Transparent conductive film

Panasonic has developed a double-sided full wiring metal mesh using industry’s first unique roll-to-roll process to achieve high wiring aspect ratio, realizing low resistance and high transmissivity at the same time.

Panasonic’s metal mesh produced by its unique process has high aspect ratio wiring lines by gaining a cross-sectional area to depth direction while keeping the fine line width, achiving low resistance and excellent transmissivity at the same time.

Aspect ratio = Line depth (thickness) / Line width

Wire thinning greatly contributes to the aperture ratio.

Since a metal blocks light, the narrower the metal wiring line width is, the greater the aperture ratio becomes. Aperture ratio is proportional to the transmissivity, therefore Panasonic’s metal mesh films can achieve high transmissivity.​

Metal wiring lines are visible due to metal reflection if the line width is not thin enough. In Panasonic’s metal mesh, wiring line width is 2um or less so mesh pattern is invisible to human eyes.​

Panasonic’s metal mesh​

• Invisible due to fine wiring of 2um or less​
• Blackening treatment on metal surface to reduce reflection​

High speed, large capacity, multi-connection and low latency 5G/6G tele-communication uses high frequency bands.  In general, higher frequencies cause issues such as deterioration of radio wave signals due to the influence of various substances, or waves not reaching far enough especially in a city area dense with buildings due to its straight propagation characteristics.​

Panasonic will apply its transparent conductive film technology to provide new solutions to these issues.​

Transparent Antenna

Since 5G/6G tele-communication uses high frequency bands, it is strongly affected by various substances and devices nearby.​ Therefore, the placement of 5G/6G antennas is less flexible, and ideally they should be placed on the top surface of devices.​

Transparent antennas, utilizing Panasonic’s transparent conductive film technology, can be placed anywhere without disturbing the design and function of displays, windows etc.​

Meta-surface​

High frequency radio waves propagates in a straight line, so radio waves cannot reach in long distance, especially in the areas where buildings are densely concentrated.  For this reason, there is a need for metasurface devices, such as reflectors that propagate radio waves in far distance, and lenses that draw radio waves into the room.​

Panasonic contributes to 5G/6G world by applying its transparent conductive film to metasurface technology.​

In current highly advanced information society, AR (Augmented Reality) has been adopted in various scenes including in-vehicles.​ For further penetration of AR, transparent displays are expected to be commercialized that can show sufficient amount of information without obstructing the viewing area.

Applying Panasonic‘s transparent conductive film technology to the backplane of transparent display enables clear display of information while keeping high transmissivity.​

Along with the practical application of autonomous driving, various cameras and sensors are newly equipped on the exterior of vehicles.  In order to prevent false detection caused by fogging or freezing, transparent heaters that do not interfere with the sensing function are required.​

Panasonic applies transparent conductive film technology to a transparent heater to realize a highly stable sensing environment.​ Transparent film heater can be also placed on the lens of surveillance cameras, which have been rapidly installed in recent years, to ensure stable function.​

Panasonic’s metal mesh based transparent conductive film has both low resistance and high transmissivity at the same time.

When used for touch sensors, it will realize customer’s various needs / wants, which could not be realized by conventional transparent conductive films.​

^{*Comparison between our own prototypes​}