Reticle Pod Self-Locking Mechanism for EUV Contamination Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional reticle pods are prone to contamination due to accidental opening, which can lead to dust intrusion and defects in reticles, especially in advanced lithography environments like EUV lithography, where cleanliness is strictly required.
Innovation Solution
A reticle pod design featuring a sliding fastening member with a resilient arm and oblique guide surface, which automatically locks the cover and body together when closed, preventing unexpected opening and ensuring enhanced safety and ease of use, even if the user forgets to manually lock the fastener.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fasteners are used that require manual manipulation to lock, then the device complexity is reduced, but the reliability decreases because the pod can open unexpectedly if the fastener is not properly locked
Solution Approach 1:
The sliding fastening member automatically locks itself when the cover is closed by pushing it against the shut corresponding element, which compresses the resilient arm to engage with the dent portion. The system serves itself by using the closing action to trigger the locking mechanism without requiring separate manual intervention.
Solution Approach 2:
The resilient arm is pre-positioned to engage with the dent portion when the cover is closed, creating a preliminary locking action. The oblique guide surface ensures the fastening member is pushed into the locked position before the cover is fully closed, preventing accidental opening.
2Ease of operation
If manual fastening operation is required, then the ease of operation is improved for deliberate locking, but the loss of time increases due to the additional manual step
Solution Approach 1:
The fastening mechanism performs the locking action automatically when the cover is closed, eliminating the need for separate manual fastening operations. The sliding fastening member is pushed into the locked position by the shut corresponding element during the closing process itself.
3Ease of manufacture
If the fastening mechanism is simplified, then the ease of manufacture is improved, but the reliability decreases due to increased risk of accidental opening
Solution Approach 1:
The resilient arm and oblique guide surface create a self-locking mechanism that automatically engages when the cover is closed, providing reliable protection without complex additional components. The design uses the closing force itself to trigger the locking action.
Solution Approach 2:
The oblique guide surface provides a curved, inclined path that guides the sliding fastening member into the locked position. This curved surface ensures reliable engagement through geometric constraint rather than complex mechanical linkages.
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 reticle pod effectively prevents contamination by ensuring the reticle pod remains sealed, enhancing safety and reducing the likelihood of manufacturing errors and costs associated with contamination.
Implementation Method 1
the resilient arm releases resilient potential energy, thereby allowing the sliding fastening member to return to the free position
Data Source
AI summary
A reticle pod includes a body, cover, sliding-rail member, sliding-fastening member and shut-corresponding element. The sliding-rail member has a dent portion and a slot portion and defines a locked direction. The dent portion extends from the slot portion in the locked direction. The sliding-fastening member is slidably disposed at the sliding-rail member. The sliding-fastening member has a fastening portion and resilient arms. The resilient arms are inserted into a slot of the slot portion. The fastening portion has a fastening groove corresponding in height to the slot portion. An oblique-guide surface is disposed above the fastening groove. When the cover switches from an open state to a closed state, the shut-corresponding element pushes the sliding-fastening member across the oblique-guide surface and thus compresses the sliding-fastening member, allowing the shut-corresponding element to enter the fastening groove. Then, the resilient arms releases resilient potential energy whereby the sliding-fastening member rebounds.