Wafer Storage Cap Assembly With Single-Side Locking for Easy Detachment
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Solution Overview
Problem
Existing wafer storage containers with caps mounted on their lower portions face difficulties in easy attachment and detachment, often resulting in cap damage due to the required force for detachment.
Innovation Solution
A wafer storage container and cap assembly design where a hook is formed only on the first surface of the cap, with a locking portion and a fixing wall structure that allows easy attachment and detachment, reducing the risk of cap damage and simplifying the mold structure for cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If caps with hook shapes on opposite sides are mounted on the lower portion of the substrate storage container, then the caps can be securely fastened, but it becomes difficult to detach the caps and parts of the caps may be destroyed when force is applied
Solution Approach 1:
The cap structure is segmented into a single hook shape on one side rather than symmetric hook shapes on opposite sides. This allows the cap to be securely fastened through the locking portion engaging with the fastening hole, while the asymmetric design enables easier detachment by applying force only to the non-hook side, preventing cap destruction
Solution Approach 2:
The cap is designed with asymmetric structure: a locking portion with hook shape on one side for secure fastening, and a smooth opposite side for easy detachment. This asymmetric design resolves the contradiction by providing strong fastening capability where needed while enabling easy removal without applying force to the hook portion
2Reliability
If caps are formed in structures requiring at least a predetermined level of force for detachment, then the caps can be securely mounted, but parts of the caps may be destroyed when force is applied
Solution Approach 1:
The hook shape is extracted from both sides of the cap and placed only on one side. The locking portion with hook shape provides secure mounting through engagement with the fastening hole, while the opposite side is left smooth and free of hooks, allowing detachment without force that could damage the cap structure
3Stability of the object's composition
If a hook is formed on both sides of the cap for secure fastening, then the cap can be firmly attached, but the mold structure becomes complex and costs increase
Solution Approach 1:
The hook shape is extracted from one side of the cap and placed only on the other side. This single-sided hook design maintains attachment stability through the locking portion engaging with the fastening hole, while significantly simplifying the mold structure compared to forming hook shapes on both sides of the cap
Data Source
AI summary
A wafer storage container and a cap assembly according to an embodiment include a storage container having a space accommodating at least one wafer therein, a fastening portion having a fastening space capable of fastening a cap, and the cap having a locking portion which is formed linearly on a first side of the cap and which has an end portion provided with a first protrusion portion, the cap being configured in a structure in which the locking portion is fastened to the fastening portion. The fastening portion includes an inner wall, and a fastening hole which is formed in a first side of the fastening portion such that the locking portion is fastened thereto. The cap includes a fixing wall in close contact with the inner wall, thereby fixing the cap to the fastening portion.