ITO Polyester PET Film & Conductive ITO Coated Polycarbonate

ITO and Conductive Polyester, PET, Film

Visiontek Systems Ltd produces a wide range of optically clear (ITOPET) Indium Tin Oxide coated transparent, conductive film products. ITOPET products have many uses, for example, as components of touch screens and other position sensors, electroluminescent (EL) lamps, liquid crystal devices, EMI shielding, electrophoretic displays, smart windows and transparent heaters.

Visiontek Systems Ltd ITOPET products are produced by vacuum sputter deposition of ITO, a process that affords excellent coating uniformity and adhesion. All standard ITOPET products, which are listed below, are produced on optical grade polyester film. By special order ITO coatings are available on other film substrates, for example, heat stabalised film, anti glare film, or clear hard coated polyester film. Also by special order, Visiontek Systems offer ITO coatings with a surface resistance that is higher than that of standard ITOPET products.

Please click on ITOPET heading on the table below to view data sheet.

Please note we also supply ITO coated PEN film, Click here for information

ITOPET Product	ITOPET 50	ITOPET 70	ITOPET 80	ITOPET 100	ITOPET 110	ITOPET 200	ITOPET 250	ITOPET 300	ITOPET 500

Ohms/sq	40 - 60	60 - 85	60 - 90	70 - 100	85 - 120	170 - 230	200 - 300	250 - 350	450 - 550
VLT (%)	85	80	80	78	78	82	85	85	88

Please note that ITOPET 50 and ITOPET 100 are stock items.

Note: Transmittance and resistance values depend on base film. The above values are typical of ITOPET products on optical grade polyester film, but are not intended to be specifications. See individual product data sheets for more information.

Electrical Uniformity

All ITOPET products feature electrical uniformity of 10% within any one square foot area, defined as the maximum difference from the average ohms per square value within that area. However, touch screen manufacturers typically achieve <1% resistance linearity by orienting their sensors (busbars) so that the electrical current path is always in the direction of the length of the film roll.

Coating Adhesion

Visiontek Systems Ltd uses a special adhesion- enhancing process to sputter deposit it’s ITO onto the film substrate. All ITOPET products must pass Visiontek System’s stringent adhesion and abrasion test requirements.

Handling ITOPET Film

Vacuum deposited ITO coatings are very thin and are easily scratched or cracked if handled improperly. When removing film from a roll, care should be taken not to bend or crease it. It is important never to allow the ITO coated side to come in contact with a surface, such as a table, during processing operations. Sliding ITO coating over a surface will scratch the coating, resulting in elevated surface resistance and visible defects. Please note that all ITOPET product supplied in sheet form is supplied with protective liner on all surfaces.

Technical Support

Visiontek Systems offers technical support in ITOPET product selection, handling and processing, and in locating sources of manufacturing materials that are compatible with ITO. Visiontek Systems can also provide optical characteristics of individual ITOPET products (transmission and reflectance spectra, L, a, b colour coordinate numbers)

Ordering ITOPET Products

Visiontek Systems sells ITOPET products in roll form and standard sheet sizes of 457 x 610mm (cut to size sheets are available on request). When ordering rolls of film, please correctly specify the film thickness (microns, mils or gauge units), film width, length of film on each roll and number of rolls desired. Rolls are supplied on 6 inch cores unless otherwise requested.

Most of Visiontek Systems customers order ITOPET products on 25 thru 250 microns film and product in that range is more readily available.

Flex-Shield Conductive Film

Flex-Shield is a vacuum deposited multi-layer coating on flexible clear polyester film. It is available on 125 and 175 micron thick polyester and in two levels of conductivity, Flex-Shield 10 with a sheet resistivity of less than 12 ohms/sq.( typically 10 ohms/sq.) and Flex-Shield 20 which is less than 25 ohms /sq. (typically 20 ohms/sq.)

The coatings are optically neutral and have high visible light transmittance. Flex-Shield 10 has visible light transmittance of > 74% and Flex-Shield 20 > 80%.

Flex-Shield is stable in humid environments, showing a resistivity change of only 1% when exposed to 24h 95% RH at 49 deg C, and good thermal stability to 80 deg C , resistance change of 2% after 72 hours at 80 deg C.

The minimum bend radius of the product is 3mm but somewhat higher if the conductive coating is on the outside of the bend.

Flex-Shield is available in sheet form, as die cut shapes or as rolls up to 610mm wide and 1000m long. Flex-Shield can also be supplied with the additional options of a peelable protective film on both faces and an optically clear pressure sensitive adhesive on the non-conductive face.

Although Flex-Shield has been developed for the EMC Shielding market other applications include:- Touch Panels, Membrane Switches and Transparent Heating Elements.

Also available

ITO Coating & Glass

ITO coated PEN Film

Patterned ITO