Substrate Storage Container Assembly for Particle-Free Fixing
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Solution Overview
Problem
Existing substrate storing containers face issues with particle generation and decreased positioning accuracy due to ultrasonic welding, which can lead to contamination and deformation during the manufacturing of semiconductor chips.
Innovation Solution
The use of press-fit fixing portions and impulse welding to securely attach components without ultrasonic welding, maintaining positioning accuracy and preventing particle generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ultrasonic welding is used to fix components to the container main body, then fixing reliability is improved, but particle generation occurs and manufacturing precision deteriorates
Solution Approach 1:
The fixing mechanism is divided into two distinct parts: press-fit fixing portions for initial positioning and impulse welding portions for final securing. This segmentation allows the press-fit portions to maintain positioning accuracy while the impulse welding portions provide reliable fixing without affecting the positioned components.
Solution Approach 2:
The press-fit fixing portions act as an intermediary mechanism between the component and the container main body. They first establish accurate positioning, and then the impulse welding portions are activated to secure the connection, preventing direct ultrasonic welding from affecting component positioning.
2Strength
If ultrasonic welding is used to fix components, then fixing strength is improved, but particle generation occurs causing contamination
Solution Approach 1:
The harmful particle-generating aspect of ultrasonic welding is extracted and isolated to specific impulse welding portions, while the press-fit fixing portions are designed to avoid particle generation. This allows the system to maintain fixing strength while minimizing contamination risks.
Solution Approach 2:
The potential harm of ultrasonic welding (particle generation) is converted into a controlled benefit by using impulse welding only where necessary, while relying on press-fit portions for the majority of fixing operations. This reduces overall particle generation while maintaining adequate fixing strength.
3Manufacturing precision
If press-fit fixing is used alone, then positioning accuracy is maintained, but fixing reliability deteriorates due to loosening and disengagement
Solution Approach 1:
The press-fit fixing portions perform the preliminary action of positioning components accurately before the impulse welding portions are activated. This preliminary positioning is maintained because the subsequent impulse welding does not affect the positioned components.
Solution Approach 2:
Different parts of the fixing system have different functions: press-fit fixing portions are optimized for positioning accuracy, while impulse welding portions are optimized for fixing reliability. This local differentiation allows each part to excel at its specific function without compromising the other.
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 approach allows for the production of substrate storing containers with high positional accuracy and cleanliness, preventing particle generation and deformation, while ensuring reliable fixing without the need for ultrasonic welding.
Implementation Method 1
an impulse welding portion that is formed by impulse welding, to maintain the positioning and fixing in the press-fit fixing portions
Implementation Method 2
press-fit fixing portions that are configured by being positioned by means of press fitting while being fixed to each other
Data Source
AI summary
A substrate storing container includes: a container main body; a lid body which is attachable to and detachable from a container main body opening portion, and which is able to block the container main body opening portion; and a component which is attached to the container main body or to the lid body. A connected part between the component and the container main body, the lid body or another component includes press-fit fixing portions, which are positioned by means of press fitting while being fixed to each other; and impulse welding portions which are formed by impulse welding, to maintain the positioning and fixing in the press-fit fixing portions.