Superstrate Chuck Loading Pins for Precise Parallel Alignment
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Solution Overview
Problem
Current planarization methods face challenges in achieving accurate positioning and target parallelism of a superstrate onto a superstrate chuck, and in limiting the force applied during loading, which affects the precision and efficiency of semiconductor substrate processing.
Innovation Solution
A system with radially outward pins that raise from a retracted position to a receiving position to support and couple the superstrate with the superstrate chuck, allowing for precise alignment and controlled force application during loading and unloading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a robot arm is used to directly load the superstrate onto the superstrate chuck, then the loading operation can be automated, but accurate positioning and target parallelism are difficult to achieve
Solution Approach 1:
The patent introduces an intermediary mechanism consisting of multiple pins that can be raised or lowered independently. These pins serve as a mediator between the robot arm and the superstrate, allowing the robot to place the superstrate on the pins rather than directly on the chuck. The pins can then be adjusted to achieve precise positioning and parallelism, resolving the contradiction between automation and precision.
2Extent of automation
If a robot arm is used to directly load the superstrate onto the superstrate chuck, then the loading operation can be automated, but target parallelism between the superstrate surface and chuck surface is difficult to achieve
Solution Approach 1:
The pins act as an intermediary that enables automated loading while simultaneously providing the capability to achieve target parallelism. Each pin can be independently positioned, allowing for fine-tuning of the superstrate orientation relative to the chuck surface after automated placement.
Solution Approach 2:
The pin mechanism is dynamic, allowing the pins to be raised or lowered during the loading process. This dynamic adjustment capability enables the system to compensate for positioning errors and achieve the desired parallelism between the superstrate and chuck surfaces.
3Device complexity
If direct loading is used, then the process is simpler, but the amount of force applied to the robot arm is difficult to limit
Solution Approach 1:
The pins serve as a force-distributing intermediary between the superstrate and the robot arm. By placing the superstrate on multiple pins rather than having the robot arm hold it directly, the weight and applied forces are distributed across multiple contact points, making force control more manageable while adding only moderate complexity to the system.
Data Source
AI summary
A method of loading a superstrate onto a superstrate chuck includes raising a plurality of pins located radially outward of a substrate chuck from a retracted position to a receiving position, placing the superstrate onto the plurality of pins while the plurality of pins are in the receiving position, and coupling the superstrate with the superstrate chuck while the superstrate is on the plurality of pins.