Solid Electrolyte Membrane Tensioning for Uniform Metal Film Deposition
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Solution Overview
Problem
The existing film formation apparatuses for metal films experience unevenness and degradation in film quality due to thermal expansion of the solid electrolyte membrane, leading to sagging and subsequent uneven metal film deposition.
Innovation Solution
A film formation apparatus with a membrane tensioning mechanism that applies a tensile force from the central portion of the solid electrolyte membrane to its outer edge portion, elongating it and maintaining a flat surface even during thermal expansion, thereby preventing sagging and ensuring uniform metal film deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If heated electrolyte solution is poured into the liquid reservoir to increase film forming speed, then productivity is improved, but the solid electrolyte membrane thermally expands and sags against the substrate surface causing unevenness in the metal film
Solution Approach 1:
The membrane tensioning mechanism applies a tensile force to the solid electrolyte membrane in advance before the membrane sags due to thermal expansion. This preliminary counteracting force prevents the membrane from contacting and sagging against the substrate surface, thereby maintaining film uniformity even when heated electrolyte solution is used to increase forming speed.
2Device complexity
If the solid electrolyte membrane is allowed to contact the substrate directly, then device complexity is reduced, but unevenness occurs on the membrane surface when voltage is applied causing degraded film quality
Solution Approach 1:
The membrane tensioning mechanism acts as an intermediary between the solid electrolyte membrane and the substrate. It applies a controlled tensile force to the membrane, maintaining it in a tensioned state that prevents direct sagging contact with the substrate while allowing the membrane to remain in place for ion conduction.
3Manufacturing precision
If the solid electrolyte membrane is elongated by applying tensile force from central portion toward outer edge portion, then membrane flatness is maintained preventing film unevenness, but device complexity increases due to membrane tensioning mechanism
Solution Approach 1:
The membrane tensioning mechanism provides dynamic tension control to the solid electrolyte membrane. By continuously applying an adjustable tensile force that can adapt to thermal expansion conditions, the system maintains membrane flatness and prevents sagging while allowing for operational flexibility in different film formation conditions.
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 effectively suppresses unevenness and fluctuations in film thickness, resulting in a smoother and higher-quality metal film by maintaining the solid electrolyte membrane flat during the deposition process.
Implementation Method 1
a membrane tensioning mechanism configured to apply a tensile force from the central portion toward the outer edge portion while storing the heated electrolyte solution in the liquid reservoir, to elongate the central portion of the solid electrolyte membrane
Implementation Method 2
the solid electrolyte membrane thermally expands under the influence of heat from the electrolyte solution
Implementation Method 3
the electrolyte solution is poured into the liquid reservoir of the casing, followed by the application of a voltage between the anode and the substrate from the power supply. As a result, the metal ions contained in the solid electrolyte membrane are reduced on the surface of the substrate, thus depositing metals on the surface of the substrate to form a metal film
Data Source
AI summary
A film formation apparatus includes an anode, a solid electrolyte membrane between the anode and a substrate, a power supply that applies voltage between the anode and the substrate as a cathode, and a liquid reservoir that holds the anode and the solid electrolyte membrane while separating them apart from each other, the liquid reservoir storing electrolyte solution including metal ions between the anode and the solid electrolyte membrane. The solid electrolyte membrane includes a central portion that comes in contact with the substrate and the electrolyte solution, and an outer edge portion outside the central portion. The apparatus includes a membrane tensioning mechanism to apply a tensile force to the central portion toward the outer edge portion while storing the heated electrolyte solution in the liquid reservoir, to elongate the central portion.