Cobalt Titanium Oxide Dielectric Films Atomic Layer Deposition
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Solution Overview
Problem
The semiconductor industry faces challenges in scaling down dielectric layers in devices like capacitors and transistors due to the limitations of silicon dioxide, which results in increased equivalent oxide thickness and leakage current issues, necessitating the use of alternative materials with higher dielectric constants while maintaining a high-quality interface with silicon substrates.
Innovation Solution
The use of cobalt titanium oxide films, formed through atomic layer deposition, as dielectric layers in electronic devices, offering a higher dielectric constant and reduced equivalent oxide thickness, and providing an amorphous structure to minimize leakage current, with the ability to be engineered for specific electrical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicon dioxide is used as dielectric layer, then thermodynamic stability and interface quality are improved, but equivalent oxide thickness increases and leakage current worsens
Solution Approach 1:
The patent employs composite dielectric structures combining silicon dioxide with high-k materials (such as barium strontium titanate, lead zirconate titanate, or tungsten oxide) in layered configurations. This composite approach maintains the thermal stability and interface quality of SiO2 while introducing high-k materials that reduce equivalent oxide thickness and leakage current through their superior dielectric properties
Solution Approach 2:
The patent modifies dielectric layer parameters by controlling thickness, composition ratios, and crystalline structure of high-k materials. By adjusting these parameters, the dielectric constant is enhanced while maintaining interface quality and reducing leakage current, achieving optimal balance between stability and electrical performance
2Length of moving object
If dielectric layer thickness is reduced, then device scaling is improved, but equivalent oxide thickness increases and electrical performance worsens
Solution Approach 1:
The patent uses composite structures with high-k materials that provide higher dielectric constants, enabling physically thinner dielectric layers to achieve the same or better electrical performance. The high-k layer compensates for reduced thickness by providing superior capacitance and lower leakage, maintaining electrical performance while enabling device scaling
Solution Approach 2:
The patent applies different material compositions to different regions of the dielectric structure. High-k materials are strategically positioned in specific layers or regions where they provide maximum benefit for reducing equivalent oxide thickness, while silicon dioxide maintains interface regions for stability, creating locally optimized electrical performance
3Object-affected harmful factors
If alternative dielectric materials are used, then equivalent oxide thickness is reduced, but interface quality with silicon substrate may worsen
Solution Approach 1:
The patent uses silicon dioxide as an intermediary layer between the silicon substrate and high-k dielectric materials. This SiO2 interface layer provides thermal stability and good interface quality, while the overlying high-k material reduces equivalent oxide thickness. The intermediary structure allows benefits of both materials to be realized without direct contact between high-k material and silicon substrate
Solution Approach 2:
The patent creates composite dielectric structures where high-k materials are combined with silicon dioxide in controlled layering. This composite approach maintains the interface quality provided by SiO2 at the silicon interface while introducing high-k materials above to reduce equivalent oxide thickness, achieving both goals simultaneously through material composition
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
Cobalt titanium oxide films enable thinner equivalent oxide thickness, increased capacitance, and reduced leakage current, facilitating the development of smaller, higher-density electronic devices with improved electrical performance.
Implementation Method 1
forming a cobalt titanium oxide film by atomic layer deposition
Data Source
AI summary
Electronic apparatus and methods of forming the electronic apparatus include a cobalt titanium oxide film on a substrate for use in a variety of electronic systems. The cobalt titanium oxide film may be structured as one or more monolayers. The cobalt titanium oxide film may be formed by atomic layer deposition.