Universal Load Port for Multi-Size Wafer Cassette Positioning
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Solution Overview
Problem
Conventional load ports are not adaptable to wafer cassettes of different sizes, limiting their practicality and ability to accommodate various wafer sizes used in the industry.
Innovation Solution
A load port design featuring a body with a carrier base, positioning mechanism, sensing mechanism, and detecting mechanism, which includes a slide groove, positioning unit, hooking unit, limiting unit, first and second detecting assemblies, and an adapter plate, allowing for the accommodation and detection of storage states of wafers in cassettes of varying sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional load port is designed for a specific wafer cassette size, then it can provide stable positioning and detection functions, but it cannot accommodate wafer cassettes of different sizes
Solution Approach 1:
The load port is designed with universal positioning protrusions and adjustable detection assemblies that can accommodate multiple wafer cassette sizes (6-inch, 8-inch, 12-inch). The positioning mechanism uses standardized protrusions that work with corresponding grooves in different cassette types, while the detection assembly can be adjusted to detect storage states across various cassette configurations, allowing one load port to serve multiple functions.
Solution Approach 2:
The detection assembly incorporates adjustable components that can be repositioned according to different wafer cassette sizes. The L-shaped lever arms and detecting units can be adjusted to match the specific dimensions and wafer positions of different cassette types, enabling the load port to dynamically adapt its detection parameters rather than requiring fixed detection points.
2Adaptability or versatility
If the load port uses fixed positioning structures, then it ensures precise positioning for a specific cassette size, but it cannot be adapted to different cassette sizes
Solution Approach 1:
The positioning mechanism is segmented into multiple standardized positioning protrusions distributed at specific locations on the carrier base. These protrusions can engage with corresponding grooves in different cassette sizes, providing precise positioning for each specific cassette type while maintaining overall system adaptability. The segmentation allows the same positioning structure to serve multiple cassette configurations.
3Adaptability or versatility
If the detection mechanism is designed with multiple detecting assemblies for different cassette sizes, then it can detect storage states of various cassette types, but it increases device complexity
Solution Approach 1:
The detection assembly uses L-shaped lever arms that can be adjusted to different positions and orientations depending on the cassette size being used. The detecting units can be repositioned along the lever arms to match the specific wafer storage positions of 6-inch, 8-inch, or 12-inch cassettes. This dynamic adjustability allows a single detection mechanism to handle multiple cassette types without requiring separate fixed detection assemblies for each size.
Data Source
AI summary
A load port adapted for wafer cassettes of different sizes detects storage states of wafers stored in the wafer cassettes. The load port includes a body, a positioning mechanism, a sensing mechanism, and a detecting mechanism. The body has a carrier base. The positioning mechanism is disposed on the body and has a positioning unit disposed on the carrier base, a hooking unit, and a limiting unit. The hooking unit is disposed in the body and has a driving assembly and a hooking element. The driving assembly is disposed in the body. The hooking element is mounted to the driving assembly. The sensing mechanism is disposed on the carrier base. The detecting mechanism is disposed on the body, detects the storage states of wafers stored in the wafer cassette, and has a first detecting assembly and a second detecting assembly spaced apart from each other.