Hermetic Seal Testing via Parallel Pressure Monitoring
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Solution Overview
Problem
Existing methods for testing the hermetic seal of packages are inefficient, as they can only test one package at a time and require a long observation time to detect pressure variations, limiting productivity and increasing costs.
Innovation Solution
A testing system that uses a handling machine to simultaneously test multiple packages by applying pressure to a secondary chamber within the package, utilizing a transducer device to detect pressure changes and determine if the seal is hermetic, allowing for faster and more parallel testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional pressure testing method is used to test hermetic seal, then the testing accuracy is sufficient, but the productivity is low because only one package can be tested at a time
Solution Approach 1:
The testing system is divided into multiple independent testing chambers (first testing chamber and second testing chamber), each capable of testing packages independently. This segmentation allows parallel testing of multiple packages simultaneously, thereby increasing productivity while maintaining manageable complexity through modular design
Solution Approach 2:
Multiple testing chambers are combined within a single testing system that shares common control and measurement resources. The first and second testing chambers operate in parallel but are integrated into one system, allowing simultaneous testing of multiple packages while efficiently utilizing shared components
2Measurement precision
If a traditional pressure testing method is used with high pressure, then the detection precision of leaks is sufficient, but the testing time is long due to required observation period
Solution Approach 1:
Pressure is applied to the packages in advance before the actual testing begins. The packages are pressurized within their respective chambers, and then the testing phase starts by monitoring pressure variations. This preliminary pressurization allows for faster detection during the testing phase
Solution Approach 2:
The testing process uses periodic pressure application and monitoring cycles. Pressure is applied, then monitored for variations over a predetermined time period, creating a rhythmic testing pattern that balances detection precision with reduced overall testing time compared to continuous observation methods
3Productivity
If multiple packages are tested simultaneously in parallel, then the productivity increases, but the device complexity increases significantly
Solution Approach 1:
The system segments the parallel testing function into distinct, identical testing chambers (first and second chambers), each with its own pressure application and monitoring capabilities. This modular segmentation enables parallel operation while keeping individual chamber complexity manageable and allowing for easy replication
Solution Approach 2:
Each testing chamber is designed as a universal module that can test any package type placed within it. The chambers share common design characteristics and can operate independently or in combination, providing multi-functional capability that increases productivity without proportionally increasing overall system complexity
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
Enables efficient and high-parallel testing of hermetic seals, detecting pressure variations quickly and accurately, thereby improving productivity and reducing costs by identifying leaks in sealed packages.
Implementation Method 1
applying pressure to a secondary chamber within the package
Implementation Method 2
utilizing a transducer device to detect pressure changes
Data Source
AI summary
A method for testing the hermetic seal of a packaged device, which includes: a package that delimits a device chamber; and a transducer device, which is arranged within the device chamber and generates an electrical signal indicating at least one physical quantity external to the package. The testing method includes the steps of: imposing a reference pressure in the device chamber; arranging the packaged device in a testing chamber in which a testing pressure is present, different from the reference pressure; and subsequently detecting possible pressure variations within the device chamber.