Volterra's NOVA: Revolutionizing Flexible Electronics with Direct Ink Write

Voltera's NOVA: Revolutionizing Soft, Stretchable Electronics with Direct Ink Write

Context / Why this matters

The demand for flexible and stretchable electronics is on the rise, driven by innovations in wearable technology, medical devices, and advanced sensors. Traditional methods of creating printed electronics often rely on masks, screens, and tooling, which can be costly and time-consuming. Voltera's NOVA printer addresses these challenges with a groundbreaking approach: direct ink write (DIW) technology. This method opens new possibilities for manufacturing electronic circuits on a variety of flexible and rigid surfaces.

Main discussion

The Direct Ink Write (DIW) Technology

Voltera's NOVA stands out for its use of direct ink write (DIW) technology. Unlike conventional printing methods, DIW eliminates the need for masks, screens, and traditional tooling. Instead, it employs a computer-guided nozzle that precisely deposits functional materials exactly where they are needed. This precision is crucial for creating intricate electronic circuits on flexible substrates.

The DIW process involves a Smart Dispenser, a cartridge that continuously monitors the pressure, temperature, and viscosity of the ink in real-time. This dynamic sensing ensures a consistent material flow, which is essential for maintaining the quality and integrity of the printed circuits. The closed-loop pressure control and material heating up to 40°C further enhance the consistency of the dispensed material, making the process reliable and efficient.

Versatility in Material and Surface

One of the key advantages of the Voltera NOVA is its ability to handle a wide range of inks and materials. From thin inks with a viscosity of 1000 centipoise to thick pastes with a viscosity of 1 million centipoise, the printer can manage it all. This versatility extends to the types of materials it can print on, including flexible polyamide and PET, stretchable TPU, and even paper. The ability to print on such a variety of surfaces makes the NOVA a highly adaptable tool for different manufacturing needs.

The printer can lay down conductive, dielectric, and adhesive materials with a precision down to a 100-micron trace. This level of detail is crucial for creating precise and reliable electronic circuits. The flexibility in material and surface options allows for the creation of electronic components that can bend and stretch, making them suitable for a wide range of applications, from wearable devices to advanced medical sensors.

Practical Applications

The capabilities of the Voltera NOVA open up numerous practical applications. In the field of wearable technology, the NOVA can print flexible circuits that can be integrated into clothing and accessories, providing functionalities such as health monitoring and augmented reality. In the medical field, the printer can create stretchable sensors that can conform to the body, enhancing the accuracy and comfort of diagnostic and therapeutic devices.

Moreover, the NOVA's ability to print on various surfaces makes it valuable for prototyping and small-batch production. Researchers and developers can quickly produce and test new electronic designs without the need for extensive tooling and setup. This agility in production can accelerate innovation and bring new electronic products to market faster.

Practical tips

When working with the Voltera NOVA printer, there are several practical tips to keep in mind to ensure optimal performance and results:

Material Preparation

• Viscosity Control: Ensure that the ink viscosity is within the recommended range (1000 to 1,000,000 centipoise). Adjust the viscosity if necessary to achieve the desired flow characteristics.
• Temperature Management: Maintain the material temperature within the specified range (up to 40°C) to keep the flow steady and consistent.

Printing Parameters

• Pressure Control: Utilize the closed-loop pressure control system to monitor and adjust the pressure in real-time. This helps in maintaining a consistent material flow.
• Nozzle Maintenance: Regularly clean and maintain the nozzle to prevent clogging and ensure precise material deposition.
• Surface Preparation: Prepare the printing surface by ensuring it is clean, flat, and free of contaminants. This will help in achieving better adhesion and print quality.

Post-Printing Care

• Curing and Drying: Allow the printed circuits to cure and dry properly to ensure they adhere well to the surface and maintain their mechanical and electrical properties.
• Testing and Inspection: Conduct thorough testing and inspection of the printed circuits to identify any defects or issues that may need addressing.

Important takeaways

• Innovative Technology: Voltera's NOVA utilizes direct ink write (DIW) technology, which eliminates the need for masks, screens, and traditional tooling, making the printing process more efficient and versatile.
• Versatility: The printer can handle a wide range of inks and materials, from thin to thick pastes, and can print on various surfaces, including flexible and rigid materials.
• Precision: The NOVA can lay down materials with a precision down to a 100-micron trace, ensuring high-quality and reliable electronic circuits.
• Applications: The capabilities of the NOVA make it suitable for a wide range of applications, from wearable technology to medical sensors and prototyping.

Conclusion

Voltera's NOVA represents a significant advancement in the field of flexible and stretchable electronics. With its direct ink write (DIW) technology, the NOVA offers a versatile and efficient way to create high-quality electronic circuits on a variety of surfaces. Whether it's for wearable technology, medical devices, or prototyping, the NOVA's capabilities make it a valuable tool for innovation and development. By embracing this technology, manufacturers and developers can push the boundaries of what's possible in electronic design and production.