Modular Substrate Processing System for Low-Volume MEMS Fabrication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The high cost and complexity of semiconductor fabrication equipment, coupled with the impracticality for low-volume component designers to access or afford dedicated equipment, hinder the production of microelectromechanical systems (MEMS) sensors and other low-volume components due to the industry's focus on high-volume production.
Innovation Solution
A modular and interchangeable substrate processing system optimized for smaller substrates (1-2 inches in diameter), allowing for various processing functions like deposition, etching, and ion implantation, with a lower assembly supporting fluid, electrical, and diagnostic connections, and upper assemblies that can be easily swapped to perform different fabrication processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semiconductor fabrication equipment is designed for high-volume production with large substrates, then productivity and device cost are improved, but adaptability to low-volume components and equipment accessibility deteriorate
Solution Approach 1:
The fabrication system is divided into separate functional modules (deposition module, etching module, sputtering module, ion implantation module) that can be independently selected and configured. Each module handles a specific fabrication process, allowing the system to be customized for different production volumes and component types without requiring complete equipment redesign.
Solution Approach 2:
The system employs a universal chamber design with standardized interfaces that can accommodate multiple processing functions. The same basic chamber structure supports various upper assemblies for different fabrication processes, enabling a single system to serve both high-volume and low-volume production needs across different component types.
2Ease of manufacture
If dedicated semiconductor fabrication equipment is purchased for low-volume components, then manufacturing capability is improved, but cost and financial burden increase
Solution Approach 1:
Multiple fabrication functions (deposition, etching, sputtering, ion implantation) are combined into a single integrated system with shared vacuum chambers, control systems, and support infrastructure. This consolidation eliminates the need for separate dedicated equipment for each process, reducing overall equipment cost and complexity while maintaining full manufacturing capability for low-volume components.
3Productivity
If fabrication time is reserved at contract manufacturing companies, then production capability is improved, but temporal and financial costs increase
Solution Approach 1:
The system enables institutions to perform fabrication in-house using the modular equipment, eliminating dependence on external contract manufacturing companies. Users can directly operate the system to produce low-volume components according to their own schedules, reducing both temporal delays and financial costs associated with outsourcing fabrication services.
4Productivity
If substrate size is increased to produce more devices per substrate, then productivity is improved, but adaptability to small substrates and system footprint worsen
Solution Approach 1:
The system employs adjustable and reconfigurable components including variable substrate holder positions, movable processing heads, and adjustable process parameters. This dynamic capability allows the same system to efficiently process both small substrates for low-volume research applications and larger substrates for higher-volume production, adapting the effective processing area to match substrate size without requiring separate systems.
Data Source
AI summary
A substrate processing system that is optimized for the production of smaller volumes of semiconductor components is disclosed. To minimize cost, the substrate processing system is designed to accommodate smaller substrates, such as substrates having a diameter of roughly one inch. Additionally, the components of the substrate processing system are designed to be interchangeable, thereby further reducing cost and complexity. In certain embodiments, the substrate processing system comprises a lower assembly, which may be used with one or more upper assemblies. The lower assembly is used to support the substrate and provide many of the fluid, electrical, and sensor connections, while the upper assemblies include the apparatus required to perform a certain fabrication function. For example, different upper assemblies may exist for deposition, etching, sputtering and ion implantation.