SF Bay Area Nanotechnology Council

IEEE

3D Interferometry and Nanomechanics – Electronics, Face Masks and More

Kurt Rubin, KLA Tencor

Tues Feb 16
     11:30 am – Sign-ins begin
     12:00 pm – Program starts
       1:30 pm – Event ends
Cost: Free, but registration is required

Register on Eventbrite: Here
     Registered attendees will receive an email with a link for the Zoom meeting

     3D optical profiling is a noncontact, high-resolution measurement and visualization technique used to measure the topography and geometry of devices and materials. Capabilities of commercial 3D interferometry systems have steadily improved; today, they can measure vertical nano- and microtopography spanning Ångstroms to many millimeters in length scale. True Color imaging, developed by KLA, provides additional understanding that is complimentary to topography. Advances in optomechanical hardware, optics, electronics, and software now make it possible to create economical precision 3D interferometric measurement systems, enabling 3D profiling to help a broader range of industrial and scientific applications.
     This talk provides an example of how the capabilities of this new generation of 3D optical measurements can be applied to the fields of printed and flexible electronics. Flexible electronics is characterized by a rich and diverse set of functions, device topographies, fabrication technologies, and various materials (conducting, insulating, dielectric, etc.), which have complex surface structures with diverse optical properties. Multiparameter printed arrays on flexible substrates can be used for sensing humidity, temperature, and mechanical strain, as well as for thermoelectric generators and many other purposes, all of which have performance dependencies upon geometry and fabrication process.
    Ultraviolet germicidal irradiation (UVGI) N95 filtering facepiece respirator (FFR) treatment is considered an effective decontamination approach to address the supply shortage of N95 FFRs during the ongoing Covid-19 pandemic. We investigated the nanomechanical and non-contact 3D optically-measured topographic properties of filtration fibers that have been exposed to different doses of UVC radiation. UVC exposure was shown to decrease both Young’s modulus (E), hardness (H) and fiber width, as measured on individual polypropylene (PP) fibers. Our results also show that the PP microfiber layer loses its strength when N95 respirators are exposed to an accumulated UVC dose during the process of decontamination, and the PP fiber width also exhibits a logarithmic decrease during UVC exposure. The nanoscale measurement results on individual fibers suggest that maximum cycles of UVC disinfection treatment should be limited due to excessive accumulated dose, which has the potential to decrease the fiber breaking strength.
     This talk will discuss examples of how optical and nanomechanical characterization can improve understanding of devices and materials, including the above topics, and more.

Read More:
     3D optical interferometry with True Color visualization advances understanding of flexible electronics
     Effect of Ultraviolet C Disinfection Treatment on the Nanomechanical and Topographic Properties of N95 Respirator Filtration Microfibers

               

     Kurt Rubin is an Applications Development Engineer at KLA Instruments where he focuses on advanced optical and electrical measurement and modeling. He has an extensive background in the invention of new optical, electrical and magnetic devices, materials and the development of new processes to fabricate them. He is an inventor of fundamental technology underlying multilayer optical storage and high-speed reversible memories. He holds 60 issued patents and degrees in physics and materials science from MIT, University of Washington and Stanford University.



TheIEEE Nanotechnology Council provides a forum for leading researchers and companies to discuss their work, along with networking opportunities for local scientists and engineers

In 2014, 2016, and again in 2019, the Nanotech Council was awarded Best Chapter for IEEE Region 6, out of of 200+ chapters in 12 states
In 2014, 2017, and again in 2019, the Council was awarded Nanotech Chapter of the Year by the IEEE Nanotech Council (worldwide)

Photos from past events posted: Here