Silica Layer Composition for Etch Resistance and Gap-Fill
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Solution Overview
Problem
Existing silica layer formation technologies face challenges in achieving simultaneous excellence in etch resistance, gap-fill characteristics, and planarization, often requiring trade-offs between these properties.
Innovation Solution
A composition comprising a silicon-containing polymer with specific 1H-NMR spectrum characteristics and a solvent, which includes polysilazane or polysiloxazane, is used to form a silica layer, optimizing the polymer's molecular weight and structural features to enhance etch resistance, gap-fill capabilities, and film flatness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional silica layer formation technologies are used, then one of etch resistance, gap-fill characteristics, or planarization can be achieved, but the other properties deteriorate due to required trade-offs
Solution Approach 1:
The patent changes the chemical composition parameters of the silicon-containing polymer by controlling the molar ratios of specific silicon compounds (Equations 1 and 2), which simultaneously improves etch resistance and gap-fill characteristics without requiring trade-offs between these properties
Solution Approach 2:
The patent uses a composite silicon-containing polymer formed by reacting multiple silicon compounds (tetraethyl orthosilicate, triethyl silane, dimethyl dichlorosilane, diethyl dichlorosilane) in specific molar ratios, creating a material with combined properties that achieve both high etch resistance and excellent gap-fill characteristics
2Reliability
If conventional silica layer formation technologies are used, then etch resistance can be improved, but planarization deteriorates
Solution Approach 1:
The patent optimizes the molecular weight parameters of the silicon-containing polymer (number average molecular weight Mn: 1,000-10,000; weight average molecular weight Mw: 10,000-100,000) to simultaneously achieve high etch resistance and excellent planarization, eliminating the need for trade-offs between these properties
3Reliability
If the silicon-containing polymer has high molecular weight for improved etch resistance, then gap-fill characteristics and planarization deteriorate
Solution Approach 1:
The patent precisely controls the molecular weight parameters of the silicon-containing polymer, setting the number average molecular weight Mn between 1,000-10,000 and weight average molecular weight Mw between 10,000-100,000, which optimizes both etch resistance and film flatness simultaneously without requiring trade-offs
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 solution achieves improved etch resistance, gap-fill characteristics, and planarization, resulting in a silica layer with enhanced denseness and uniformity, facilitating subsequent processing and ensuring a rigid, uniform insulation layer.
Implementation Method 1
a composition for forming a silica layer, the composition including a silicon-containing polymer
Implementation Method 2
silica layer manufactured using the composition
Data Source
AI summary
A composition for forming a silica layer, a silica layer, and an electronic device, the composition including a silicon-containing polymer; and a solvent, wherein a 1H-NMR spectrum of the silicon-containing polymer satisfies Equations 1 and 2:B/A=0.2 to 0.4 [Equation 1](A+B)/C=4.8 to 12.0. [Equation 2]