Conductive Ito Coated PET Film

Protective Film Factory is a manufacturer of conductive ito coated pet film for touch sensors, transparent electrodes, EMI shielding, flexible displays, and electronic electrode assemblies. This transparent conductive PET film uses ITO sputtering coating on optical PET to provide surface conductivity while keeping useful VLT and haze control. Before bulk production, we check sheet resistance uniformity, conductive side identification, four-point probe center/edge mapping, ITO surface condition, and busbar bonding compatibility.

Product Overview

This film is used when transparency and conductivity must work in one material. The optical PET base gives flexibility and dimensional support, while the sputtered ITO layer forms the conductive path for signal response, shielding, sensing, and transparent electrode contact. It is not a general PET protection material.

Sheet resistance should be reviewed with VLT and haze. Low grades, such as 5-20 ohm/sq, are often selected for EMI shielding windows, transparent heaters, and larger electrode areas. Medium grades, such as 30-100 ohm/sq, are common for ITO PET electrode film, touch sensor structures, display electrodes, PDLC film, and sensor panels.

In our in-house sample test, VLT is checked in the visible range, haze is observed under controlled lighting, and sheet resistance is mapped at center, edge, and roll-width positions by four-point probe. Conductive side identification is confirmed before slitting, die cutting, lamination, or bonding to reduce open circuits and unstable contact resistance.

Benefits

Transparent conductivity for touch sensor, EMI shielding, flexible display, and electronic electrode designs.
ITO sputtering coating gives this conductive polyester film a thin conductive layer with flexible PET support.
Resistance grades can be matched with VLT, haze, electrode size, and conductivity needs.
Four-point probe testing supports center, edge, and roll-width resistance mapping.
Conductive side identification reduces reverse bonding risk during lamination, die cutting, or assembly.
ITO layer scratch observation after slitting, bonding, wiping, and cutting helps detect conductivity breaks.
Suitable for sample testing with conductive adhesive, silver paste, conductive ink, and copper tape.

What should be checked before busbar bonding?

Before busbar bonding, the conductive side should be confirmed and kept away from direct rubbing. The ITO coating is thin, so hard fixture pressure, unsuitable wiping material, or aggressive scraping may create micro scratches and raise local resistance. A practical validation test should include four-point probe mapping before bonding, contact resistance after conductive adhesive, silver paste, or copper tape application, edge lifting observation, and resistance change after heat or humidity exposure. For narrow busbar layouts, contact area, curing condition, and bonding pressure should be tested on real sample parts before bulk production.

TDS

Item	Typical Value
Product type	Conductive ITO coated PET film
Structure	Optical PET / sputtered ITO conductive layer
PET thickness	125um / 175um common
Sheet resistance range	5-150 ohm/sq
Common resistance grades	5 / 10 / 15 / 30 / 50 / 80 / 100 / 150 ohm/sq
VLT	>=82-88%, depending on resistance grade
Haze	<=2.0-3.0%, typical sample value
Coating method	Magnetron ITO sputtering coating
Conductive side	Single-side conductive ITO surface
Resistance test	Four-point probe sample check
Mapping position	Center / edge / roll-width points
Side identification	Multimeter or four-point probe confirmation
ITO scratch check	After slitting, die cutting, bonding, wiping, and lamination
Busbar compatibility	Conductive adhesive / silver paste / conductive ink / copper tape
Contact resistance check	After bonding and curing sample test
Heat and humidity observation	Resistance change after selected exposure condition
Supply format	Sheet, slit roll, cut-to-size part
Storage condition	15-30 C, clean dry storage, avoid rubbing ITO side

Production Line

Applications

Touch sensor electrode layer for resistive or capacitive structures.
Transparent electrode film for PDLC, electrochromic, OLED, and display modules.
EMI shielding window requiring visibility and conductivity.
Flexible display electrode and flexible circuit development.
ITO PET electrode film for printed electronics, membrane switches, medical sensors, and control panels.
Transparent heater designs after resistance and busbar layout validation.
Solar cell, photodetector, and optoelectronic sample structures.
Die-cut conductive polyester film parts for electronic assembly and transparent electrode connection.

How do sheet resistance, VLT, and haze affect transparent electrode performance?

Sheet resistance, VLT, and haze should be reviewed together. Lower resistance improves current flow and shielding performance, but it may need a stronger ITO layer that affects visible light transmission or appearance. Higher resistance grades may look clearer, but they may not meet electrical requirements for larger electrode areas. For transparent electrode use, engineers should compare resistance uniformity, VLT, haze, conductive side consistency, busbar position, and final device response after cutting, bonding, or lamination.

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FAQ

What is conductive ito coated pet film used for?

Conductive ito coated pet film is used for touch sensors, transparent electrodes, EMI shielding, flexible displays, PDLC electrodes, and electronic electrode parts.

How is sheet resistance checked?

By four-point probe testing at center, edge, and roll-width sample positions.

Why is conductive side identification important?

Only the ITO-coated side is conductive. Wrong-side bonding may cause open circuits, high contact resistance, or unstable performance.

Can the ITO layer be damaged during converting?

Yes. Slitting, die cutting, bonding pressure, and wiping can create scratches, so resistance and surface condition should be rechecked.