Description
Electromagnetic Interference (EMI) and Radio Frequency
Interference (RFI) filters prevent interference in electrical
devices due to stray electromagnetic radiation. Radiation
of this nature can be produced from something as common
as a cellular phone or computer monitors. It is also produced in military arenas as disruptive countermeasures. EMI/RFI filters are required in medical environments throughout Europe, and increasingly in America. All military equipment, including displays, requires an EMI/RFI filter to prevent disruption of images from enemy interference. In addition, all military platforms requiring visible apertures and a low radar cross section must employ continuous film shielding to maintain
stealth performance.

Typically electronic devices are simply shielded with
a metal container or liner. However, displays must be
shielded with something that is somewhat transparent.
In most cases, fine tungsten mesh is stretched across
a piece of glass or plastic providing excellent shielding
which is approximately 70% transparent to visible light.

Indium-tin oxide (ITO), a transparent but electrically
conductive vacuum deposited material, is a more
aesthetically desirable alternative. Genvac ITO technology offers a high transmission and durable coating with EMI/RFI shielding capability. ITO also can conduct an applied current to enable heating in cold temperature environments. Proprietary ITO process technology is qualifiied to coat glass or plastic materials where required to meet operating environment criteria.

Genvac Aerospace Technology -
Transparent Conductive Windows

Genvac Aerospace has developed a
patented low temperature (Deposition T is
less than or equal to 90ºC) deposition
process, which produces ITO coatings
with light transmission and shielding
properties previously obtainable only
at high temperatures (Deposition T is
greater than or equal to 350ºC). The
process is used to produce EMI/RFI
filters on rigid plastic substrates with
the same quality previously found
only on glass.

Genvac Aerospace routinely produces
EMI/RFI filters on polycarbonate or acrylic
substrates with sheet resistance < 50
ohms/square with peak visible light
transmission exceeding 90%. Index
matched EMI filters (ITO incorporated as
one layer in a multilayer ULTRA coating)
are available on polycarbonate substrates
with sheet resistance < 15 ohms/square
and reflectance < 0.15%.

Genvac experience since 2004 also includes PEN, PET, various PMMAs, complex shapes, and other proprietary polymeric substrates developed for state-of-the-art LCD display systems.