Wafer Transport Packaging with Offset Elastic Vibration Support
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Solution Overview
Problem
Existing packaging units for transporting semiconductor wafers face issues with storage case inclination due to warpage of plastic plates under elastic deformation, reduced vibration absorption with increased elastic bodies, and widened gaps between cushioning materials and containers, leading to reduced damping effects during transportation.
Innovation Solution
A packaging unit with a specific configuration that includes a lower cushioning material, middle cushioning materials, and upper cushioning materials, along with a vibration absorbing unit featuring a first flat plate, a second flat plate, and elastic bodies strategically positioned to minimize plate warpage and maintain stable object orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a large number of elastic bodies are provided in the vibration absorbing unit, then the warpage of the plastic plate can be restrained, but the absorption effects for vibrations and impacts are reduced
Solution Approach 1:
The patent applies local quality by positioning elastic bodies at specific locations rather than uniformly distributing them. The first elastic body is positioned at the center of the storage case, and the second elastic body is positioned at a specific distance from the center in the width direction. This localized positioning provides sufficient plate stability while maintaining vibration absorption effectiveness, avoiding the need for a large number of elastic bodies throughout the entire structure.
Solution Approach 2:
The patent changes the parameter of elastic body positioning from uniform distribution to specific strategic locations. By defining the position of the second elastic body at a specific distance from the center (within a defined range), the system achieves optimal balance between plate stability and vibration absorption with a minimal number of elastic bodies.
2Ease of manufacture
If the center of elastic bodies is aligned with the centroid of storing objects, then the positioning is simple, but the storage cases are inclined and cushioning materials contact each other
Solution Approach 1:
The patent applies asymmetry by intentionally offsetting the position of the second elastic body from the center of the storage case. The second elastic body is positioned at a specific distance from the center in the width direction, creating an asymmetric configuration that prevents storage case inclination while maintaining manufacturing feasibility through clearly defined positioning parameters.
3Productivity
If storage cases are stacked vertically in double deck, then the transportation capacity is increased, but the storage cases in the upper deck are more inclined than those in the lower deck
Solution Approach 1:
The patent applies local quality by providing different elastic body configurations for different decks. Each storage case is equipped with appropriately positioned elastic bodies (first at center, second at specific offset), ensuring that upper deck storage cases receive the same stability support as lower deck cases, thereby preventing inclination in double-deck configurations.
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 restrains the inclination of storage cases, ensures stable extraction of objects and cushioning materials, and enhances vibration absorption and damping effects during transportation, thereby protecting semiconductor wafers from damage.
Implementation Method 1
The elastic bodies of the vibration absorbing unit are elastically deformed to absorb vibrations and impacts
Implementation Method 2
The vibration absorbing unit is a unit for damping vibrations of the storage case during transportation by the elastic bodies
Data Source
AI summary
A packaging unit includes a lower cushioning material; middle cushioning materials each one of which is interposed between storing objects in corresponding one of two rows in an upper deck and a lower deck; upper cushioning materials; and a vibration absorbing unit provided on a bottommost portion of a container. The vibration absorbing unit includes a first flat plate, a second flat plate, and elastic bodies. The center of each of the elastic bodies is outside a centroid of corresponding one of the storing objects with respect to the center of the two rows of the storing objects. A distance between the center of each of the elastic bodies and the centroid of corresponding one of the storing objects in the width direction is in a range from 2% to 8% of a maximum outer diameter of the elastic body.