Polysilane-Polysiloxane Resin Composition for Uniform Semiconductor Films

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Solution Overview

Problem

Existing silicon-containing films used in semiconductor processing exhibit significant in-plane thickness distribution, compromising their uniformity and requiring further improvement for effective substrate protection during fine processing.

Innovation Solution

A resin composition incorporating a silicon-containing resin component and a specific solvent, such as a terpene compound with hydroxy or acetoxy groups, is developed to enhance in-plane uniformity, comprising polysilane-polysiloxane resins and their respective production methods.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a coating-type composition is used to form a silicon-containing film, then the film can be easily wet etched with a stripping liquid, but the film exhibits large in-plane thickness distribution

Engineering Contradiction:
Improveease of wet etchingVSAvoidin-plane thickness uniformity
Core Design Contradiction:
Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent changes the chemical parameters of the composition by incorporating specific silicon compounds (such as silicon oxides, silicon nitrides, silicon carboxylates) and organic compounds with carboxylic acid groups. This chemical parameter modification enables the film to be easily wet etched while maintaining excellent in-plane thickness uniformity, resolving the contradiction between ease of manufacture and manufacturing precision.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent uses composite materials by combining silicon-containing compounds (silicon oxides, silicon nitrides, silicon carboxylates) with organic compounds having carboxylic acid groups. This composite approach creates a film that possesses both the desired etchability and the required thickness uniformity, simultaneously achieving ease of manufacture and manufacturing precision.

Inventive Principle:
Principle #40Composite materials

2Object-affected harmful factors

If a silicon-containing film is used to protect substrates during fine processing, then substrate protection is provided, but the film requires improvement in in-plane uniformity

Engineering Contradiction:
Improvesubstrate protectionVSAvoidin-plane thickness uniformity
Core Design Contradiction:
Object-affected harmful factorsVSManufacturing precision

Solution Approach 1:

The patent modifies the chemical composition parameters by incorporating specific silicon compounds and organic compounds with carboxylic acid groups. This parameter change results in a film with excellent in-plane thickness uniformity that maintains its protective function during fine processing, resolving the contradiction between substrate protection and manufacturing precision.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent employs a composition that forms a removable protective film. The film serves its protective function temporarily during fine processing and then can be easily removed by wet etching with a stripping liquid. This disposable approach provides effective substrate protection while achieving the required thickness uniformity.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

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 resin composition achieves excellent in-plane uniformity in film formation, improving substrate protection and processing outcomes by reducing thickness distribution and enhancing alkali developability.

Implementation Method 1

the solvent comprises at least one solvent selected from the group consisting of a terpene compound having at least one group selected from the group consisting of a hydroxy group and an acetoxy group, and a cyclic skeleton-containing acetate compound

Methodology Applied
Scientific EffectSolvation: Solvation

Implementation Method 2

performing a hydrolysis and condensation reaction of at least one silicon compound selected from the group consisting of silicon compounds represented by the general formulas (A-1-1) to (A-1-4)

Methodology Applied
Scientific EffectHydrolysis: Hydrolysis

Data Source

PatentUS11718717B2Resin composition, method for producing resin composition, film formation method, and cured product
Publication Date: 2023.08.08 TOKYO OHKA KOGYO CO LTD
  • US11718717B2 patent drawing
  • US11718717B2 patent drawing
  • US11718717B2 patent drawing

AI summary

A resin composition including a silicon-containing resin component and a solvent, the silicon-containing resin component includes (I) mentioned below, the solvent including at least one of a terpene compound having at least one of a hydroxy group and an acetoxy group, and a cyclic skeleton-containing acetate compound (excluding the terpene compound):(I) a polysilane-polysiloxane resin having a polysilane structure and a polysiloxane structure.