ITO Coated Glass for Transparent Electronics
<strong>ITO (In₂O₃:SnO₂ 90:10)</strong> sputtered on glass by DC/RF magnetron sputtering. Sheet resistance grades 5-500 Ω/sq with transmission >85% and low haze. Work function 4.4-4.8 eV.
Product Overview
ITO is the industry-standard transparent conductive oxide; 90:10 In₂O₃:SnO₂; DC/RF magnetron sputtered on glass; grades 5-500 Ω/sq; transmission >85-90%; RMS <1nm.
A balanced conductivity/transparency trade-off tailored for displays, touch panels, and solar cells—so you get the electrical performance you need with the optical clarity your product demands.
Key advantage: tunable sheet resistance + high transmission + low haze, uniform Rs ±5% / T ±2%.
Key Properties
Transmission >85-95% by grade, work function 4.4-4.8 eV, <strong>RMS <1nm</strong>, haze <1%.
Environmental stability up to 300°C in air, adhesion passes tape test / MIL-STD-883.
Transmission vs. Sheet Resistance
Select the right grade based on your required balance of optical transmission and electrical sheet resistance. Results below are typical by grade:
| Sheet Resistance | Transmission | Thickness | Typical Applications |
|---|---|---|---|
| 5 Ω/sq | > 80% | ~280nm | EMI shielding, high-current electrodes |
| 15 Ω/sq | > 83% | ~150nm | OLED anodes, touch panels |
| 20 Ω/sq | > 85% | ~120nm | Display electrodes, solar cells |
| 100 Ω/sq | > 90% | ~25nm | Biosensors, anti-static coatings |
| 500 Ω/sq | > 95% | ~5nm | Research, low-current electrodes |
Patterning & Customization
Choose unpatterned or patterned ITO via wet etch or laser. Achieve <strong>precise patterns</strong> for touch panels and displays.
Custom rectangular substrates up to 400×500mm, with custom sheet resistance grades and thickness.
Substrate Options
Choose from <strong>Soda-Lime Glass</strong>, <strong>Borofloat 33</strong>, <strong>Fused Silica</strong>, <strong>Sapphire</strong>, or <strong>Silicon (with SiO₂ barrier)</strong>. Select the substrate based on thermal budget, transmission, and cost.
Deposition Process
Deposition via <strong>DC/RF magnetron sputtering</strong> (E-beam evaporation optional). ITO thickness: <strong>50nm-300nm</strong>. Within-wafer uniformity: <strong>Rs ±5% / T ±2%</strong>.
Quality & Reliability
Passes <strong>adhesion tape test</strong> / <strong>MIL-STD-883</strong>. Thermal stability to <strong>300°C</strong> in air. Aging: <strong>85°C/85% RH</strong> for <strong>500-1000h</strong>. Packaging: vacuum-sealed <strong>Class 100</strong> with interleaving.
Specifications
| Parameter | Value / Specification |
|---|---|
| Base Substrate | Soda-Lime Glass, Borofloat 33, Fused Silica, Sapphire, Silicon (with SiO₂ barrier) |
| Coating Material | ITO (In₂O₃:SnO₂, 90:10 wt%) |
| Deposition Method | DC/RF Magnetron Sputtering, E-beam evaporation optional |
| Sheet Resistance | 5, 10, 15, 20, 50, 100, 200, 500 Ω/sq, ±10% tolerance |
| Thickness | ITO: 50nm–300nm; Custom thickness available |
| Transmission @ 550nm | > 85% for 20 Ω/sq, > 90% for 100 Ω/sq |
| Substrate Diameter | 100mm, 150mm, 200mm, 300mm; custom rectangular up to 400×500mm |
| Within-Wafer Uniformity | Rs ±5%, T ±2% |
| Adhesion | Passes Scotch tape test, MIL-STD-883 |
| Surface Roughness | RMS < 1nm |
| Haze | < 1% for display-grade |
| Work Function | 4.4–4.8 eV |
| Patterning Options | Unpatterned, patterned (wet etch or laser) |
| Environmental Stability | Thermal stability up to 300°C in air |
| Packaging | Interleaved, vacuum-sealed, Class 100 |
Applications
Touch Panels & Displays
ITO-coated glass is the dominant transparent electrode technology in capacitive touch panels for smartphones, tablets, and automotive infotainment systems. Patterned ITO rows and columns create the projected-capacitance matrix that detects multi-touch input with sub-millisecond response. For LCD and OLED displays, ITO serves as the transparent pixel electrode, requiring sheet resistance below 20 Ω/sq to minimize RC delay across large-format panels.
OLED Lighting & Displays
ITO anodes with high work function (4.4–4.8 eV) provide efficient hole injection into organic semiconductor layers in both OLED displays and solid-state lighting panels. For top-emission OLED architectures, ITO on glass with anti-reflection coatings achieves > 90% transmission while maintaining < 15 Ω/sq — critical for high-brightness smartphone displays at 500+ nits.
Thin-Film Solar Cells
ITO front contacts are standard in thin-film photovoltaic technologies including amorphous silicon (a-Si), cadmium telluride (CdTe), and perovskite solar cells. The trade-off between sheet resistance (series resistance loss) and optical transmission (photocurrent generation) is carefully optimized for each cell architecture. For tandem perovskite-silicon cells, ITO recombination layers with precisely tuned work function enable efficient carrier transport between sub-cells.
EMI/RFI Shielding
ITO-coated substrates provide optically transparent electromagnetic interference (EMI) shielding for displays and windows in military, aerospace, and medical equipment. At 5 Ω/sq, ITO films achieve > 30 dB shielding effectiveness from 100 MHz to 10 GHz while maintaining > 80% visible transmission — essential for cockpit displays, MRI room windows, and secure facility observation ports.
Biosensors & Lab-on-Chip
ITO electrodes are widely used in electrochemical biosensors, impedance-based cell monitoring, and microfluidic lab-on-chip platforms due to their combination of electrical conductivity, optical transparency (enabling simultaneous optical microscopy), and biocompatibility. ITO working electrodes functionalized with enzymes, antibodies, or aptamers enable amperometric detection of glucose, neurotransmitters, and pathogen DNA.
Electrochromic & Smart Windows
ITO-coated glass serves as the transparent conductor on both sides of electrochromic devices that modulate visible and near-IR transmission under applied voltage. Smart windows for energy-efficient buildings utilize ITO/electrochromic/ITO stacks on meter-scale glass panels, requiring sheet resistance below 10 Ω/sq for uniform coloration switching across large areas.
Metrology & Quality Control
Every substrate inspected; CoA with every shipment; <strong>100% parametric data</strong>.
Source ITO Coated Glass
Custom sizes, sheet resistance grades, patterning. Talk to our engineers to match your requirements—<strong>we can help</strong>.