Design and Fabrication Techniques of Devices for Embedded Power Active Contact Lens

<p>This thesis designed and fabricated various devices that were interfaced to an IC for an active contact lens that notifies the user of an event by detection of an external wireless signal. The contact lens consisted of an embedded antenna providing communication with a 2.4GHz system, as well as inductive charging at an operating frequency of 13.56 MHz. The lens utilized a CBC005 5<em>µ</em>Ah thin film battery by Cymbet and a manufactured graphene super capacitor as a power source. The custom integrated circuit (IC) was designed using the On Semiconductor CMOS C5 0.6 <em>µ</em>m process to manage the battery and drive the display. A transparent, flexible, single cell display was developed utilizing electrochromic ink to indicate to the user of an event. Assembly of the components, encapsulation, and molding were implemented to create the final product. The material properties of the chosen substrate were analyzed for their clearness, flexibility, and biocompatibility to determine its suitability as a contact lens material. Finally, the two different fabrication techniques (microfabrication and screen printing) that were employed to make the devices are compared to determine the favorable process for each part of the system.</p>

Name thesis:degree_name

MS in Electrical Engineering

Discipline thesis:degree_discipline

Electrical Engineering

Year dc:date.available

2015

Author dc:creator

• Leon, Errol Heradio

Contributors dc:contributor

• Tina Smilkstein

• Contact Lens
• Embedded
• Power
• Active
• EC Display
• Fabrication
• Biomedical
• Biomedical Devices and Instrumentation
• Electrical and Electronics
• Electronic Devices and Semiconductor Manufacturing
• Other Biomedical Engineering and Bioengineering
• Systems and Communications
• VLSI and Circuits, Embedded and Hardware Systems

Identifier

10.15368/theses.2015.53

OAI identifier oai:identifier

oai:digitalcommons.calpoly.edu:theses-2546