Semiconductor Pretreatment Composition for Low-Sublimate Etch Masking
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Solution Overview
Problem
Existing compositions for forming protective films in semiconductor production do not adequately resist wet etching solutions while minimizing sublimate generation, leading to contamination issues during the semiconductor manufacturing process.
Innovation Solution
A composition for pretreatment is applied to a semiconductor substrate, containing specific compounds such as those with aromatic rings and hydroxy groups, organic reducing agents, and chelating agents, before forming a protective film. This composition enhances the protective film's resistance to wet etching solutions while reducing sublimate generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective film is formed using conventional compositions, then the masking function against wet etching solution is insufficient, but increasing the protective film thickness or using stronger materials increases sublimate generation
Solution Approach 1:
The patent applies a pretreatment composition containing aromatic hydroxy compounds, organic reducing agents, and chelating agents to the substrate before forming the protective film. This preliminary action modifies the substrate surface to enhance subsequent protective film formation, achieving excellent wet etching resistance without requiring excessive protective film thickness that would cause sublimate issues
Solution Approach 2:
The patent uses a composite formulation combining multiple functional components: aromatic hydroxy compounds (for adhesion and film formation), organic reducing agents (for surface modification), and chelating agents (for metal ion control). This composite approach creates a protective film with optimized performance that provides sufficient masking function while controlling sublimate generation
2Object-generated harmful factors
If the protective film is made thinner to reduce sublimate, then the masking function against wet etching solution deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the pretreatment layer, specifically incorporating aromatic hydroxy compounds with specific molecular structures, organic reducing agents, and chelating agents in optimized concentrations. These parameter changes enable the formation of a thin protective film that maintains excellent masking function while reducing sublimate generation
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 proposed solution effectively forms a protective film with excellent resistance to wet etching solutions for semiconductors, while significantly reducing sublimate generation, thus preventing contamination and improving the semiconductor manufacturing process.
Implementation Method 1
an organic reducing agent
Implementation Method 2
a chelating agent
Implementation Method 3
a compound having an aromatic ring and an aromatic hydroxy group
Data Source
AI summary
A composition for pretreatment to be applied on a semiconductor substrate before a protective film is formed on the semiconductor substrate using a composition for forming a protective film, the composition for pretreatment including: at least one compound (A) selected from a compound having an aromatic ring and an aromatic hydroxy group, an organic reducing agent, and a chelating agent; and a solvent (B).