Novel Transparent Conductors for EMI Shielding of Sensor Windows

Period of Performance: 09/04/2002 - 09/04/2004


Phase 2 SBIR

Recipient Firm

Sienna Technologies, Inc.
19501 144th Avenue NE Array
Woodinville, WA 98072
Principal Investigator


The Phase I work demonstrated the feasibility of hard, electrically conductive novel ceramic thin films suitable for reducing electromagnetic interference while still permitting high transmittance in the infrared region. However, no performance optimization was performed. The Phase II program will continue with the success achieved in Phase I by expanding on materials- related issues. The work initiated in Phase I will be extended (i) to control the chemical composition and microstructure of the films to maximize both EMI shielding and IR transmission, (ii) to prepare sputtering targets having the optimized compositions, (iii) to control microstructure, crystallinity, and orientation of the deposited films to maximize carrier mobility, and (iv) to scale up the developed films and processes on large window materials. Several dopants of various concentrations will be added to already established materials. Sputtering targets of high purity will be fabricated via pressureless sintering. Coating on test windows will be prepared via sputtering. Prepared windows will be tested for EM attenuation, IR transmission, and erosion resistance. BENEFITS: Potential commercial applications include architectural shielding in industrial environments, view windows on magnetic resonance imaging systems, windows in embassy buildings and other government installations, view IR windows on all types of electronic equipment and instrumentation, and transparent electrodes in display devices.