SrZrO3 Resistor Layer Fabrication via Sol-Gel Coating
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Solution Overview
Problem
Conventional methods for fabricating resistive non-volatile memory face challenges such as high costs for single crystal structures and inability to form large area uniform composition films, making them unsuitable for mass production.
Innovation Solution
A method involving a substrate with a bottom electrode formed by RF magnetron sputtering of LaNiO3 film, followed by a sol-gel method using a solution with Zr and Sr precursors to create a SrZrO3 resistor layer, and a top electrode, allowing for cost-effective and scalable production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flame fusion or pulse laser sputtering is used to form Cr doped SrTiO3 single crystal or SrZrO3 film, then the resistor layer achieves proper electrical characteristics, but the fabrication cost increases and large area uniform composition cannot be achieved
Solution Approach 1:
The patent replaces expensive single crystal growth methods with a solution-based coating method using inexpensive precursors. The resistor layer is formed by coating a solution containing Sr and Zr precursors, drying, and firing at relatively low temperature (900-1100°C), avoiding costly flame fusion or pulse laser sputtering equipment while achieving uniform large-area films with proper electrical characteristics
Solution Approach 2:
The patent changes the fabrication parameters from high-energy physical vapor deposition or single crystal growth to solution-based chemical deposition followed by low-temperature firing. This parameter change enables cost-effective mass production while maintaining the required electrical properties through controlled solution composition and firing conditions
2Manufacturing precision
If single crystal structure with flame fusion is used, then high quality resistor layer is achieved, but fabrication cost increases significantly
Solution Approach 1:
The patent replaces expensive single crystal growth methods with a solution-based coating method using inexpensive precursors. The resistor layer is formed by coating a solution containing Sr and Zr precursors, drying, and firing at relatively low temperature (900-1100°C), avoiding costly flame fusion or pulse laser sputtering equipment while achieving uniform large-area films with proper electrical characteristics
Solution Approach 2:
The patent uses a composite approach by forming a polycrystalline ceramic structure from solution-derived precursors rather than requiring single crystal growth. The firing process creates a dense, uniform polycrystalline SrZrO3 layer that achieves the required electrical properties without the complexity and cost of single crystal fabrication
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
This approach results in low operating voltage, high-speed operation, long retention time, and improved electrical performance, suitable for mass production while reducing fabrication costs.
Implementation Method 1
a solution with precursors of Zr and Sr is coated on the bottom electrode, drying is performed on the solution on the bottom electrode surface and then fired the dried film to form a resistor layer of SrZrO3
Implementation Method 2
a bottom electrode is formed on the substrate, a solution with precursors of Zr and Sr is coated on the bottom electrode
Data Source
AI summary
A method for non-volatile memory fabrication is provided, in which a substrate is provided, a bottom electrode is formed on the substrate, a solution with precursors of Zr and Sr is coated on the bottom electrode, the solution on the bottom electrode surface is dried and then fired to form a resistor layer of SrZrO3, and a top electrode is formed on the resistor layer.