Silica-Based Insulation Layer for Low Dielectric Constant and High Modulus
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Solution Overview
Problem
The increasing integration and speed of semiconductor memory cells require insulation layers with low dielectric constants and high mechanical hardness to mitigate RC delay and cross-talk issues, but existing materials fail to simultaneously achieve these properties effectively.
Innovation Solution
A silica-based insulation layer is formed using an organosilane-based condensation polymerization product, prepared from specific compound mixtures, including porogen-containing linking groups, thermal acid generators, and pore-forming agents, which are coated and cured under controlled conditions to achieve a low dielectric constant and high modulus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional insulation layer materials are used, then the dielectric constant is reduced, but the mechanical hardness is insufficient
Solution Approach 1:
The patent employs composite materials by combining organosilane compounds with specific porogen-containing linking groups with traditional silica-based materials. This creates a hybrid insulation layer that achieves both low dielectric constant (1.9-3.5) and high mechanical hardness through the synergistic properties of the composite structure, where the porogen-containing groups provide low-k characteristics while the silica matrix provides mechanical strength
Solution Approach 2:
The patent utilizes porous materials by incorporating porogen-containing linking groups that create controlled pore structures within the insulation layer. These pores reduce the dielectric constant by displacing high-k material with low-k air/vacuum spaces, while the porous silica matrix maintains structural integrity and mechanical hardness through its three-dimensional network structure
2Strength
If the insulation layer density is increased to improve mechanical properties, then the dielectric constant increases
Solution Approach 1:
The patent applies local quality by creating non-uniform distribution of porogen-containing linking groups within the insulation layer structure. The porogens are strategically positioned to create localized low-k regions that reduce overall dielectric constant, while the surrounding silica matrix maintains high density and mechanical hardness. This local differentiation allows simultaneous optimization of both electrical and mechanical properties
3Quantity of substance
If porogen-containing compounds are added to reduce dielectric constant, then the structural stability may be compromised
Solution Approach 1:
The patent applies parameter changes by carefully controlling the molecular weight, concentration, and chemical structure parameters of the porogen-containing linking groups. By optimizing these parameters, the porogens reduce dielectric constant effectively while their controlled size and chemical stability ensure they do not compromise the overall structural stability of the insulation layer during fabrication and operation
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 silica-based insulation layer exhibits a dielectric constant of 1.9 to 3.5 and a modulus of 3 GPa to 12 GPa, providing excellent mechanical characteristics while maintaining a low dielectric constant, thus addressing the challenges of high integration in semiconductor technology.
Implementation Method 1
an organosilane-based condensation polymerization product, the organosilane-based condensation polymerization product being prepared from a compound mixture
Implementation Method 2
The composition may further include a thermal acid generator
Implementation Method 3
X is a porogen-containing linking group
Data Source
AI summary
A composition for forming a silica-based insulation layer, a silica-based insulation layer, and a method of manufacturing the silica-based insulation layer, the composition including a solvent; and an organosilane-based condensation polymerization product, the organosilane-based condensation polymerization product being prepared from a compound mixture, the compound mixture including compounds represented by the following Chemical Formulae 1 and 2:(R1)3SiXSi(R1)3 [Chemical Formula 1]R2e(Si)OR34-e. [Chemical Formula 2]