Robust Arduino controlled spin coater using a novel and simple gravity chuck design

Area of Science:

• Materials Science and Engineering
• Open-Source Hardware Development

Background:

• Spin coating is a critical technique for thin film fabrication.
• Existing spin coaters (proprietary and open-source) present challenges in reliability, usability, and cost.
• Commercial chuck replacements can be prohibitively expensive.

Purpose of the Study:

• To present a novel, user-friendly, open-source gravity-chuck spin coater.
• To achieve minimal points of failure and a low material cost (~$100 USD).
• To offer a flexible and cost-effective solution for thin film deposition.

Main Methods:

• Designed and constructed an open-source gravity-chuck spin coater.
• Incorporated a unique chuck design featuring interchangeable brass plate sample masks.
• Utilized basic skills and common hand tools for mask fabrication.

Main Results:

• The developed spin coater has a material cost of approximately $100 USD (1500 ZAR).
• The interchangeable mask system allows for sample-size specificity and easy customization.
• The design minimizes points of failure, enhancing reliability.

Conclusions:

• This open-source spin coater provides a highly reliable, cost-effective, and versatile alternative to commercial systems.
• The design is particularly beneficial for institutions in developing countries or those with budget constraints.
• It serves as a model for accessible hardware development in scientific research.