Vacuum Tunneling Device Sealing via Gradient Deposition
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Solution Overview
Problem
Existing vacuum tunneling devices face challenges in maintaining a high vacuum state and achieving enhanced electrical characteristics due to imperfect sealing, which can lead to breakdown and reduced reliability.
Innovation Solution
A method of manufacturing a vacuum tunneling device involves forming a sealing layer using a gradient deposition process in a vacuum chamber, which fills only the upper portion of the opening, ensuring the vacuum state is maintained and preventing breakdown, while using an auxiliary layer to cover the top end of the opening and allowing for the use of two-dimensional materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing layer is formed to completely fill the opening, then vacuum sealing is improved, but manufacturing complexity increases
Solution Approach 1:
The opening filling is segmented into two distinct parts: the auxiliary layer that covers the top end of the opening, and the sealing layer that fills the upper portion. This segmentation allows each layer to have optimized functions - the auxiliary layer provides top coverage while the sealing layer ensures vacuum sealing, simplifying the overall manufacturing process compared to forming a single complex sealing structure
Solution Approach 2:
The sealing layer is designed to fill only the upper portion of the opening rather than the entire opening. This partial action is sufficient to achieve the vacuum sealing function while reducing manufacturing complexity and material usage. The auxiliary layer complements this by covering the top end, creating an effective seal without requiring complete filling
2Ease of manufacture
If an auxiliary layer is added to cover the top end, then manufacturing flexibility is improved, but device structure becomes more complex
Solution Approach 1:
The auxiliary layer serves multiple functions simultaneously: it covers the top end of the opening to prevent contamination, provides a platform for the sealing layer deposition, and can be made from two-dimensional materials that also contribute to electrical performance. This multi-functionality justifies the additional layer by consolidating multiple requirements into a single structural element
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 method ensures the vacuum tunneling device maintains a high vacuum state, preventing breakdown and enhancing electrical characteristics by using a sealing layer formed through gradient deposition and an auxiliary layer to cover the opening, thereby improving the device's reliability and performance.
Implementation Method 1
performing a gradient deposition process in a vacuum chamber to form a sealing layer on the insulating interlayer
Data Source
AI summary
A method of manufacturing a vacuum tunneling device, the method including forming a tunnelling device on a substrate; forming an insulating interlayer on the substrate such that the insulating interlayer has an opening exposing the tunneling device; and performing a gradient deposition process in a vacuum chamber to form a sealing layer on the insulating interlayer such that the sealing layer fills an upper portion of the opening.