Dielectric Device Metal Oxide Island Adhesion
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Solution Overview
Problem
Existing dielectric devices with oxide dielectric layers on metal substrates face challenges in achieving strong adhesion while maintaining favorable leakage characteristics, as methods like forming a rough surface on the metal foil complicate the process and risk deteriorating the leakage characteristics.
Innovation Solution
A dielectric device with a metal oxide region distributed like islands on the substrate surface enhances adhesion between the substrate and oxide dielectric layer, formed by oxidizing the metal substrate, which improves durability and maintains smooth surfaces to prevent leakage issues, along with a manufacturing method that includes heat-treating the multilayer body in air and vacuum to form these regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rough surface is formed on the metal foil to enhance adhesion, then the adhesion between substrate and oxide dielectric layer is improved, but the leakage characteristics are deteriorated and the manufacturing process becomes complicated
Solution Approach 1:
The invention applies local oxidation to create metal oxide regions at specific locations on the substrate surface rather than uniformly roughening the entire surface. These localized metal oxide regions provide adhesion enhancement only where needed, while the majority of the surface remains smooth to maintain favorable leakage characteristics.
Solution Approach 2:
The invention changes the chemical composition parameter of the substrate surface by forming metal oxide regions through oxidation. This chemical transformation creates regions with different properties (metal oxide vs. metal) that provide enhanced adhesion without requiring physical roughening of the entire surface.
2Strength
If a rough surface is formed on the metal foil to enhance adhesion, then the adhesion between substrate and oxide dielectric layer is improved, but the manufacturing process becomes complicated
Solution Approach 1:
The invention changes the chemical composition parameter of the substrate surface by forming metal oxide regions through oxidation. This chemical transformation creates regions with different properties (metal oxide vs. metal) that provide enhanced adhesion without requiring physical roughening of the entire surface.
Solution Approach 2:
The invention replaces the mechanical approach of surface roughening with a chemical approach of selective oxidation. Instead of mechanically creating rough surfaces to enhance adhesion, the invention uses chemical oxidation to form metal oxide regions that provide adhesion enhancement through chemical bonding mechanisms.
3Strength
If the area of metal oxide region is increased to enhance adhesion, then the adhesion strength is improved, but the capacitance density decreases
Solution Approach 1:
The invention applies local oxidation to create metal oxide regions at specific locations on the substrate surface rather than uniformly roughening the entire surface. These localized metal oxide regions provide adhesion enhancement only where needed, while the majority of the surface remains smooth to maintain favorable leakage characteristics.
Solution Approach 2:
The invention uses partial oxidation rather than complete surface oxidation. By forming metal oxide regions only in specific areas (island-like distribution) rather than covering the entire surface, the invention achieves sufficient adhesion enhancement while minimizing the impact on capacitance density.
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 solution achieves enhanced adhesion and maintains favorable leakage characteristics, improving the durability and performance of the dielectric device by forming metal oxide regions on the substrate surface, which are formed after the oxide dielectric layer is mounted, simplifying the manufacturing process and avoiding the complications of rough surfaces.
Implementation Method 1
the metal oxide region is formed by oxidizing the metal constituting the substrate
Implementation Method 2
a first step of heat-treating the multilayer body in the air and a second step of heat-treating the multilayer body in a vacuum atmosphere after the first step
Data Source
AI summary
A dielectric device comprises a substrate made of a metal and an oxide dielectric layer mounted on a surface of the substrate. The surface of the substrate has metal oxide regions distributed like islands, while the oxide dielectric layer is in close contact with the substrate through the metal oxide regions. Since adhesion is higher in an area where the substrate and the oxide dielectric layer are in close contact with each other through the metal oxide regions distributed like islands on the surface of the substrate, the adhesion between the substrate and oxide dielectric layer in the dielectric device is enhanced. As compared with a case where a rough surface is formed on a metal foil, the metal oxide region and the substrate are inhibited from forming a rough surface, whereby leakage characteristics can be kept from being deteriorated by the rough surface.