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Presented for TTI Vanguard "Shift Happens" conference (http://bit.ly/TTIVshifthappens) visit to PARC, this is an overview of an all-printed and therefore low-cost, disposable sensor that conforms to …

Presented for TTI Vanguard "Shift Happens" conference (http://bit.ly/TTIVshifthappens) visit to PARC, this is an overview of an all-printed and therefore low-cost, disposable sensor that conforms to the curvature of a helmet.

Developed for DARPA to monitor soldiers' blast exposure and prevent traumatic brain injury, the technology can be applied to multiple biomedical and other applications.

Published in Technology , Business
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  • 1. Printed Flexible Electronics and Sensors Ana Claudia Arias, Ph.D. Printed Electronic Devices Electronic Materials and Devices Laboratory  s =  sl +  l . cos   s =  sl +  l . cos 
  • 2. Motivation for printed flexible electronics
    • Wish list
    • Conformal
    • Foldable
    • Unbreakable
    • Light weight
    • Thin
    • Less expensive – high performance
    • Unique and customized
    • New product development
    • Science/Engineering argument
    • New materials
    • New interfaces
    • New problems
    • New physics, new chemistry
    • New device fabrication techniques – cool engineering
    • Many applications: nano, solar, bio
    • Scientific breakthrough
    • Commercialization
    • Materials, processing and flexible substrate integration can be a challenge
    • Materials stability and performance inferior to well established silicon industry – first product needed to establish credibility
    • Manufacturing tools need to be adapted to handle flexible substrates
    • Risk takers and early adopters needed
    • No flexible electronic product commercially available
    • Where flexible electronics is really needed/wanted?
  • 3. Amazon Kindle A lot of activity on displays: products on the market
    • Several products available
    • All rigid products
    • Backplane based on a-Si technology
    • Display media from E-ink
    • Low power consumption
    • Content oriented business model most successful
  • 4.
    • Several flexible display demonstrations
    • Full color and monochromatic
    • Multiple backplanes and front planes used
    • Integration with a product needed
    Flexible display demonstrators PARC Lucent
  • 5. Printed electronics applications
    • Some examples
    Duracell: Battery tester Cypak: Intelligent Pharmaceutical Packaging PolyIC: RFID CSG: via etching Plastic Logic: e-paper CDT: OLED displays Konarka: Solar cell Pelikon: EL displays Power Paper: battery
  • 6. Approaches: From inorganic rigid materials to flexible systems Courtesy of Prof. John Rogers
    • Inorganic-based flexible structures:
    • New processing methods allow fabrication of flexible structures
    • Control of materials performance under low temperature processing
    • Stamping and pick and place allow large area fabrication
    • High performance systems
  • 7. Approaches: Organic and inorganic materials
    • Processed at low temperature
    • Many materials sputtered at room temperature
    • Others can be processed from solution
    • Organic materials are inherently flexible
    • Compatible with flexible substrates
    • Opens up new manufacturing opportunities
  • 8.
      • New and unique science problems
      • Lower capital investment
      • Large area capability
      • Rigid or flexible substrates
      • Extremely thin
      • Environmentally friendly
      • Less photolithography, vacuum
      • Short turnaround/cycle time
      • Customization ease
    PARC’s approach: Solution-based electronics Electronic components printed like documents are printed
  • 9. From photolithography to additive processing Many processing steps and a lot of materials waste One step for patterning and deposition Additive printing Photo - lithography resist Deposit film resist Deposit film
  • 10. Thin-film transistors are the building blocks for electronics
    • TFT is a switch!
    • high I on (~mA)
    • low I off (~pA)
    semiconductor Display pixel via layer drain pad gate line media dielectric data line Top view gate line data line pixel pad ~ 300 mm TFT
  • 11. All additive printed arrays
      • PEN substrate
      • Printed nanoparticle metals
      • Polymer dielectric
      • Polymer semiconductor (PQT + others)
      • Reflective display format
    Gate line Data line Semiconductor Pixel pad 340 um 680 um PARC has demonstrated all-printed TFT backplanes for displays
  • 12. Technology platform creation: Working with clients to accelerate their entry to market
  • 13. Sensor tape project
    • $5M funding for 3 year project to develop:
    • Printed sensors: accelerometers, acoustic, pressure and temperature
    • Light sensors
    • Non-volatile printed memory
    • Printed CMOS
    • Deliver prototype capable of monitoring mechanical shock . Data is stored in the printed memory
    • This technology can be used to monitor vital signs in patients – civilian applications
  • 14. Circuit integration with printed sensors MEMS sensors Printed organic amplifiers After write V sd = -5,-20V Pressure signal after amplifier Pressure signal without amplifier Use printed amplifier to boost write voltage into memory cell V DD V out V in bias Switch TFTs memory TFT
  • 15. To subscribe to the PARC Innovations Update e-newsletter or blog, or to follow us on Twitter, go to http://www.parc.com/about/subscribe.html For more information, please contact: Ana Arias ana.arias@ parc.com Jennifer Ernst, Business Development [email_address]