A method for inhibiting oxygen diffusion and performance failure at the interface of a functional oxide thin film and a metal capping layer

By preparing functional oxide thin films on single-crystal substrates, selecting appropriate metal capping layer materials, and controlling the preparation temperature, the oxygen diffusion problem between functional oxide thin films and metal capping layers was solved, achieving structural stability and retention of electronic properties under high-temperature conditions.

CN117558617BActive Publication Date: 2026-06-09SHENZHEN UNIV

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHENZHEN UNIV
Filing Date
2023-11-13
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

The oxygen diffusion interaction between functional oxide films and metal capping layers leads to a decrease in the conductivity of the metal capping layer and affects the electronic properties of the functional oxide films. Existing technologies have failed to effectively solve this problem.

Method used

Functional oxide thin films are prepared on single-crystal substrates. By selecting appropriate metal capping layer materials and controlling their preparation temperature, oxygen migration at the interface between the oxide film and the metal capping layer is restricted, ensuring that the film structure does not change and the electronic properties are preserved at high temperatures.

Benefits of technology

It effectively suppresses oxygen diffusion at the interface between the functional oxide film and the metal capping layer, ensuring the structural stability and retention of electronic properties of the film under high temperature conditions, and avoiding the failure of metal oxide electronic functional devices.

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Abstract

The application discloses a method for inhibiting oxygen diffusion and performance failure of a functional oxide film and a metal covering layer, and relates to the field of material technology applications. The method comprises the following steps: (1) preparing a functional oxide film on a single crystal substrate by using a pulse laser to obtain a single crystal substrate / functional oxide film heterojunction; and (2) preparing a metal covering layer on the functional oxide film surface of the single crystal substrate / functional oxide film heterojunction, wherein the temperature for preparing the metal covering layer is less than 700 DEG C, so as to obtain a single crystal substrate / functional oxide film / metal covering layer heterojunction. The material and the preparation process of the metal covering layer are optimized, so that the oxygen diffusion between the functional oxide film and the metal covering layer is inhibited, and the phase change of the structure and the deterioration of the electronic characteristics are prevented.
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