Glass Sealing for Crystal Device Vacuum Joints
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Solution Overview
Problem
The existing glass sealing methods for electronic devices, such as crystal devices, require the use of expensive activated brazing materials and complex high-temperature heat treatment processes, increasing manufacturing costs and complexity.
Innovation Solution
A glass sealing method that uses a low melting-point glass sealing material in a ring-like form between the lid and element loading members, which is melted and hardened in a vacuum to create a hermetic seal without the need for activated brazing materials, simplifying the manufacturing process and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If activated brazing material is used to join the lid member and element loading member, then joint strength is improved, but manufacturing cost and process complexity increase
Solution Approach 1:
The invention extracts and removes the activated brazing material from the sealing structure, relying solely on glass sealing material to provide both sealing and joint strength functions. This eliminates the need for separate brazing material layers and associated complex manufacturing processes while maintaining sufficient joint strength between the lid member and element loading member.
Solution Approach 2:
The glass sealing material is designed to perform multiple functions simultaneously: it provides hermetic sealing of the vacuum space, creates mechanical joint strength between components, and eliminates the need for separate brazing materials. This multi-functional approach simplifies the overall structure and manufacturing process.
2Strength
If activated brazing material and high-temperature heat treatment are used, then joint strength is improved, but manufacturing cost increases
Solution Approach 1:
The invention replaces expensive activated brazing materials with a more economical glass sealing material formulation. The glass sealing material is designed to be cost-effective while providing sufficient performance, eliminating the need for costly specialized materials and their associated processing requirements.
Solution Approach 2:
The invention changes the material parameters by formulating glass sealing material with specific compositions (including metal powders, glass powders, and organic vehicles) that enable lower processing temperatures and reduced material costs while maintaining joint strength requirements.
3Strength
If multiple sealing materials are used, then joint strength is improved, but manufacturing steps increase
Solution Approach 1:
The invention merges the functions of glass sealing material and activated brazing material into a single integrated glass sealing material formulation. This consolidation eliminates multiple material application steps and simplifies the sealing process, improving manufacturing efficiency while maintaining joint strength through the multi-functional glass material design.
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
This method achieves sufficient joint strength between the lid and element loading members, simplifies the manufacturing steps, and reduces costs by eliminating the need for activated brazing materials, while maintaining excellent oxidation and humidity resistance.
Implementation Method 1
the glass sealing material 95 is melted by applying heat in an atmospheric pressure atmosphere to join the lid member 93 and the element loading member 92
Implementation Method 2
a glass sealing material which is provided in a ring-like form between a fringe of the lid member on the one main surface side and a fringe of the element loading member on the one main surface side, and keeps the space in vacuum
Data Source
AI summary
An electronic device and a glass sealing method used therefor, with which a sufficient joint strength can be acquired only with the use of a glass sealing material without using an activated brazing material is provided. A crystal device includes an element loading member, lid member, a crystal vibration element, and a glass sealing material. The glass sealing material is provided in a ring-like form between the fringe of the lid member on a main surface side and the fringe of the element loading member on a main surface side, and keeps a space in vacuum.