity and substrate damage in semiconductor manufacturing.
Innovation Solution
A resist underlayer composition comprising a polyarylene ether and a polar additive polymer with functional groups such as hydroxy, thiol, or amino is used, enhancing substrate adhesion through improved substrate interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polyarylene SOC materials are used, then thermal stability and etch resistance are improved, but adhesion to inorganic substrates deteriorates
Solution Approach 1:
The patent combines polyarylene SOC material with a separate adhesion promoter layer containing silane-based compounds. This composite structure allows the polyarylene to provide thermal stability and etch resistance while the silane-based adhesion promoter provides strong bonding to inorganic substrates through silane coupling agents that form chemical bonds with both the substrate and the polyarylene layer.
2Reliability
If conventional polyarylene SOC materials are used, then high etch resistance is achieved, but delamination during wet chemical etch occurs
Solution Approach 1:
The patent introduces an adhesion promoter layer as an intermediary between the polyarylene SOC material and the inorganic substrate. This intermediate layer, containing silane-based compounds, prevents delamination during wet chemical etch by providing strong chemical bonding to both the substrate and the polyarylene, acting as a buffer that maintains interface integrity during aggressive chemical processing.
3Temperature
If conventional polyarylene formulations are used, then thermal stability is maintained, but pattern fidelity is lost due to delamination
Solution Approach 1:
The patent creates a composite structure where the polyarylene layer maintains thermal stability while the integrated adhesion promoter layer prevents delamination. This composite approach ensures that during high-temperature processing steps, the pattern structure remains intact and adherent to the substrate, preserving manufacturing precision and pattern fidelity throughout the fabrication process.
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 composition provides enhanced adhesion to substrates, preventing delamination during wet chemical etch processes and maintaining pattern fidelity, while also offering thermal stability and planarization properties.
Implementation Method 1
an additive polymer that is different from the polyarylene ether. The additive polymer includes an aromatic or heteroaromatic group having at least one protected or free functional group selected from hydroxy, thiol, and amino
Implementation Method 2
The additive polymer includes an aromatic or heteroaromatic group having at least one protected or free functional group selected from hydroxy, thiol, and amino
Implementation Method 3
a layer of the resist underlayer composition is applied over a substrate
Implementation Method 4
The applied resist underlayer composition is subsequently cured to form a resist underlayer
Implementation Method 5
The applied resist underlayer composition is subsequently cured to form a resist underlayer
Data Source
AI summary
A resist underlayer composition including a polyarylene ether, an additive polymer that is different from the polyarylene ether, and a solvent, wherein the additive polymer includes an aromatic or heteroaromatic group having at least one protected or free functional group selected from hydroxy, thiol, and amino.