Plasma-Treated Oxide Interfaces for Scalable Conductivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for forming conductive oxide interfaces, such as atomic layer deposition, result in low carrier density and limited conductivity, hindering their practical applications in electronics.
Innovation Solution
A process involving plasma treatment of a first oxide surface with a reducing gas, like ammonia, followed by deposition of a second oxide, to create a conductive oxide interface with enhanced conductivity and controllable carrier density, using techniques like atomic layer deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If atomic layer deposition is used to form conductive oxide interfaces, then the process is compatible with mass production and scalable, but the carrier density is low and conductivity is limited
Solution Approach 1:
The patent applies preliminary plasma treatment to the first oxide substrate before depositing the second oxide layer. This pre-treatment modifies the substrate surface to enhance conductivity at the interface, allowing the subsequent ALD process to produce interfaces with both high scalability and improved carrier density exceeding 10^13 per cm²
Solution Approach 2:
The patent changes the physical and chemical parameters of the first oxide surface through plasma exposure, creating oxygen vacancies and modifying surface states. This parameter change enables the interface to achieve high conductivity while maintaining the scalability benefits of ALD processing
2Reliability
If epitaxial growth is used to fabricate conductive oxide interfaces, then high conductivity can be achieved, but the process is slow and costly with limited scalability
Solution Approach 1:
The patent replaces the complex epitaxial growth mechanism with a simpler physical vapor deposition process (ALD) enhanced by plasma treatment. This substitution maintains high conductivity through plasma-induced surface modifications while achieving the scalability and cost-effectiveness of ALD, eliminating the need for slow epitaxial processes
3Reliability
If plasma treatment with reducing gas is applied to increase carrier density, then conductivity is enhanced, but the process complexity increases
Solution Approach 1:
The patent merges the plasma treatment step with the existing ALD process workflow, using the same reducing gas (ammonia) that can be utilized in both the plasma activation phase and the subsequent ALD deposition phase. This integration enhances conductivity while minimizing additional process complexity by combining functions into a unified process sequence
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 process significantly reduces sheet resistance and increases carrier density, enabling high conductivity and scalability, suitable for applications in memory storage and logic operations.
Implementation Method 1
contacting a surface of a first oxide with a plasma of a reducing gas
Implementation Method 2
plasma of a reducing gas
Implementation Method 3
depositing a second oxide on the treated surface, thereby obtaining a conductive oxide interface
Data Source
AI summary
A process of preparing a conductive oxide interface is described herein, comprising contacting a surface of a first oxide with a plasma of a reducing gas to obtain a treated surface, and depositing a second oxide on the treated surface, thereby obtaining a conductive oxide interface between the first oxide and the second oxide. Further described herein are composites and articles of manufacture comprising same, the composites comprising a first oxide and second oxide, and an interface between the first oxide and second oxide which comprises a conductive oxide interface, wherein the conductive oxide interface comprises nitrogen atoms and/or the second oxide is in an amorphous form and the conductive oxide interface is characterized by a sheet resistance of no more than 105 omega/square.