Heating Chamber Door Assembly for Substrate Warpage Control
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Solution Overview
Problem
The semiconductor industry faces challenges in heat treatment of substrates with embedded silicon devices and plastic matrices, which exhibit warpage due to instability, leading to poor temperature uniformity and increased complexity and cost in existing hot plate systems.
Innovation Solution
A system with a housing defining a heating chamber and a door assembly that can be opened and closed, allowing for multiple substrate processing zones and automated loading/unloading, using a control unit and actuators to move the door assembly and loading assembly for efficient heat treatment without disrupting temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If hot plates in individual chambers are used for heat treatment, then substrates can be heated, but temperature uniformity deteriorates due to substrate warpage
Solution Approach 1:
The heating chamber is divided into multiple heating zones with independent temperature control, allowing each zone to be optimized for substrates at different positions, thereby maintaining temperature uniformity across warped substrates
Solution Approach 2:
Different regions of the heating chamber provide different heating characteristics to accommodate substrate warpage, with localized heating adjustments made based on the specific warpage pattern and position of substrates
2Productivity
If multiple hot plate chambers are used to handle lengthy processes, then processing capacity increases, but device complexity and cost increase
Solution Approach 1:
Multiple heating zones are integrated into a single heating chamber, allowing simultaneous processing of multiple substrates with different timing requirements without requiring separate chambers, thereby reducing overall system complexity
Solution Approach 2:
The heating system provides dynamic, independently controllable heating zones that can be adjusted in real-time to accommodate varying process requirements, eliminating the need for static multiple chambers
3Ease of operation
If door covers are opened for each chamber access, then substrates can be loaded and unloaded, but space occupation and operational complexity increase
Solution Approach 1:
A single door assembly with multi-position capability serves multiple functions: it provides access to different heating zones at different positions and maintains sealing for the entire chamber, replacing the need for separate door covers on multiple chambers
4Temperature
If warped substrates are sucked flat on the plate, then temperature uniformity improves, but cost and complexity increase
Solution Approach 1:
The heating system provides localized heating adjustments in different zones to accommodate substrate warpage without requiring mechanical flattening, using thermal management rather than mechanical force
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 system enables efficient and uniform heat treatment of substrates across multiple zones, reducing warpage issues and operational complexity while maintaining temperature consistency, thus improving processing efficiency and reducing costs.
Implementation Method 1
Because a hot plate heats by both radiation and natural convection
Implementation Method 2
Because a hot plate heats by both radiation and natural convection
Data Source
AI summary
A system and/or method for heat treatment of substrates. The system includes a housing that defines a heating chamber and a door assembly that encloses an opening of the heating chamber. The door assembly may be opened and closed. When opened, the door assembly defines a loading slot for loading substrates into and unloading substrates from the heating chamber. The door assembly is coupled to a first actuator and a control unit is coupled to the actuator to move the door assembly between a plurality of loading positions. The system may also include a loading assembly mounted to the door assembly to facilitate insertion and removal of substrates from the heating chamber.