A multi-chip-architecture based flexible stimulation device for retinal prosthesis with a flip-chip packaging...

Area of Science:

• Biomedical Engineering
• Neuroscience
• Materials Science

Background:

• Retinal prostheses aim to restore vision by electrically stimulating remaining retinal neurons.
• Existing devices face challenges in flexibility, thinness, and biocompatibility for optimal neural interface.
• Advancements in microelectronics and packaging are crucial for developing next-generation visual prostheses.

Purpose of the Study:

• To design and characterize a novel, flexible neural stimulation device for retinal prosthesis applications.
• To develop and demonstrate a suitable packaging technique for creating a thin, implantable neural stimulation device.
• To leverage multi-chip architecture for enhanced performance and miniaturization of retinal implants.

Main Methods:

• Design and simulation of a novel CMOS stimulation device based on a multi-chip architecture.
• Fabrication and characterization of the designed stimulation device.
• Development and testing of a specialized packaging technique for thin, flexible devices.
• Utilization of flip-chip bonding technology for device assembly.

Main Results:

• Successful design and characterization of a novel CMOS stimulation device.
• Demonstration of a viable packaging technique for a thin, flexible neural stimulation device.
• Confirmation that flip-chip bonding is essential for fabricating the flexible device.

Conclusions:

• A multi-chip-architecture based flexible neural stimulation device for retinal prostheses has been successfully designed and demonstrated.
• The developed packaging technique is suitable for creating thin and flexible neural stimulation devices.
• Flip-chip bonding is a critical technology for the fabrication of these advanced flexible neural implants.